FAA Regulations for Delayed Flights: Refunds, Bumping, and Baggage

The first thing to know about FAA regulations for delayed flights is that the FAA is not the agency that writes them. The Federal Aviation Administration handles air safety and airspace. Passenger rights during delays and cancellations come from the U.S. Department of Transportation, specifically its Office of Aviation Consumer Protection. That distinction matters, because complaints sent to the wrong agency go nowhere.

The core federal rule is straightforward: if your flight is cancelled or significantly delayed and you don’t want to travel on the airline’s replacement itinerary, you’re entitled to a full cash refund. What federal law does not do is require the airline to hand you cash, a meal, or a hotel room simply because you were delayed for a few hours and eventually flew. Everything else follows from that split.

When a Delay Entitles You to a Refund

The DOT defines a “significant change” more broadly than most travelers realize, and hitting any one of the following thresholds gives you the right to walk away with a full refund rather than accept a rebooking or voucher:¹

A domestic arrival delayed three hours or more.
An international arrival delayed six hours or more.
A departure moved three hours earlier domestically, or six hours earlier internationally.
A change to a different origin or destination airport.
An added connection on what was booked as a nonstop, or any added layover.
A downgrade to a lower cabin class (you’re also owed the fare difference).
For travelers with disabilities, a change to a connecting airport or aircraft that lacks needed accessibility features.

The added-connection trigger catches people off guard. If you booked a nonstop and the airline reroutes you through a hub, you can refuse and get your money back even when the total travel time barely changes.¹

How the Automatic Refund Works

You should not have to ask. Airlines are required to issue these refunds automatically, without a phone call, email, or form. The money goes back to your original payment method within seven business days for credit card purchases and within 20 calendar days for cash, debit, or other payment forms. The refund covers the full ticket price minus any portion you already flew, plus all taxes, government fees, and airline-imposed fees.²

Airlines can offer a voucher or travel credit instead, but you’re never required to accept one, and cash is always the default. Any voucher offered as an alternative to a cash refund has to be valid for at least five years from the date it’s issued.²

The refund applies regardless of the cause. Weather, mechanical failure, staffing, air traffic control: the reason for the disruption doesn’t change your right to your money back if you choose not to fly the new itinerary.³

What Federal Law Does Not Require

This is where travelers often assume protections exist that don’t. No U.S. law requires an airline to provide a meal voucher, a hotel room, or cash compensation for a delay, no matter how long you’re stuck at the gate. A proposed DOT rule that would have mandated those amenities was withdrawn in November 2025.⁴

Most large U.S. airlines have publicly committed to rebooking at no extra cost, meal vouchers, and hotel accommodations when an airline-caused delay leads to an overnight stay. The DOT publishes an Airline Cancellation and Delay Dashboard that shows which carrier promises what.⁵ These are voluntary policies. Airlines can change them, and they generally get to decide themselves whether a disruption was within their control. When a delay is clearly the airline’s fault, ask at the gate for meals and lodging, and pull up the dashboard on your phone so you can point to the airline’s own published commitment.

Tarmac Delay Rules

One place federal regulation does bite during a delay is on the tarmac. For a domestic flight, the airline must give passengers the opportunity to deplane before the tarmac delay reaches three hours. For an international flight at a U.S. airport, the limit is four hours.⁶

Two exceptions apply: the pilot determines that returning to the gate creates a safety or security risk, or air traffic control advises that doing so would significantly disrupt airport operations. Generic “operational reasons” are not a valid excuse.⁶

Regardless of total delay length, once you’ve been on the tarmac for two hours the airline must provide adequate food, drinkable water, working lavatories, and medical attention if anyone needs it.⁶ “Adequate food” is not defined in the rule; in practice that means snack boxes and water bottles.

Enforcement is real. The DOT can impose civil penalties over $40,000 per violation and has fined carriers hundreds of thousands of dollars for holding passengers past the limit.⁷

If You’re Bumped Instead of Delayed

Being denied boarding on an oversold flight is not the same as a delay, and it has its own compensation rules. When a flight is oversold, airlines must ask for volunteers first. If not enough people volunteer, the airline can bump you involuntarily but owes cash compensation on the spot, generally paid by cash or check at the airport that same day. The amount depends on how late you arrive at your destination:⁸

Arrival within one hour of the original time: no compensation.
Arrival one to two hours late domestically, or one to four hours late internationally: 200% of your one-way fare, capped at $1,075.
Arrival more than two hours late domestically, or more than four hours internationally: 400% of your one-way fare, capped at $2,150.

Those caps took effect in January 2025 and adjust for inflation every two years.⁹ Bumping compensation does not apply to aircraft with fewer than 30 seats, charter flights, weight-and-balance restrictions on planes with 60 or fewer seats, or flights departing from a foreign airport.

Delayed and Lost Baggage

If you paid a checked bag fee and your bag is significantly delayed, the airline owes you a refund of that fee. On domestic flights the threshold is 12 hours after arrival. On international flights it’s 15 hours for flights of 12 hours or shorter, and 30 hours for flights longer than 12 hours. The clock runs from when your flight lands until you actually pick up the bag or it’s delivered.¹⁰

Once the bag crosses that threshold, the fee refund should issue automatically. If the airline declares the bag lost, typically somewhere between five and fourteen days depending on the carrier, you’re owed both the fee refund and compensation for the contents, capped at $4,700 per passenger on domestic flights.⁹

International Delays

Delays on flights between countries that signed the Montreal Convention can trigger airline liability for proven damages up to about $8,400 per passenger (6,303 Special Drawing Rights, effective December 2024).¹¹ You have to show actual financial harm, such as a missed hotel booking, and the airline can escape liability by proving it took all reasonable measures to avoid the delay.

Flights departing an EU or European Economic Area airport, and flights arriving in Europe on an EU-based carrier, may also be covered by EU Regulation 261/2004, which pays flat-rate compensation of €250 to €600 for arrival delays of three hours or more unless extraordinary circumstances caused the disruption. No equivalent flat-rate cash compensation scheme exists under U.S. law for standard delays.

How to Get Your Money

Start with the airline. Airport customer service can often resolve issues on the spot; if not, file a written complaint with the airline directly. Federal rules require the airline to acknowledge your complaint within 30 days and provide a written response within 60 days.¹²

If that doesn’t work, file with the DOT’s Office of Aviation Consumer Protection through its online portal. Have your booking confirmation, flight numbers, dates, and supporting documents ready.¹³ The DOT does not resolve individual disputes the way a court does, but it forwards the complaint to the airline, requires a response, and uses complaint patterns to drive enforcement actions.¹²

When the airline still won’t pay what it owes, small claims court is a workable last step. The DOT itself points travelers there, particularly for violations of the airline’s contract of carriage. You generally don’t need a lawyer, and you can typically sue in any jurisdiction where the airline operates flights or maintains an office. Judges will expect to see that you tried to resolve the matter with the airline first.¹⁴

1
Federal Register. Refunds and Other Consumer Protections
2
U.S. Department of Transportation. What Airline Passengers Need to Know About DOT’s Automatic Refund Rule
3
U.S. Department of Transportation. Refunds
4
Federal Register. Airline Passenger Rights; Withdrawal
5
U.S. Department of Transportation. Airline Cancellation and Delay Dashboard
6
eCFR. 14 CFR Part 259 – Enhanced Protections for Airline Passengers
7
U.S. Department of Transportation. DOT Fines Volaris $300,000 for Unlawfully Keeping Hundreds of Passengers on Tarmac for Hours
8
U.S. Department of Transportation. Bumping and Oversales
9
Federal Register. Periodic Revisions to Denied Boarding Compensation and Domestic Baggage Liability Limits
10
US Department of Transportation. Lost, Delayed, or Damaged Baggage
11
International Civil Aviation Organization. International Air Travel Liability Limits Set to Increase, Enhancing Customer Compensation
12
U.S. Department of Transportation. File a Consumer Complaint
13
Department of Transportation. OACP Form – Consumer
14
US Department of Transportation. Air Travelers: Tell It to the Judge