A refund is not compensation, a voucher, or a goodwill gesture. It is money back for transportation you did not receive, and under US rules it has thresholds, deadlines and a form of payment attached to it.
Three conditions, all of which must hold
For flights to, from or within the United States, a refund is generally owed when the airline cancels or significantly changes your flight, and you reject the alternative it offers, and you do not travel. Miss any one of the three and the right generally does not attach.
This is the whole article in one idea. The refund right survives only as long as you have not used the replacement. Accepting a rebooking and flying it converts a refund claim into a completed journey. That can be exactly the right choice — but it should be a choice you made, not one a countdown timer made for you.
What counts as a "significant change"
| Change | Domestic itinerary | International itinerary |
|---|---|---|
| Early departure | 3 hours or more earlier | 6 hours or more earlier |
| Late arrival | 3 hours or more later | 6 hours or more later |
| Different airport | Any change of origin or destination airport | Any change of origin or destination airport |
| More connections | Any added connection point | Any added connection point |
| Involuntary downgrade | Any downgrade to a lower class of service | Any downgrade to a lower class of service |
There is a sixth trigger that applies only to some travellers: for a passenger with a disability, a change to a connecting airport — or a substitute aircraft that lacks a needed accessibility feature — is itself a significant change. That is a lower bar than the hour thresholds, and it is frequently missed.
Downgraded but still flew? You are still owed money. DOT is explicit: a passenger who is involuntarily downgraded and travels anyway is not entitled to a refund of the full airfare, but the airline must refund the difference between the original fare and the downgraded fare. This is the one place in the rule where accepting the flight does not extinguish the claim — and almost nobody asks for it.
The deadlines run from your rejection
Once you reject the airline's offer, the refund is due within 7 business days if you paid by credit card and 20 calendar days if you paid another way. Note where the clock starts: not at cancellation, but at your rejection. If you never formally decline, you may never start it.
A refund goes back to the original form of payment unless you affirmatively choose a credit or voucher instead. Choosing the voucher is a decision, and it is usually irreversible — read what you are being offered before you take it, because a voucher presented as the easy option is the airline's preferred outcome, not necessarily yours.
Bags and paid extras have their own rules
Optional-service fees — seats, bags, Wi-Fi, lounge access — are refundable when the service you paid for was not provided. These are separate claims from the airfare and often need separate requests; do not assume they ride along automatically.
Checked-bag fees have their own thresholds, and they are the ones most write-ups get wrong. A refund requires a mishandled baggage report and a "significant" delay:
| Flight | Bag is significantly delayed if |
|---|---|
| Domestic flight | Not delivered within 12 hours of arrival |
| International, segment 12 hours or less | Not delivered within 15 hours of arrival |
| International, segment longer than 12 hours | Not delivered within 30 hours of arrival |
The trigger on an international itinerary is the segment length, not the word "international". A six-hour transatlantic leg and a fourteen-hour one sit on opposite sides of the line.
One rule is currently paused
A pure flight renumbering does not currently trigger a refund. DOT paused enforcement in December 2025 and, on 7 July 2026, extended that pause to 7 July 2027 while it reconsiders how a "cancelled flight" should be defined. The pause is narrow: it applies only where a flight is renumbered and you are rebooked under the new number with no significant change or delay attached. Any qualifying disruption still triggers the normal right.
Some disability-related protections are also inside enforcement-discretion windows at the moment. If you are relying on a specific accessibility protection, confirm its current status with the airline or DOT rather than assuming the rule as written is being enforced today.
Before you click accept
- Measure the change against the thresholds. Three hours domestic, six international, or any airport, connection or downgrade change.
- Price the whole trip, not the airfare. A workable rebooking that saves a non-refundable hotel or a cruise embarkation may beat a refund plus a replacement ticket at today's fare.
- Check accessibility before anything else if it applies — a changed connection or substitute aircraft is itself a trigger.
- Decline in writing, through the airline's stated process, before its deadline. Screenshot everything.
- Find the merchant of record on your card statement before you contact anyone.
- File bag and fee claims separately, with the mishandled baggage report where relevant.
Frequently asked
When does a US airline have to refund my ticket?
When the airline cancels or significantly changes your flight and you reject what it offers instead and do not travel. All three conditions matter. If you accept the replacement and fly it, the cancellation and significant-change refund right generally no longer applies to that airfare.
What counts as a significant change?
DOT defines it as departing 3 hours or more early, or arriving 3 hours or more late, on a domestic itinerary — 6 hours on an international one. A change of origin or destination airport counts, so does an added connection, so does an involuntary downgrade, and so does a connecting-airport change that affects a passenger with a disability.
How quickly must the refund arrive?
Within 7 business days of you rejecting the airline’s offer if you paid by credit card, and within 20 calendar days if you paid another way, such as cash or cheque. The clock runs from your rejection of the offer, not from the moment the flight was cancelled.
I was downgraded but flew anyway. Am I owed anything?
Yes. You are not owed the full airfare because you travelled, but DOT requires the airline to refund the difference between the original fare and the downgraded fare. This is the one situation in the rule where accepting the flight still leaves the airline owing you money.
Can I get baggage fees back if my bag is delayed?
Yes, once the delay is "significant" and you have filed a mishandled baggage report. Significant means not delivered within 12 hours on a domestic flight; on an international flight it is 15 hours if the segment runs 12 hours or less, and 30 hours if it runs longer. The trigger is the segment length, not the word "international".
Does a flight-number change trigger a refund?
Not at the moment. DOT paused enforcement of that requirement in December 2025 and extended the pause to 7 July 2027 while it reconsiders how a cancelled flight is defined. The pause applies only to a pure renumbering with no significant change or delay attached; any qualifying disruption still triggers the normal refund right.
I booked through an online travel agency. Who refunds me?
Check which entity appears on your card statement — that is the merchant of record, and for the airfare it is usually the party that has to issue the refund. Optional-service fees follow a different path: DOT guidance puts responsibility for refunding a fee for a service that was not provided on the operating airline.
What we verified. Every threshold, timeframe and baggage figure above was read on DOT's own refunds page on 5 September 2026, and the renumbering pause against the Federal Register notice of 7 July 2026. Enforcement positions are moving at present: confirm the current status of any rule you intend to rely on before you act on it.
Sources
- US Department of Transportation — Refunds (thresholds, timeframes, ancillary and baggage rules)
- Federal Register — Airline Refunds and Other Consumer Protections, 7 July 2026 (renumbering enforcement discretion extended to 7 July 2027)
- OTGG — Cruise storm reroutes: what a missed port actually pays
- OTGG — Booking is easy. Recovery is the product.
Off The Grid Getaways is an independent travel advisor affiliated with Nexion Travel Group. This article is general information about US Department of Transportation rules as they stood on 5 September 2026; it is not legal advice, and it does not guarantee eligibility for any refund, compensation or accommodation. Rules, enforcement positions and airline policies change. Photographs by Atlantic Ambience and Kenneth Surillo via Pexels, used under the Pexels licence and resized only.
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