Two Rules, Two Statuses

The Biden administration's DOT issued two major airline consumer protection final rules in April 2024. One — the automatic refund rule — is in effect, partially codified in federal statute, and partially under administrative reconsideration. The other — the ancillary fee transparency rule — was vacated by the Fifth Circuit Court of Appeals on February 3, 2026, and is no longer enforceable. A third rulemaking, the airline passenger compensation rule, was formally withdrawn by the Trump administration on November 17, 2025. Airport finance professionals interact with all three through their effects on airline cost structures, customer service operations, and the regulatory environment that shapes airline-airport relationships.

Rule 1: Automatic Refunds (14 CFR Part 260)

The DOT published its final rule on "Refunds and Other Consumer Protections" on April 26, 2024, codified at 14 CFR Part 260 (Federal Register, docket DOT-OST-2022-0089).

The rule requires U.S. and foreign air carriers to provide automatic cash refunds — without requiring passengers to request them — when:

• A flight is canceled and the passenger does not accept rebooking or alternative compensation
• A flight is "significantly changed" and the passenger does not accept the new itinerary
• A checked bag is delayed 12+ hours on a domestic flight or 15–30 hours on international flights (the passenger is entitled to a refund of the checked bag fee)
• An ancillary service that was purchased (Wi-Fi, seat selection, in-flight entertainment) is not provided

The rule defines "significant change" for the first time in federal regulation: a departure or arrival time shift of 3+ hours domestically or 6+ hours internationally; a change in departure or arrival airport; an increase in connections; a downgrade to a lower class of service; or a connection at a different airport or on a less accessible aircraft for passengers with disabilities.

Refunds must be issued within 7 business days for credit card purchases and 20 calendar days for other payment methods. Refunds must be in cash or the original form of payment — airlines may not substitute vouchers or travel credits unless the passenger affirmatively accepts them.

The Statutory Backstop: FAA Reauthorization Act of 2024

On May 16, 2024, President Biden signed the FAA Reauthorization Act of 2024 into law. The act codified several DOT refund rule provisions into statute, effective October 28, 2024 (FAA Reauthorization Act of 2024, Pub. L. 118-63).

Section	Provision
Sec. 501	Establishes a new DOT Office of Aviation Consumer Protection
Sec. 503	Requires airlines to refund passengers for canceled, delayed, or changed flights; mandates automatic refund issuance and passenger notification
Sec. 504	Requires airports to display passenger rights posters regarding flight delays, cancellations, refunds, and lost baggage
Sec. 505	Requires air carriers to provide 24/7 access to live customer service agents
Sec. 506	Requires DOT to create public online dashboards for airline delay/cancellation policies, family seating policies, and seat size policies
Sec. 507	Triples civil penalties for aviation consumer law violations from $25,000 to $75,000 per violation

The statutory refund provisions under Section 503 are separate from and additional to the DOT's April 2024 administrative rule. The statute cannot be vacated by a court under Administrative Procedure Act (APA) challenges — it is an act of Congress. The administrative rule at 14 CFR Part 260 provides implementation details (timelines, definitions, enforcement mechanisms) that go beyond the statutory text.

The DOT's December 2025 Enforcement Adjustment

On December 5, 2025, the DOT announced it would temporarily halt enforcement of the refund rule's treatment of flight renumbering. Under the April 2024 rule, a flight given a different number than the one assigned at purchase is treated as a canceled flight — triggering automatic refund obligations. The DOT's December 2025 notice stated that it would not enforce refund requirements for renumbered flights "so long as the passenger is rebooked on the flight under the new number and the flight is operated without any significant change or delay."

The DOT noted it had received a request for enforcement discretion from two merging U.S. carriers (identified in press reports as Alaska Airlines and Hawaiian Airlines) that described a need to renumber tens of thousands of flights for operational integration and FAA compliance. The DOT determined passengers were not harmed by renumbering in that context and granted the request.

Rule 2: Ancillary Fee Transparency (Vacated)

The DOT published its final rule on "Enhancing Transparency of Airline Ancillary Service Fees" on April 30, 2024. The rule required airlines and ticket agents to disclose passenger-specific fees for first and second checked bags, carry-on bags, and cancellation/change fees at the first point where fare and schedule information is provided. The DOT estimated that consumers were overpaying $543 million annually due to hidden fees.

The Litigation Timeline

Date	Event
July 2024	Fifth Circuit stayed implementation of the rule pending litigation
January 28, 2025	Three-judge Fifth Circuit panel ruled DOT had authority to issue the rule but found a procedural defect: DOT relied on a study not available during the public comment period
October 2, 2025	Full Fifth Circuit (17 active judges) agreed to rehear the case en banc
January 2026	DOJ (representing the current administration) asked the full Fifth Circuit to vacate the rule during oral argument
February 3, 2026	Full Fifth Circuit vacated the rule, holding DOT "failed to comply" with the APA's notice-and-comment requirement

The full Fifth Circuit's unsigned opinion stated: "We conclude that DOT failed to comply with this provision. Therefore, we must apply the APA's 'default' remedy — vacatur."

The DOJ's decision to ask the full Fifth Circuit to vacate the rule — rather than defend it — reflected the current administration's position that the rule exceeded appropriate regulatory scope.

Rule 3: Airline Passenger Compensation (Withdrawn)

On December 4, 2024, the Biden administration published an Advance Notice of Proposed Rulemaking (ANPRM) seeking comment on requiring airlines to provide cash compensation ($200–$300 for domestic delays of 3+ hours, up to $775 for delays of 9+ hours), free rebooking, meals, lodging, and ground transportation when flight disruptions are caused by factors within the airline's control (DOT ANPRM, Docket 2105-AF20, December 11, 2024).

The DOT, under Secretary Sean Duffy, announced in September 2025 that it planned to withdraw the ANPRM. The formal withdrawal was published in the Federal Register on November 17, 2025 (90 FR 86123). The DOT stated the rule would result in "unnecessary regulatory burdens" and that it would "allow airlines to compete on the services and compensation that they provide to passengers rather than imposing new minimum requirements."

For reference, the European Union's EC 261/2004, the United Kingdom's UK261, Canada's Air Passenger Protection Regulations, and Brazil's ANAC Resolution 400 all include mandatory delay compensation frameworks.

The A4A Petition: 93 Pages of Requested Rollbacks

On May 5, 2025, the DOT opened docket OST-2025-0044 seeking public comment on "Ensuring Lawful Governance and Implementation of the President's 'Department of Government Efficiency' Deregulatory Agenda." Airlines for America (A4A), the trade group representing Alaska, American, Delta, Southwest, and United, submitted a detailed filing requesting the rollback of multiple consumer protection rules.

A4A's filing requested the DOT to:

• Repeal the automatic refund rule (14 CFR Part 260)
• Rescind or amend the full fare advertising rule, which requires airlines to include all mandatory fees and taxes in the advertised price
• Eliminate family seating provisions that ban fees for seating children with parents
• Limit or eliminate the monthly Air Travel Consumer Report, which publishes comparative data on flight delays, cancellations, complaints, and mishandled baggage
• Remove DOT's airline customer service dashboards
• Reduce wheelchair-handling requirements

A4A argued that airlines would "police themselves" and that the consumer protection framework imposed "unnecessary costs and bureaucracy."

The Full Fare Rule: Under Reconsideration

The DOT's full fare advertising rule (14 CFR 399.84), which requires that any advertised airfare include all mandatory charges including government-imposed taxes and fees, is now subject to a proposed rulemaking. The DOT announced it will publish an NPRM titled "Enhancing Flexibility of Air Fare Price Advertising" — anticipated for publication in December 2025 — that would "allow airlines and ticket agents greater flexibility in how they advertise air fares."

The DOT has stated the rule would "eliminate overly prescriptive requirements which prevent airlines from highlighting government taxes on air transportation". This language suggests the DOT may propose allowing airlines to advertise base fares exclusive of government-imposed taxes and fees — a reversal of the current rule's requirement that the full price be displayed. The FTC's separate Junk Fees Rule (finalized December 2024) permits businesses to exclude government charges from the total advertised price, creating a potential inconsistency if DOT's rule remains unchanged.

DOT Enforcement Record: Quantitative Benchmarks

Between January 2021 and January 2025, the DOT oversaw the return of approximately $4 billion in refunds and reimbursements to airline passengers, including more than $600 million to passengers affected by the Southwest Airlines holiday disruption in December 2022. During that same period, DOT assessed more than $225 million in civil penalties against airlines for consumer protection violations. For comparison, between 1996 and 2020 — a 24-year period — DOT assessed a cumulative total of $70 million in such penalties.

The DOT OIG, in a September 2025 audit report, found that the DOT's Office of Aviation Consumer Protection (OACP) had permitted credits and offsets that reduced assessed civil penalties by up to 50%, that OACP had not resumed analyzing airline responses to consumer complaints as of April 2025, and that OACP's practice of accepting airline self-certifications for penalty offsets without verification "leaves OACP at risk of inaccurately crediting and offsetting civil penalty amounts".

Current Status Summary (as of March 2026)

Rule/Provision	Status	Legal Basis
Automatic refund rule (14 CFR 260)	In effect; flight renumbering enforcement paused Dec 2025; DOT reviewing scope	DOT final rule (April 2024) + FAA Reauthorization Act Sec. 503 (statute)
Ancillary fee transparency rule	Vacated by full Fifth Circuit, Feb 3, 2026	No longer enforceable
Passenger compensation (delay/cancellation cash)	Withdrawn by DOT, Nov 17, 2025	No rule in effect; no statutory mandate
Full fare advertising rule	In effect; NPRM to amend expected Dec 2025	DOT may allow base fare display without taxes
Family seating fee ban	In effect under FAA Reauthorization Act	Statutory (Pub. L. 118-63)
24/7 live customer service	In effect under FAA Reauthorization Act Sec. 505	Statutory
Triple civil penalties ($75K/violation)	In effect under FAA Reauthorization Act Sec. 507	Statutory
Airport passenger rights signage	Required under FAA Reauthorization Act Sec. 504	Statutory

Implications for Airport Finance

Section 504 signage requirements. The FAA Reauthorization Act of 2024, Section 504, requires airports to "prominently display posters that clearly outline the rights of passengers regarding flight delays and cancellations, refunds, lost baggage, and more". This is a direct statutory obligation on airport operators — not airlines — and imposes a compliance requirement that airports should track against the DOT's implementing guidance.

Airline cost pass-through under residual rate structures. The automatic refund rule imposes operational costs on airlines: system modifications for automatic refund processing, customer notification infrastructure, and the cash flow impact of 7-day refund timelines that replace slower voucher-based processes. Under residual rate-setting methodologies, airline operating costs are inputs to the rate base. If airlines incur measurable compliance costs from 14 CFR Part 260, those costs may flow through to airport rates and charges. The magnitude depends on each airline's refund volume — the DOT OIG report notes that DOT enforcement actions related to just the Southwest 2022 disruption resulted in $90 million in voucher distributions over three years.

Ancillary fee transparency and airport benchmarking. With the ancillary fee transparency rule vacated, airlines are not required to disclose baggage, seat selection, or change fees at the point of fare search. For airports relying on published fare data for air service development analysis, route benchmarking, or incentive program design, the absence of standardized fee disclosure means that the total cost to the passenger — and therefore the actual revenue per enplanement captured by the airline — remains opaque in publicly available data sources.

Deregulatory direction and airline financial condition. The current administration's withdrawal of the compensation rule, the DOJ's position supporting vacatur of the fee transparency rule, the planned amendment of the full fare rule, and A4A's 93-page petition collectively signal a deregulatory trajectory for airline consumer protection at the administrative level. The statutory provisions enacted in the FAA Reauthorization Act are not subject to administrative withdrawal — they require an act of Congress to repeal. Airports operating under use agreements that reference DOT regulatory requirements should evaluate which provisions are grounded in statute versus which are based on administrative rules subject to revision or vacatur.