If an airline cancels a U.S. flight, start by choosing between a refund for the unused service and replacement travel. When the carrier cancels the flight or makes a qualifying significant change, and you don't accept alternative transportation, U.S. Department of Transportation (DOT) rules generally allow you to request a refund to the original form of payment. Eligible paid services that weren't provided may also be refundable.

That is usually a refund claim, not a claim for a fixed compensation payment. U.S. rules generally don't require airlines to pay cash for inconvenience, lost time, a missed event, lost wages, or emotional distress after a cancellation.

EU261 and the Montreal Convention work differently and apply only when their jurisdictional requirements are met. Identify the disruption before you choose a complaint route.

Classify the disruption first

What happened What usually controls First move
The airline canceled your flight DOT refund rules and the airline's terms Decide whether you want a refund or replacement travel before accepting an option
The airline made a major schedule or routing change DOT significant-change standards Compare the original and new itineraries and ask how the airline classified the change
You canceled because your plans changed Fare rules, ticket terms, and insurance Check whether the fare is refundable or whether insurance may respond
You missed a connection The ticket structure, operating carrier, and cause of the disruption Determine whether the flights were on one reservation or separate tickets
The itinerary involved qualifying European travel EU261 may apply Check the departure airport, arrival airport, operating carrier, and reason for the cancellation
An international delay caused documented financial loss The Montreal Convention may apply Gather proof of the actual loss and check the Convention's two-year limit

A passenger-initiated cancellation is not the same as an airline cancellation. A "nonrefundable" label usually describes what happens when you choose not to travel; it doesn't by itself eliminate a refund right after the airline cancels the service.

What a U.S. cancellation claim can seek

If the airline canceled the flight or made a significant change and you didn't accept alternative transportation, you can generally ask for:

The cancellation reason can affect voluntary assistance. Weather, air traffic restrictions, and other events outside the airline's control may change whether the carrier offers meals, lodging, or compensation under its customer-service policy. They don't automatically remove the refund option for an unused ticket when you decline the replacement.

Common mistakes in cancellation disputes

Asking only for "compensation"

The word compensation can send a request toward the wrong remedy. State what happened, whether you accepted the replacement, and what you want the airline to do.

The airline canceled flight [number] on [date]. I did not accept the proposed alternative. Please refund the unused transportation and any paid services not provided to the original form of payment. Please confirm the cancellation reason and refund amount in writing.

If you accepted and used a replacement flight, describe that accurately. Don't say you rejected transportation if you traveled on it. You may still have a claim for an unused segment or a service that wasn't provided, but it isn't the same as seeking a full refund after rejecting the alternative.

Accepting a voucher before deciding

A voucher may suit someone who expects to fly with the same airline again. It can also have an expiration date, restrictions, or a different value from the refund available for an eligible cancellation.

Read the offer before selecting "accept." If you want a refund, say so clearly. Under the U.S. DOT refund framework, a carrier generally can't replace an eligible refund with a voucher or credit unless you agree to receive that form of payment.

Save a screenshot of the offer and its terms. The record may show whether you accepted new transportation or merely acknowledged the cancellation.

Treating a vague explanation as the end of the case

"Technical issue," "operational problem," and "safety reason" don't always identify the event that matters under the applicable policy. Ask the airline to state:

For a U.S. refund request, the cause generally doesn't remove the refund option for an unused ticket after an airline cancellation. For an EU261 compensation claim, the cause may determine whether the airline can rely on an extraordinary-circumstances defense.

Routine aircraft maintenance isn't automatically an extraordinary circumstance under EU passenger-rights rules. The Your Europe air passenger rights FAQ says that a failure caused by incorrect aircraft maintenance generally can't be treated as extraordinary. Weather and external air traffic control restrictions may be different, so ask for the facts rather than relying on a label.

Waiting without checking the relevant deadline

There isn't one deadline for every flight cancellation dispute. The applicable time limit may depend on the remedy, the airline's contract of carriage, state law, a travel insurance policy, or the payment method.

Submit the airline request promptly, even if you're still gathering receipts. If you paid by credit card and an eligible refund hasn't arrived, contact the card issuer quickly and ask about its billing-error dispute process and deadline. Debit-card protections and procedures can differ.

EU261 court deadlines vary under the law of the relevant country. The Montreal Convention has a specific two-year limit for bringing an action, but that isn't a universal deadline for ordinary U.S. refund requests. An airline complaint or DOT complaint should not be assumed to stop the Montreal period.

Sending weak or mixed evidence

A boarding pass isn't always necessary. If the airline canceled the flight before you boarded, the booking record and cancellation notice may be more useful.

Keep:

Keep original emails and downloadable PDFs, not just cropped screenshots. Don't send a full passport or other sensitive identity document unless the airline requests it through a secure channel. Redact information that isn't needed to process the claim.

One reservation can contain several travelers, and one trip can contain separate tickets. Create a timeline for each disrupted reservation. Identify every affected passenger, but don't combine a cancellation, a missed connection, a delay, and a voluntary no-show into one unclear narrative.

Treating every downstream cost as part of the ticket refund

A ticket refund normally addresses the unused airline service. It doesn't automatically include:

Travel insurance, a credit-card benefit, the airline's contract, or a separate legal claim may address some losses. Submit reasonable receipts when appropriate, but label each request accurately instead of presenting every expense as part of the ticket refund.

Sending the claim to the wrong company

If you booked through an online travel agency, check who charged your card and who issued the ticket. The airline and the seller may have different roles in the refund process.

Send the request through the airline's official customer-service or refund channel. Contact the booking agency as well if it handled payment or issued the ticket. Keep the account of events consistent so the companies don't treat the requests as unrelated disputes.

A filing process that leaves a clear record

1. Write down the timeline

Record the scheduled departure, when you learned of the cancellation, what the airline offered, and what you did next. Note whether you accepted a new flight, asked for a refund, or bought replacement travel.

2. Choose a primary remedy

For a U.S. airline cancellation, choose the remedy that matches your decision:

Don't request a full refund while also saying that you accepted and completed replacement transportation unless you're asking for a specific partial refund or reimbursement.

3. Submit a short, factual request

Put the booking reference in the subject line. Include the flight details, cancellation date, remedy requested, and payment method. A useful subject line is:

Refund request: flight [number], [date], confirmation [code]

Attach the booking confirmation and cancellation notice first. Add expense receipts only when you're making a separate request for assistance or reimbursement.

4. Preserve proof of submission

Save the confirmation page, email header, case number, and every reply. If you use an online chat, copy the transcript into a file. A phone call may resolve the issue, but follow it with a written summary of what was said.

5. Answer a denial point by point

Ask the airline to identify the actual basis for the denial. It may claim that:

Respond to that specific point and attach the document that addresses it. A short correction supported by a booking record or cancellation notice is usually more effective than repeating the original complaint.

When EU261 may apply

EU261 is separate from U.S. DOT rules. It generally covers flights departing from an EU airport. It can also cover certain flights arriving in the EU from outside the region when operated by an eligible EU carrier. The route and operating carrier matter, and other European arrangements can affect the analysis.

For a covered cancellation, the passenger may choose reimbursement or rerouting. The airline may also owe care, such as reasonable meals or lodging when necessary. Fixed compensation is a separate question.

The standard EU261 compensation amounts are:

Flight distance Standard compensation
Up to 1,500 km €250
More than 1,500 km within the EU, or 1,500 to 3,500 km on other covered flights €400
More than 3,500 km €600

These amounts don't apply to every cancellation. Compensation may not be due if the airline gave sufficient advance notice, offered rerouting within the regulation's timing limits, or proves extraordinary circumstances. It may also be reduced when accepted rerouting arrives within the limits specified by the regulation.

Weather and external air traffic control action can qualify as extraordinary circumstances. A failure caused by incorrect aircraft maintenance generally doesn't. Even when compensation is excluded, reimbursement or rerouting rights and the duty of care may remain.

Don't cite EU261 in a U.S.-only DOT complaint. For a covered European claim, complain to the airline first, then consider the relevant national enforcement body. The Your Europe passenger-rights information also identifies European Consumer Centre assistance for certain cross-border disputes.

What the Montreal Convention does and does not cover

The Montreal Convention generally concerns international carriage and proven damage caused by delay, baggage problems, or other covered events. It isn't a simple alternative to a ticket refund and doesn't create an automatic payment for every canceled flight.

A Montreal claim usually requires proof of an actual financial loss and a connection between that loss and the covered delay or disruption. That differs from claiming a fixed amount for inconvenience. Liability limits are expressed in Special Drawing Rights and can change, so old dollar amounts found online may be inaccurate.

The Convention has a two-year limit for bringing an action. The starting point is governed by the Convention, and filing an airline or regulatory complaint shouldn't be assumed to stop the period.

For an international itinerary with multiple legs, check whether the flights were on one contract of carriage or separate tickets. The analysis may depend on the entire itinerary, the operating carrier, and the type of loss.

Escalation options for U.S. travelers

Use this sequence unless a separate deadline requires faster action:

  1. Airline or ticket seller: Submit a written refund request and ask for a written explanation if it's denied.
  2. Payment provider: If an eligible credit-card refund hasn't arrived, ask the issuer about its billing-error dispute process and deadline. Provide the cancellation notice and your refund request.
  3. Travel insurance: Check the policy for trip interruption, missed connections, lodging, or replacement transportation. The policy terms control.
  4. DOT complaint: The FAA's guidance on airline service complaints directs consumers to the Department of Transportation's Aviation Consumer Protection complaint process. A complaint puts the issue before the regulator, but it isn't the same as a court action.
  5. Court or local consumer assistance: If a substantial amount remains disputed, check the contract, applicable deadline, and court options in the relevant state before waiting longer.

Final checklist

Before submitting, confirm that:

For most U.S. airline cancellations, send the airline a short written request for the unused-ticket refund first. Once that record is clear, address any separate meal, lodging, insurance, card-dispute, or compensation issue.