Airline Passenger Rights — Bumping, Tarmac Delays, Refunds & Baggage

When an airline bumps you off a flight, delays you on a hot tarmac for hours, loses your bags, or cancels your trip and offers a travel voucher instead of cash, federal law determines what you're owed — and it's often more than the airline volunteers. For FAA regulation of aviation safety, see FAA aviation regulation. For disability accommodation rights in air travel, see Air Carrier Access Act. The Department of Transportation (DOT) enforces passenger protection regulations under 49 U.S.C. §§ 41712 and 42301–42302, implementing rules that govern denied boarding compensation, tarmac delay limits, refund rights, baggage liability, and price transparency. These protections apply to all U.S. airlines on domestic routes and to all airlines — domestic and foreign — serving U.S. airports. DOT's 2024 rulemaking significantly strengthened these protections: airlines are now required to issue automatic cash refunds for canceled flights and significant delays, without requiring passengers to request them. The DOT also overhauled the definition of a "significant delay" and imposed new requirements for fee transparency. For the 900+ million passengers who fly in the U.S. each year, understanding these rights is the difference between accepting a $200 voucher and receiving the $1,550 cash payment you're legally entitled to.

Current Law (2026)

Legal Authority

• 49 U.S.C. § 41712 — Unfair and deceptive practices (DOT may investigate and order cessation of unfair or deceptive practices or unfair methods of competition by air carriers; primary authority for DOT consumer protection enforcement, including refund rules, fee transparency, and advertising standards)

• 49 U.S.C. § 42301 — Tarmac delay contingency plans (air carriers must adopt contingency plans for lengthy tarmac delays; plans must include commitments on deplaning, food and water provision, lavatory access, and medical attention during extended delays)

• 49 U.S.C. § 42302 — Tarmac delay reporting (air carriers must submit data to DOT on lengthy tarmac delay occurrences; DOT publishes Air Travel Consumer Reports with complaint and delay data)

• 49 U.S.C. § 40108 — State laws preempted (Congress has largely preempted state consumer protection law in aviation — states cannot impose their own airline consumer protection requirements, which is why federal rules are the only game in town)

• 14 CFR Part 250 — Oversales: the DOT rule governing airline overbooking and denied boarding compensation, applying to any carrier operating scheduled flights on aircraft with 30+ seats:

  • § 250.2a — Volunteer policy: in any oversold flight, the carrier must first seek volunteers for denied boarding before resorting to involuntary bumping; the carrier offers its own compensation (negotiated, no federal minimum for volunteers) in exchange for giving up the reserved seat; a "volunteer" is a passenger who willingly gives up confirmed space in exchange for negotiated consideration; only after the carrier fails to obtain sufficient volunteers may it proceed to involuntary denied boarding
  • § 250.3 — Boarding priority rules: each carrier must establish written priority rules for which passengers will be involuntarily denied boarding; the rules must be non-discriminatory; common carrier priority criteria (applied in reverse order for bumping) include: check-in time, fare class, frequent flyer status, age, and disability; carriers must apply their priority rules consistently and may not use them in a discriminatory manner; airlines must make their priority rules available to passengers on request
  • § 250.5 — Denied boarding compensation amounts: a passenger involuntarily denied boarding must receive cash compensation equal to: (a) 200% of the one-way fare (maximum $1,075 effective Jan. 22, 2025) if the carrier gets the passenger to their final destination within 1-2 hours of original arrival (domestic) or 1-4 hours (international); (b) 400% of the one-way fare (maximum $2,150 effective Jan. 22, 2025) if the carrier gets the passenger to their final destination more than 2 hours late (domestic) or more than 4 hours late (international); these are dollar maximums, not guarantees — a $200 fare bumped 2+ hours generates only $800, well below the cap; the percentages and caps are revised every two years to reflect CPI-U changes (89 FR 84772, Oct. 24, 2024)
  • § 250.6 — Exceptions to compensation: a bumped passenger is NOT entitled to denied boarding compensation if: (1) the passenger fails to comply with the carrier's check-in and ticketing deadlines; (2) the flight is canceled (cancellation rules, not bumping rules, apply); (3) the carrier substitutes a smaller aircraft for "reasons beyond the carrier's control"; (4) the aircraft has 30 or fewer seats; or (5) for international flights, the carrier is governed by foreign regulations that supersede Part 250
  • § 250.8 — Payment: the carrier must tender compensation on the day and at the place of denied boarding; the carrier may offer a travel voucher of greater value as an alternative, but only if the passenger is informed of their right to cash and affirmatively chooses the voucher; a passenger accepting a voucher retains the right to switch to cash within 1 year if the carrier goes bankrupt
  • § 250.9 — Written notice: every involuntarily bumped passenger must receive a written statement of the compensation amount and the carrier's boarding priority rules; the notice requirement creates a paper trail and ensures passengers know their legal rights
  • § 250.11 — Public disclosure: carriers must continuously display at every ticket counter/gate position a notice that they practice deliberate overbooking and that passengers may be entitled to compensation; the display requirement ensures passengers know overbooking occurs before they check in

  The Part 250 compensation formula is one of the most consumer-favorable federal regulations in transportation — it creates a cash entitlement (not a voucher) for passengers who are involuntarily bumped and delayed. DOT enforcement actions and civil penalty authority (up to $25,000 per violation under 49 U.S.C. § 46301) backstop compliance; DOT's Aviation Consumer Protection Division publishes quarterly Air Travel Consumer Reports showing bumping rates by airline. Airlines typically bump a very small fraction of passengers involuntarily (under 1 per 100,000 enplanements for the best carriers) partly because high cash compensation rates make it economical to offer attractive voluntary deals before resorting to mandatory bumping. Recent rulemakings: The 2020 TICKETS Act (40 U.S.C. § 41712) prohibited carriers from removing a passenger who has already boarded and paid, closing the loophole exploited in the 2017 United Airlines dragging incident; § 250.7 implements this provision.

• 14 CFR Part 259 — Enhanced protections for airline passengers (customer service plans, contingency plans for tarmac delays, flight status information, prompt baggage delivery, fare advertising, refund processing within 7 days for credit card purchases)

• 14 CFR Part 260 — Refunds for Airline Fare and Ancillary Service Fees: DOT's April 2024 final rule implementing automatic cash refund requirements — the most significant U.S. airline passenger protection expansion in decades:

  • § 260.6 — Automatic refund for cancelled or significantly delayed flights: when a flight is cancelled (for any reason) or significantly delayed, the airline must automatically provide a full cash refund — without requiring the passenger to request it; a "significant delay" is defined as 3 hours or more for domestic flights and 6 hours or more for international flights; significant changes also trigger refunds: departure airport change, arrival airport change to a different metro airport, connection count increase, class of service downgrade, or a flight change to a different origin/destination; the refund must include the original ticket price plus any seat upgrade, bag fees, or other charges paid for that flight
  • § 260.7 — Opt-in requirement for alternative compensation: an airline may offer the passenger a travel credit, voucher, or other compensation in lieu of a cash refund, but the passenger must affirmatively choose to accept it — the airline may not treat silence or inaction as acceptance of a voucher; the opt-in requirement reversed the prior industry practice of sending vouchers and making passengers fight to receive cash; if a passenger does not respond to a voucher offer, the airline must issue the cash refund
  • § 260.4 — Refund for ancillary services not provided: when a passenger pays for an ancillary service (seat selection, Wi-Fi, in-flight meal, checked bag, upgrades) that was not provided, the airline must provide a prompt and automatic refund; this covers situations where a passenger paid for a window seat and was moved to a middle seat, paid for Wi-Fi that didn't work, or paid for a meal that wasn't served
  • § 260.5 — Refund for lost or significantly delayed checked bags: if a passenger's checked bag fee was paid and the bag is (1) lost, or (2) significantly delayed — defined as 12 hours or more for domestic flights and 15-30 hours for international flights — the airline must refund the checked bag fee; the refund right is automatic; passengers do not need to file a formal claim to trigger the obligation
  • § 260.9 — Consumer notification: upon any cancellation or significant delay, the airline must notify affected passengers of the cancellation or delay and of their right to a refund; the notification must be timely — passengers cannot be stuck without notice at the gate while the airline processes rebooking without informing them of their refund option
  • § 260.10 — Refund timing: refunds must be issued within 7 business days for credit card purchases and within 20 calendar days for cash or check purchases; these timelines are shorter than many airlines' prior informal practices of processing refunds over weeks or months; violations of refund timing are enforceable DOT consumer protection violations

  The Part 260 rule was DOT's response to years of enforcement data showing that airlines systematically offered vouchers to passengers who were legally entitled to cash refunds — relying on passenger ignorance to avoid cash outlays. The automatic refund requirement eliminates the need for passengers to know their rights; it obligates airlines to proactively identify and process qualifying refunds. The rule applies to all covered carriers on flights to, from, or within the United States. DOT indicated it would actively enforce the rule's timing and automatic-refund provisions; violations are subject to civil penalties under 49 U.S.C. § 46301. Rulemaking history: 87 FR 68978 (November 2022) — proposed rule; 89 FR 32760 (April 26, 2024) — final rule, effective October 2024.

How It Works

Airlines routinely sell more tickets than seats because some passengers always no-show. When everyone shows up, federal rules govern what happens. The airline must first seek volunteers willing to give up their seat in exchange for negotiated compensation — there's no federal minimum for volunteers. Only if too few volunteers come forward can the airline involuntarily deny boarding, which triggers mandatory cash compensation (not a voucher): 200% of the one-way fare (max $775) for delays of 1–4 hours to your final destination, and 400% (max $1,550) for delays over 4 hours. This compensation is cash or check, doesn't affect your refund rights on the original ticket, and airlines must provide written notice explaining your rights. The formula applies to the specific one-way segment you're being bumped from — on a $200 one-way ticket you'd get up to $400 or $800, but the dollar caps bind once the fare is expensive enough.

Once a plane is sitting on the tarmac with doors closed, federal law creates hard time limits: after 3 hours on domestic flights (4 hours international), the airline must offer passengers the opportunity to deplane — even if it means returning to the gate. During any tarmac delay, airlines must provide food and water after 2 hours, maintain working lavatories, and provide medical attention if needed. Airlines have paid millions in DOT fines for tarmac violations; these rules emerged from a series of multi-hour tarmac stranding incidents in the late 2000s, including the February 2007 JetBlue ice storm at JFK in which passengers sat on planes for up to about 10 hours. When you book a ticket more than 7 days before departure, federal rules also require the airline to either allow free cancellation within 24 hours of purchase or hold your reservation at the quoted price for 24 hours without payment — most airlines satisfy this via free cancellation.

A 2024 DOT rule substantially strengthened refund protections. You are entitled to a cash refund (not a voucher) when: your flight is canceled for any reason; your flight is significantly delayed (3+ hours domestic, 6+ international); your departure or arrival airport changes; your connections increase significantly; or you're downgraded to a lower service class. The refund must be automatic — the airline must process it without you requesting it — within 7 days for credit card purchases and 20 days for cash. Before the 2024 rule, airlines routinely offered vouchers to passengers who didn't know they could demand cash.

If an airline loses, delays, or damages your checked baggage, it is liable for documented expenses up to $4,700 per passenger on domestic flights (effective Jan. 22, 2025, indexed every two years to CPI-U); the Montreal Convention sets a different limit (approximately $1,700) for international flights. Airlines cannot reduce this liability by posting policies. If your bag is delayed more than 12 hours on a domestic flight, DOT requires airlines to refund your checked bag fee. DOT rules also require airlines and ticket agents to advertise the total price of airfare — including all taxes and carrier-imposed fees — from the first time a price is displayed; fees disclosed only at the final booking step violate these rules. The Passenger Facility Charge (PFC) line on your ticket (49 U.S.C. § 40117) is an airport-collected fee up to $4.50 per boarding (max $18 per round trip) funding capital projects like runways and terminals — collected by the airline but remitted to the airport.

How It Affects You

If your flight is canceled: You are entitled to a full cash refund of your ticket, including any checked bag fees you paid, regardless of why the flight was canceled. You do not have to accept a voucher. If the airline re-books you on another flight that doesn't work for you, you can still request a full refund. Call the airline's refund line or DOT complaint line if the airline resists.

If you're involuntarily bumped: Ask the airline immediately whether the delay to your destination is over 1, 2, or 4 hours. Get the compensation amount in writing. The payment is cash (or check); you're also entitled to your original ticket refund if you choose not to travel. You can simultaneously accept denied boarding compensation and be re-booked on the next available flight.

If you're stuck on a tarmac for more than 2 hours: The airline is legally required to provide food, water, and working lavatories. At 3 hours (domestic), they must offer you a chance to get off the plane. If they don't, file a DOT complaint — tarmac violations are aggressively enforced.

If your bag is lost or damaged: File a report at the airport before leaving. Document everything — take photos of damage. Submit a formal claim in writing. You're entitled to up to $4,700 in documented losses for domestic flights (effective Jan. 22, 2025); keep receipts for any replacement items you purchase due to a delayed bag.

If you want to file a complaint: DOT's Air Travel Complaint portal (aviation.dot.gov) is where complaints go on record. DOT uses complaint data to identify enforcement targets; high complaint rates against specific airlines have triggered fines. Your complaint may not resolve your individual case but contributes to systemic enforcement.

Implementing Regulations

• 14 CFR Part 253 — Notice of Terms of Contract of Carriage: the DOT regulation establishing minimum disclosure requirements for the terms airlines incorporate by reference into passenger ticket contracts — the rules governing the dense "contract of carriage" that governs your rights when flying:

  • § 253.4 — Incorporation by reference requirements: airlines may incorporate contract terms by reference in a ticket without printing the full text (which would make tickets extremely lengthy) only if they give notice that such terms exist and specify where passengers can obtain them; the notice must appear on or accompany the ticket, must inform passengers that any terms that could restrict their rights will be provided on request
  • § 253.5 — Required notice content: the notice must tell passengers that (1) any terms incorporated by reference are part of the contract; (2) certain terms about refunds, baggage, flight cancellations, seating, and liability limitations are subject to special rules; (3) passengers can request a full explanation of incorporated terms at any ticket sales location within the U.S.; the required notice effectively makes airlines disclose that their small-print contract terms exist and where to find them
  • § 253.6 — Availability of explanation: each air carrier must ensure that passengers can obtain a concise and immediate explanation of any incorporated contract term covering: liability limitations for personal injury, death, loss, damage or delay of baggage; overbooking policies; refund policies; and methods of resolving disputes — at any U.S. ticket sales location and, in practice, on the carrier's website
  • § 253.7 — Direct notice for certain restrictions: a carrier may not impose any contract terms that restrict ticket refunds, impose monetary penalties, or raise the ticket price after purchase unless the passenger receives conspicuous written notice of the salient features of the restriction before or at time of purchase; this is the mechanism that requires airlines to disclose non-refundability before you buy a non-refundable ticket — not after
  • § 253.9 — No retroactive changes: an air carrier may not retroactively apply any material amendment to its contract of carriage that has significant negative implications for consumers who have already purchased tickets; this prevents airlines from changing their lost baggage liability limits, seat assignment policies, or cancellation policies to apply to passengers who bought tickets under the prior terms
  • § 253.10 — No venue restrictions: no carrier may impose a contract provision containing a choice-of-forum clause that prevents a passenger from suing in their home jurisdiction for personal injury or death; this protection overrides contract language attempting to require passengers to litigate in the carrier's preferred court location

  Part 253 is the procedural foundation for airline passenger contract rights — not because it directly gives passengers specific rights, but because it ensures passengers have access to and notice of the terms that govern their flights before they're bound by them. The practical implication: if you buy a non-refundable ticket without receiving the § 253.7 disclosure that the ticket is non-refundable, the carrier cannot enforce that restriction. The prohibition on retroactive changes (§ 253.9) protects passengers who booked months in advance from an airline changing baggage fees or cancellation policies that were in effect when they bought their ticket.

• 14 CFR Part 259 — Enhanced Protections for Airline Passengers: the DOT regulation establishing operational requirements that covered carriers must follow to protect passengers during tarmac delays, flight irregularities, and service failures. Applies to all U.S. certificated and commuter carriers operating aircraft originally designed for 30+ seats, and to foreign carriers operating scheduled service to and from the U.S. on the same aircraft types. Key provisions:

  • § 259.4 — Contingency Plan for Lengthy Tarmac Delays: each covered carrier must adopt and adhere to a written tarmac delay contingency plan at every U.S. hub and non-hub airport it serves; the plan must guarantee that on domestic flights, passengers are offered the opportunity to deplane before a tarmac delay exceeds 3 hours (4 hours for international flights); airlines must provide food and water within 2 hours of a tarmac delay beginning, maintain working lavatories, and provide medical attention if needed; exceptions apply only when the pilot-in-command determines deplaning would be unsafe or air traffic control/airport authorities prohibit it — airlines cannot routinely invoke these exceptions as a matter of operational convenience
  • § 259.5 — Customer Service Plan: each covered carrier must adopt a written customer service plan covering 15 specific subjects including lowest-fare disclosure, delay and cancellation notification, baggage handling, overbooking policies, refund processing within 7 business days (credit cards) or 20 days (cash), and accommodation of passengers with disabilities — plans must be posted on the carrier's website and adhered to
  • § 259.6 — Website posting requirements: carriers must post their tarmac delay contingency plans, customer service plans, and contracts of carriage on their websites in easily accessible form — these must be publicly available (not buried or behind login walls)
  • § 259.7 — Response to consumer problems: each carrier must designate an employee responsible for monitoring the effects of delays and cancellations on passengers, with input into decisions on which flights to cancel; carriers must provide a mailing address and email/web address for complaints, acknowledge complaints in writing within 30 days, and send substantive responses within 60 days
  • § 259.8 — Notify passengers of delays, cancellations, and diversions: within 30 minutes of becoming aware of a change in flight status (cancellation, diversion, or delay of 30+ minutes within 7 days of departure), covered carriers must notify affected passengers via the departure gate display, the carrier's website, and the reservation phone system; carriers offering flight status notification subscriptions must push these notifications through whatever channels the subscriber chose

  Part 259 is the regulation that created the tarmac delay rules now familiar to frequent fliers — the hard 3-hour limit that caused airlines to develop real contingency plans and improve coordination with airports and air traffic control. Before the 2010 rule that created Part 259, stranding passengers on planes for 5, 8, or even 11 hours was legal; the most egregious cases (a 2009 Continental Connection flight where passengers sat on the tarmac in Rochester, New York overnight) drove Congress and DOT to act. The combined effect of Parts 253 and 259, together with the 2024 automatic refund rule (14 CFR Part 260), is a passenger rights framework that addresses contract transparency, tarmac emergencies, and refund remedies — though fee disclosure and compensation caps remain significant gaps.

  Recent rulemakings: A 2021 amendment (86 FR 23270) expanded the definition of "significant change" that triggers notification obligations. The 2024 DOT rulemaking (89 FR 32832) updated customer service plan requirements to align with the new automatic refund rule.

• 14 CFR Part 254 — Domestic Baggage Liability: the DOT regulation establishing a minimum liability floor that domestic air carriers cannot contract around — carriers operating large aircraft (originally designed for more than 60 passenger seats) on domestic routes must accept liability for loss, damage, or delay of checked baggage up to at least $3,800 per passenger:

  • § 254.4 — Minimum carrier liability: on covered domestic flights, a carrier may not limit its liability for loss, damage, or delay of baggage to an amount less than the DOT-established minimum — currently $4,700 (effective Jan. 22, 2025); carriers may offer higher declared value (and do, through excess valuation declarations at check-in), but they cannot restrict their liability below this floor through contract terms
  • § 254.5 — Notice requirement: carriers must disclose their baggage liability limit to passengers — the disclosure must appear on or with the ticket, on baggage check receipts, and at the airport check-in location; the notice is the mechanism that makes the $4,700 figure visible to passengers rather than buried in contract-of-carriage fine print
  • § 254.6 — CPI adjustment: DOT must review and adjust the minimum liability limit every 2 years based on changes in the Consumer Price Index; the $4,700 figure reflects the October 2024 final rule (89 FR 84772) raising the limit from $3,800

  Part 254 is the consumer protection underpinning the lost-baggage liability floor that's become well-known among frequent fliers. The CPI-indexing mechanism — unusual among DOT regulations — ensures the limit doesn't erode in real terms as the cost of clothing, electronics, and other checked items grows over time. The regulation applies only to large-aircraft domestic routes; for international travel, the Montreal Convention's separate liability regime (approximately 1,288 Special Drawing Rights, currently around $1,700) applies instead.

• 14 CFR Part 257 — Disclosure of Code-Sharing Arrangements: the DOT regulation requiring airlines to tell passengers when the flight they booked is operated by a different carrier — the code-sharing disclosure rule targeting one of the most common sources of passenger confusion in modern airline travel:

  • § 257.4 — Prohibition on non-disclosure: it is an unfair and deceptive practice under 49 U.S.C. § 41712 for a ticket agent or carrier to fail to disclose that a purchased flight involves a code-sharing arrangement — i.e., that the marketing carrier selling the ticket and the operating carrier actually flying the plane are different companies; the prohibition extends to advertising, itineraries, schedules, and the point-of-sale transaction
  • § 257.5 — Required disclosures: before a passenger purchases a ticket on a code-share flight, the carrier or agent must disclose (1) the name of the actual operating carrier; (2) that the flight is operated as a code-share; these disclosures must appear in computerized reservation systems, printed itineraries, and any schedules displaying the flight; at check-in, airport signage must identify the operating carrier so passengers know which airline counter and aircraft to find

• 14 CFR Part 251 — Carriage of Musical Instruments: the DOT regulation establishing the rights of passengers who travel with musical instruments — implementing 49 U.S.C. § 41724, which Congress enacted after years of conflict between musicians and airlines over instrument handling. Applies to all U.S. certificated air carriers, commuter carriers, air taxis, and indirect carriers operating passenger service to, from, or within the United States. Key provisions:

  • § 251.3 — Small instruments as carry-on baggage: a covered carrier must permit a passenger to carry a violin, guitar, or other small musical instrument in the cabin without charging any fee beyond the carrier's standard carry-on baggage fee, provided the instrument can be stowed safely in an overhead compartment or under the seat in front; the carrier may require that the instrument fit without forcing or damage and may apply the same overhead bin space allocation rules as for standard carry-on bags; the key protection: the carrier cannot impose a special surcharge just because the item is a musical instrument rather than a suitcase
  • § 251.4 — Large instruments as carry-on baggage (seat purchase): a passenger may carry a large musical instrument too big for the overhead bin in the aircraft cabin by purchasing an additional ticket for a seat for the instrument; the carrier must allow this if: the instrument is properly cased or covered, weighs 165 lbs or less (instrument plus case), fits in an approved seat, can be properly secured using the aircraft's seatbelt and any FAA-required lashing devices, and does not block emergency exit access; the carrier may charge for the additional seat (at the same fare as any other passenger seat on that flight) but may not refuse to transport the instrument in cabin if these conditions are met
  • § 251.5 — Large instruments as checked baggage: a carrier must accept a large musical instrument as checked baggage if the sum of its outside linear dimensions (length + width + height including case) does not exceed 150 inches (or the carrier's applicable size restriction for the aircraft), the instrument and case together do not exceed weight limits that would prevent safe loading and stowing, and the instrument is properly packed; the carrier may assess standard excess baggage fees for oversize items but must transport the instrument

  Part 251's practical significance: before this regulation, airlines could and did impose arbitrary handling fees for musical instruments, refuse to allow instruments in the cabin, or mishandle large instruments without clear standards. Professional musicians — for whom a Stradivarius violin or handmade guitar represents tens or hundreds of thousands of dollars of replacement value and an irreplaceable professional tool — had no federal protection. The regulation does not prevent airlines from having reasonable policies, but it prevents them from using instrument rules as a revenue opportunity. Musicians with high-value instruments should confirm compliance at booking (the carrier cannot add instrument surcharges at check-in that weren't disclosed), and should know that the 150-inch checked baggage rule allows full-size cellos and basses to be transported as checked bags even on carriers with strict size limits.

• 14 CFR Part 257 — Disclosure of Code-Sharing Arrangements: the DOT regulation requiring airlines to tell passengers when the flight they booked is operated by a different carrier — the code-sharing disclosure rule targeting one of the most common sources of passenger confusion in modern airline travel:: a ticket sold under Delta's code (DL1234) may be operated by SkyWest, Republic, or any of a dozen regional carriers — each with different customer service policies, in-flight amenities, and frequent-flier credit rules. The regulation does not prohibit code-sharing, which is commercially essential for building connecting networks, but ensures passengers know before they buy whose plane they're actually boarding. Practical stakes include mismatched baggage policies (the operating carrier's rules apply), different onboard service, and — at check-in — arriving at the right terminal.

• 14 CFR Part 234 — Airline Service Quality Performance Reports: the DOT regulation requiring large airlines to collect and submit monthly on-time performance data to the Bureau of Transportation Statistics (BTS) — the raw material for the monthly Air Travel Consumer Report that DOT has published since 1988. Part 234 data is what makes U.S. airline on-time statistics publicly available and comparable:

  • § 234.3 — Applicability: applies to reporting carriers — U.S. certificated air carriers that account for at least 1% of domestic scheduled passenger revenues; currently about 10 major and national carriers are reporting carriers; smaller regional carriers operating under code-share arrangements are covered when their flights are marketed by a reporting carrier
  • § 234.4 — Monthly reporting: each reporting carrier must file BTS Form 234 within 15 days of month-end reporting every scheduled domestic flight on which the carrier enplaned at least one passenger; required fields include scheduled and actual departure and arrival times, the cause of any delay (carrier-caused, weather, NAS/ATC, security, or late aircraft), whether the flight was cancelled or diverted, and the number of minutes of delay; this granular flight-by-flight data enables BTS to compile monthly on-time statistics by carrier, route, airport, and delay cause
  • § 234.7 — Cause of delay reporting: airlines must categorize each delay above 15 minutes into one of five cause categories; carrier delay (maintenance, crew issues, aircraft cleaning, fueling, weight and balance); weather delay (extreme or hazardous weather at origin or destination); NAS (National Aviation System) delay (ATC, airport operations, heavy traffic); security delay (terminal evacuations, re-screening); late aircraft delay (the arriving aircraft was late from a prior flight); the cause categorization enables DOT to distinguish between problems the carrier controls and those caused by the air traffic control system or weather — data that informs FAA capacity decisions and carrier performance comparisons
  • § 234.11 — Disclosure to consumers: during reservations transactions, a carrier must disclose to passengers — upon request — the on-time performance code of any specific flight, based on the carrier's most recent 12-month data; carriers may also voluntarily display on-time performance codes in their reservation systems (§ 234.10) without being obligated to do so; the disclosure requirement ensures that a passenger who asks "how often is this flight on time?" gets a data-driven answer, not a sales pitch

  Part 234 data is available to the public through the Bureau of Transportation Statistics Airline On-Time Performance database (bts.dot.gov/topics/airlines-and-airports/airline-time-performance-and-causes-flight-delays), which is one of the most-accessed federal transportation databases. The monthly Air Travel Consumer Report, compiled from Part 234 submissions, publishes carrier-by-carrier and airport-by-airport on-time percentages, mishandled baggage rates, and denied boarding statistics — the transparency mechanism that enables passengers to compare airline performance and journalists to report on industry-wide trends.

  Recent rulemakings: 71 FR 76474 (December 2006) expanded the data elements required in Form 234 to include cause-of-delay categorization. 76 FR 23154 (April 2011) added requirements for reporting of tarmac delays. 78 FR 57128 (September 2013) updated the reporting threshold.

• 14 CFR Part 203 — Waiver of Warsaw Convention Liability Limits and Defenses: the DOT regulation that implements the Montreal Agreement (Agreement 18900, May 13, 1966) — the bilateral industry agreement under which all U.S. and foreign air carriers operating international flights waive the liability caps and certain carrier defenses of the Warsaw Convention. The Warsaw Convention (1929) and Hague Protocol (1955) set maximum liability limits for international passenger claims that had become grossly inadequate in real terms; the Montreal Agreement bypasses those limits by requiring carriers to contract into unlimited liability on certain international routes as a condition of their operating authority. Key provisions:

  • § 203.3 — Filing requirement: every direct U.S. and foreign air carrier must maintain on file with DOT (Docket DOT-OST-1995-236) a signed counterpart to Agreement 18900 on OST Form 4523; there are no exemptions for size — all direct carriers (except small air taxis that are not commuter carriers, do not participate in interline agreements, and do not engage in foreign air transportation) must file; maintaining the filing current is an ongoing compliance obligation tied to the carrier's operating authority
  • § 203.4 — Montreal Agreement as contract term: carriers required to file tariffs must include Agreement 18900's provisions in their filed tariff; each carrier must display a notice at airport ticket counters and on tickets stating that the carrier has waived the Warsaw Convention liability caps on death or injury claims; the notice makes the waiver visible to passengers rather than a purely regulatory matter between carrier and DOT; failure to provide the notice is a separate violation from failure to maintain the Agreement 18900 filing
  • § 203.5 — Compliance as condition of operations: having a current Agreement 18900 on file is an absolute condition of authority to operate in air transportation; a carrier that allows its filing to lapse loses its right to operate in U.S. international aviation — the DOT treats the filing requirement as jurisdictional, not merely procedural

  Part 203 is the regulatory implementation of the shift from Warsaw Convention caps (which limited liability to approximately $8,300 per passenger at original levels) to the unlimited-liability regime now familiar in international aviation. The Montreal Convention of 1999 — separately ratified by the U.S. — superseded the Warsaw system for carriers operating between signatory countries, establishing two-tier liability: strict liability up to approximately 128,821 SDRs (around $170,000) and unlimited fault-based liability above that. For flights between countries that have not both ratified Montreal 1999, or where disputes arise about coverage, Agreement 18900 remains the operative waiver mechanism. The practical effect: passengers injured on international flights covered by Agreement 18900 can sue without being cut off by the Warsaw caps — liability is determined by actual damages and applicable law, not a treaty ceiling.

  Recent rulemakings: 48 FR 8044 (February 24, 1983) established the current Part 203 framework; 57 FR 40100 (September 1, 1992) updated the filing and tariff requirements. The Montreal Convention of 1999 ratification updated the substantive liability framework but did not supersede Part 203's filing requirements.

• 14 CFR Part 205 — Aircraft Accident Liability Insurance: requires all U.S. and foreign direct air carriers to maintain aircraft accident liability insurance as an absolute condition of their operating authority. No carrier may engage in air transportation without current insurance on file with DOT:

  • § 205.3 — Basic requirement: every direct air carrier (U.S. and foreign) operating in air transportation must maintain in effect aircraft accident liability insurance or an approved self-insurance plan at all times; any lapse terminates the carrier's operating authority automatically
  • § 205.4 — Filing requirement: carriers must file a certificate of insurance with DOT; the certificate must name the insurer, the insured carrier, coverage amounts, and policy period; the filing is a public record
  • § 205.5 — Minimum coverage: coverage amounts are specified by aircraft size and operation type; major airlines carry substantially more than the minimum to satisfy international liability treaties and lender requirements
  • § 205.6 — Prohibited exclusions: policies may not exclude coverage for acts of war, hijacking, or terrorism — preventing carriers from obtaining low-cost policies that nullify coverage for the most catastrophic aviation risks
  • § 205.7 — Cancellation notice: insurers must notify DOT at least 10 days in advance of cancellation or non-renewal; DOT uses this to contact carriers and, if needed, suspend authority before a coverage gap occurs
  • § 205.8 — Cargo liability disclosure: carriers providing air cargo service must give consignors written notice of liability limits before accepting any shipment

• 14 CFR Part 262 — Travel Credits or Vouchers Due to a Serious Communicable Disease: the DOT regulation enacted after COVID-19 establishing passenger rights when a government public health authority issues a Level 4 "Do Not Travel" advisory for a passenger's origin or destination because of a serious communicable disease. Before this rule, airlines during COVID-19 offered expiring vouchers with no cash-refund obligation:

  • § 262.3 — Applicability: covers all air carriers that are the merchant of record and all ticket agents; applies when CDC, WHO, or a U.S. State Department-recognized foreign health authority issues a Level 4 no-travel advisory or equivalent directive
  • § 262.4 — Entitlement: a passenger is entitled to a travel credit or voucher when: (a) the carrier cancels or significantly changes the flight, OR (b) a public health authority issues a Level 4 advisory against travel to or from the passenger's origin or destination before the travel date; the advisory-based entitlement is the novel protection — passengers should not be penalized for following government health guidance
  • § 262.5 — Requirements for travel credits: any credit issued under Part 262 must be (a) freely transferable to another person; (b) equal to the full ticket price including all fees; (c) valid for at least 5 years from issuance; (d) redeemable for any flight the carrier operates — no blackout dates, no service fee to redeem, no forfeiture for not booking by a specific date
  • § 262.6 — No conditions: carriers may not impose conditions beyond identity verification; practices like booking windows and one-time-use restrictions are prohibited for credits issued under Part 262

  Part 262 was adopted in 2022 (87 FR 2149) in direct response to COVID-19 pandemic practices. The 5-year minimum validity requirement addresses the core COVID complaint: vouchers expiring before travel recovered. The transferability requirement addresses vouchers trapped in the name of passengers who died or could not travel. Statutory authority: 49 U.S.C. § 40101.

• 14 CFR Part 252 — Smoking Aboard Aircraft: the DOT regulation implementing a comprehensive ban on smoking (including e-cigarettes) on all scheduled and most nonscheduled passenger flights by U.S. and foreign air carriers (49 U.S.C. § 40102). Key provisions:

  • § 252.3 — Definition of smoking: includes tobacco products, electronic cigarettes whether or not tobacco-based, and any similar product producing smoke, mist, vapor, or aerosol; medical devices such as nebulizers are excluded
  • § 252.4 — U.S. carrier ban: applies to all scheduled passenger flights and nonscheduled flights where a flight attendant is a required crewmember; single-entity charters and on-demand air taxis with no required flight attendant are exempt
  • § 252.5 — Foreign carrier ban: applies on segments between any two U.S. points, and between the U.S. and any foreign point; foreign governments may seek a waiver from DOT's Assistant Secretary for Aviation and International Affairs on sovereignty grounds, but only if an equivalent bilateral smoke-ban agreement is in place
  • § 252.8 — Extent: the ban covers all locations within the aircraft — not just seats, but lavatories, galleys, and crew rest areas
  • § 252.9 — Ventilation prohibition: U.S. carriers must also prohibit smoking whenever the ventilation system is not fully functioning at the manufacturer-specified level for the number of people aboard
  • § 252.11 — Ground operations: U.S. carriers must prohibit smoking from the moment passengers begin boarding (not just from engine start); foreign carriers must prohibit smoking from the start of enplaning through the completion of deplaning
  • § 252.17 — Enforcement: carriers must take affirmative action to prevent smoking wherever prohibited, including in lavatories

  The 2016 rulemaking (81 FR 11427) added electronic cigarettes to the definition of smoking — closing a loophole after some passengers attempted to use e-cigarettes on aircraft as supposedly unregulated alternatives to tobacco. The practical effect is a total ban on any vapor or aerosol-producing device. Violations by passengers are separately addressed under FAA regulations and can result in civil penalties and criminal charges.

  Recent rulemakings: 81 FR 11427 (March 2016) added e-cigarettes to the definition; 81 FR 11428 makes conforming changes.

• 14 CFR Part 243 — Passenger Manifest Information: the DOT rule implementing the Aviation Disaster Family Assistance Act (22 U.S.C. §§ 5501–5513) requiring airlines to collect passenger contact information and transmit it to the U.S. government after an aviation disaster. Key provisions:

  • § 243.3 — Covered flights: international flights operated by U.S. and foreign carriers, meaning flights between a U.S. point and a foreign point or between two foreign points that stop in the U.S.
  • § 243.7 — Information to collect: carriers must use reasonable efforts to collect name, address, and phone number for each passenger; they may not require passengers to provide the information but must offer the opportunity
  • § 243.9 — Retention: carriers must retain the collected information for 60 days after flight departure (3 years for flights involving an aviation disaster)
  • § 243.11 — Post-disaster transmission: upon learning of an aviation disaster on a covered flight, the carrier must: (1) immediately notify the State Department's Managing Director of Overseas Citizen Services (reachable 24 hours via the State Department Operations Center); (2) transmit a complete manifest compilation to the State Department within 3 hours; (3) transmit to the NTSB's Transportation Disaster Assistance Director upon request
  • § 243.13 — Filing requirements: each carrier must file with DOT a brief summary of how it will collect and transmit manifest information, including a 24/7 contact person; any significant change to the collection/transmission methodology must be filed with DOT before the change takes effect
  • § 243.15 — Foreign law conflicts: if a foreign country's law prohibits a carrier from transmitting manifest data to the U.S. government, the carrier must file a statement with DOT before operating covered flight segments

  Part 243 was enacted in response to the Pan Am 103 and TWA 800 disasters, where families struggled to obtain basic passenger lists from carriers. The 3-hour transmission requirement is deliberately tight — it corresponds to the early hours of a crash investigation when family notification and search-and-rescue resource deployment are most time-sensitive. Carriers that cannot meet the 3-hour deadline due to system failures or staffing gaps face prohibited-act liability under DOT aviation consumer protection regulations.

  Recent rulemakings: Originally adopted at 63 FR 8280 (February 1998); amended at 84 FR 15932 (April 2019) to update filing procedures and contact information.

State Variations

Aviation is almost entirely preempted by federal law — states cannot impose their own airline consumer protection requirements. This is a major consumer protection gap: unlike in most industries, you cannot sue an airline under state consumer protection law for deceptive practices related to ticket prices or service terms. Federal law (via DOT enforcement) and the airline's contract of carriage are the only remedies. Some states have attempted to pass laws requiring refunds for weather cancellations; these have generally been preempted.

Pending Legislation

DOT's 2024 refund rulemaking is final but faces ongoing airline industry legal challenges. A proposed rule on junk fee transparency (upfront disclosure of bag fees and seat selection fees) was in final rulemaking as of April 2026. Congressional proposals to raise the denied boarding compensation caps and to eliminate the preemption of state consumer protection law in aviation have been introduced but not enacted.

Recent Developments

• DOT's April 2024 automatic cash refund rule took effect (October 2024): The rule — the most significant passenger protection expansion in decades — requires airlines to automatically issue cash refunds (not vouchers) within 7 business days for canceled flights or significant delays. A "significant delay" is now defined as 3+ hours for domestic flights and 6+ hours for international. Airlines cannot force passengers to accept travel credits instead of cash unless the passenger affirmatively chooses. The rule went into effect October 2024; airlines updated refund processes to comply. In 2023, Southwest paid $140 million to DOT — the largest consumer protection aviation penalty in history — for the December 2022 operational meltdown stranding 2 million passengers.
• Trump DOT appointment of Sean Duffy signals deregulatory shift (January 2025): Secretary Sean Duffy, confirmed in January 2025, has taken a markedly more industry-friendly posture than his predecessor. The Biden-era DOT's proposed rule on "junk fee" disclosure — requiring upfront display of baggage and seat-selection fees in booking searches — was placed under review and had not been finalized or withdrawn as of April 2026. DOT indicated it would not aggressively pursue new ancillary-fee restrictions, leaving consumers to parse base fares that may differ substantially from total out-of-pocket costs once fees are added.
• Ancillary fee regulation remains the major unresolved passenger rights gap: Baggage fees, seat selection charges, and cancellation penalties now represent tens of billions of dollars in annual airline revenue — all of which are largely unregulated at the federal level. The 2024 refund rule covers refunds; it does not cap or require advance disclosure of these fees. Without a disclosure requirement, airfare comparison tools may show significantly lower fares than travelers actually pay. The Biden administration's antitrust lawsuit against the JetBlue/American Airlines Northeast Alliance, which succeeded in breaking up the alliance, did not address fee structures.
• Stranded passenger compensation legislation pending: Bipartisan bills in the 119th Congress would establish statutory compensation for passengers stranded on tarmacs beyond 3 hours, delayed international flights, and lost baggage — modeled on EU Regulation 261/2004 (€250–€600 per passenger depending on flight distance and delay). No bill has advanced to a floor vote; the airline industry opposes mandatory cash compensation and DOT's enforcement-based approach has thus far been the primary recourse for affected travelers.