What Airlines Must Refund When Flights Go Wrong
A cancelled flight feels like a broken promise. A bag that never comes off the belt feels like a smaller one. Federal rules put money behind both — but each carries its own condition, and the conditions are where the confusion lives.
A refund of the ticket price is owed when the airline cancels a flight, regardless of the reason, or significantly delays or changes it, and the traveler chooses not to travel or to accept an alternative flight, travel credit, voucher, or other compensation the airline offers instead. The trigger is that choice.
What Counts as a Cancellation or a Significant Change
A cancellation is a cancellation. The reason does not change what is owed.
The harder word is “significant.” It isn’t left to argument, or to how the day felt. The rules spell out which situations count.
A change or delay counts as significant in situations like these:
- the traveler is scheduled to depart from the origin airport three hours or more earlier on a domestic itinerary, or six hours or more earlier on an international one;
- the traveler is scheduled to arrive at the destination airport three hours or more later on a domestic itinerary, or six hours or more later on an international one;
- the traveler is scheduled to depart from a different origin airport, or arrive at a different destination airport;
- the itinerary picks up more connection points than the original one had;
- the traveler is involuntarily downgraded to a lower class of service;
- a traveler who is an individual with a disability is scheduled through one or more connecting airports different from the original itinerary; or
- a traveler who is an individual with a disability is scheduled onto substitute aircraft on which an accessibility feature they need is unavailable.
Early departure and late arrival share the same three-hour and six-hour numbers, but they are separate situations, measured at opposite ends of the trip: one flight pushed forward, one running behind.
What Is Owed, and What Has to Happen First
Every entitlement here sits behind a precondition. Which precondition depends on what went wrong.
| What went wrong | What has to happen first | What is refunded |
|---|---|---|
| The airline cancels the flight | The traveler chooses not to travel or to accept an alternative flight, travel credit, voucher, or other compensation offered | The ticket price |
| The airline significantly delays or changes the flight | The traveler chooses not to travel or to accept an alternative flight, travel credit, voucher, or other compensation offered | The ticket price — or, where the traveler was downgraded and still flew, the difference between the original fare and the downgraded fare |
| A checked bag is significantly delayed | A mishandled baggage report filed with the airline | The checked bag fee |
| A paid extra other than checked-bag transport is unavailable to all the passengers who paid for it | Knowledge by the carrier that failed to provide the service, plus any required relay to the carrier responsible for the refund | The fee paid for that service |
| A paid extra other than checked-bag transport is unavailable to one or several travelers rather than to all who paid for it | The traveler’s notification to the operating carrier, which counts as a refund request, once that information is confirmed and relayed where that applies | The fee paid for that service |
What surprised me is how much of the ticket-price rule turns on a decision the traveler makes rather than on why the flight fell apart. Declining what the airline offers is the step the rule turns on. Accept it, and the situation lands somewhere else entirely.
The downgrade case has its own arithmetic. A traveler involuntarily moved to a lower class of service who then decides not to travel stands where anyone else declining a significant change stands. Fly anyway, and what is owed is the difference between the original fare and the downgraded fare, not a refund of the full airfare.
Airlines also have to notify travelers about cancellations and significant delays or changes, and about the right to receive a refund. Where someone has subscribed to notices by email, text message, or mobile app push, the notice has to arrive by the method they subscribed to.
When a Ticket Refund Is Generally Not Owed
Except under very limited circumstances, some situations produce no refund of the ticket price. What follows are examples of that side of the line, not a closed set.
A traveler who chose to take the significantly delayed or changed flight, or an alternative flight the airline offered, is not entitled to a refund under the Department’s rules. Taking the flight is itself the choice the rule looks for.
A traveler holding a non-refundable ticket who decides not to travel, or who arrives at the airport late, is not entitled to a refund when the flight operates as scheduled. Ticket type and flight performance both matter here.
Bad customer service on a flight that ran does not earn a refund either. Poor service and a cancelled flight are different problems in the rules, whatever they feel like at the gate.
Taking a significantly changed flight does not always leave someone empty-handed. Where the delay was due to something in the airline’s control and caused a long enough inconvenience during travel, compensation for certain expenses or amenities can come into play — through the airline’s own commitments rather than through the refund rule.
Bag Fees and Paid Extras That Never Arrived
The checked bag fee is refundable when the bag is declared lost by the airline or is significantly delayed. Airlines set their own policies for when a delayed bag crosses over into lost.
“Significantly delayed” is defined by the clock. On a domestic flight, it means the bag is not delivered within 12 hours after the flight arrives. On an international flight — between a U.S. airport and a foreign airport — it means 15 hours where the flight is 12 hours or less in duration, and 30 hours where the flight runs longer than that.
Both ends of the measurement are fixed. The delay begins at the time the traveler was given the opportunity to deplane at the final destination airport. It ends when the traveler picked the bag up at the arrival airport, or when the bag was delivered to a location the traveler and the airline agreed on. Exceptions to the bag fee refund exist.
The precondition for that refund is a mishandled baggage report filed with the airline. The report is meant to be filed as soon as the traveler learns the bag did not arrive with them.
Ancillary services are the other category — optional services related to air travel that an airline provides for a fee, beyond the transportation itself. Transport of checked or carry-on baggage, advance seat selection, in-flight entertainment or Wi-Fi, beverages, snacks and meals, pillows and blankets, seat upgrades, lounge access: services of that kind. When one of them is unavailable through no fault of the consumer — broken Wi-Fi, a cancelled flight, an involuntary denied boarding — the fee paid for it is refundable.
For those fees, and for checked bag fees, the regulation says the refund is to be prompt and automatic.
A Paused Rule for Renumbered Flights
Under current regulations, a flight assigned a different flight number than the one active at the time of ticket purchase is considered a cancelled flight. That classification makes the consumer eligible for a prompt refund and the related notifications.
The Department has paused enforcement of those specific refund and notification requirements where a renumbering alone would trigger them — where the passenger is rebooked on the flight under its new number and it operates without a significant change or delay. The pause began with a notice published on December 5, 2025, and a later notice extended it. It now runs to July 7, 2027.
The Department calls this enforcement discretion temporary and strictly limited, and says the extension gives it time to complete a pending rulemaking on the definition of a flight cancellation, which it calls Refund III. Where a flight number change comes with a significant delay or disruption, the standard refund requirements remain fully enforceable. The pause reaches 14 CFR parts 260 and 399, and nothing wider.
So rule and pause sit side by side. Renumbering alone, with the trip otherwise intact, is the narrow space where enforcement is on hold. A renumbering that also arrives three or more hours late on a domestic itinerary is not.
Customer Service Commitments Sit Apart From Refunds
Airlines are required to adhere to the promises they make in their customer service plan, including commitments to care for customers in the event of controllable delays or cancellations. The Department’s dashboard summarizes those commitments so they can be read in one place and compared across carriers.
A controllable flight cancellation or delay is essentially one caused by the airline. Maintenance or crew problems, cabin cleaning, baggage loading, and fueling are the examples given.
The commitments and the refund entitlement are separate things. A promise about meals or hotel rooms does not change what a traveler is owed when a flight is cancelled or significantly changed, and the absence of such a promise does not shrink it either. Some airlines offer a meal or a hotel room. Others may not.
One layer is a legal entitlement that turns on what happened to the flight and what the traveler then chose. The other is a set of promises about how people get treated while the mess is being sorted out. Only the first one comes with hours attached.