Short answer: If a flight covered by U.S. Department of Transportation rules is canceled or significantly changed, you can generally choose a refund instead of taking the replacement itinerary. The refund should cover the unused transportation and eligible fees for services the airline didn't provide, and it should go to your original form of payment. Weather, air traffic control, staffing, and other causes usually don't erase that refund right.

The choice changes if you accept a new flight or travel credit. U.S. law generally doesn't require extra cash for inconvenience, lost vacation time, meals, or hotels. Separate airline policies, insurance, card benefits, and EU passenger-rights rules may help in some situations.

First decide: refund or replacement

A refund puts back money for transportation you didn't receive. Compensation is an additional payment for the disruption. U.S. federal law generally doesn't require airlines to pay cancellation compensation.

When U.S. refund rules apply

For a covered itinerary, the airline must provide a prompt refund when it cancels the flight or makes a significant change and you don't accept the offered alternative transportation or travel credit. The cause normally doesn't matter for this refund right.

Examples of changes that may qualify as significant include:

• A domestic departure moved at least three hours earlier or arrival moved at least three hours later.
• An international departure moved at least six hours earlier or arrival moved at least six hours later.
• A change to a different departure or arrival airport.
• An added connection, including changing a nonstop flight into a connecting itinerary.
• An involuntary downgrade to a lower cabin.

The applicable details are in the DOT refund guidance and the Federal Register notice on airline refunds and consumer protections. Older articles may describe earlier rules, so compare them with the official guidance for your booking and disruption.

What the refund covers

The usual refund is for the unused part of the ticket plus eligible fees for services the airline didn't provide. If you flew the outbound portion of a round trip, that doesn't automatically make the entire booking refundable. Ask the airline to show how it calculated the unused amount.

A qualifying refund should go to the original payment method unless you agree to another arrangement. A voucher or airline credit isn't the same thing. You don't have to take one instead of a refund when the DOT rule applies.

DOT timing rules generally require the airline or ticket agent to issue the refund within:

• Seven business days for a credit-card payment.
• 20 calendar days for other payment methods.

The credit may take longer to appear on your card statement. Keep the airline's confirmation until it does.

What the refund rule doesn't promise

A DOT refund right doesn't guarantee:

• A seat on a particular later flight.
• A ticket on another airline.
• Payment for a hotel, meal, taxi, or replacement ticket you bought yourself.
• Compensation for inconvenience or missed vacation time.

An airline may promise rebooking, meals, hotels, or ground transportation in its customer service plan or contract of carriage. Those commitments vary by carrier and may depend on why the flight was disrupted. Check the written policy before spending money.

What to do when the airline cancels

A few minutes spent preserving the record can make the later claim much easier.

1. Save the cancellation notice. Keep the email or app message, take a screenshot of the flight status, and record the flight number, scheduled departure, and stated reason.
2. Check the operating carrier. On a codeshare, the airline that sold the ticket may not be the airline operating the aircraft. That distinction can affect rebooking and, in some cases, an EU261 claim.
3. State your choice clearly. If you want a refund, tell the airline that you decline the replacement itinerary and travel credit and want the unused ticket refunded. Review app prompts carefully so you don't accept a voucher by mistake.
4. Review every segment. Ask whether the cancellation affects your return flight or later connections. If you can't take the replacement, contact the airline before departure rather than simply becoming a no-show.
5. Ask about practical help. Request meals, hotel accommodation, ground transport, or another flight under the airline's written policy. If the request is refused, ask for the reason in writing.
6. Keep the supporting records. Save boarding passes, baggage tags, agent names, case numbers, replacement-booking details, and receipts. A receipt helps prove an expense, but it doesn't by itself guarantee reimbursement.
7. Pause before buying a new ticket. U.S. law generally doesn't require the airline to pay for a replacement ticket you purchase independently. Ask for approval in writing if possible, and check insurance or card benefits first.

Airport staff and airline apps may give different answers. A written message or case number is more useful than relying on a verbal promise.

How to request the refund

Use the airline's refund channel and save a copy of what you submit. If an online travel agency sold the ticket or charged your card, contact the agency as well as the airline and identify the business that processed the payment.

Include:

• Passenger name and booking reference.
• Flight number, route, and travel date.
• The cancellation or significant-change notice.
• A statement that you rejected the alternative, if that is what happened.
• The amount paid and original payment method.
• Proof of any eligible service the airline failed to provide.

A short request is usually enough:

Subject: Refund request for canceled flight [flight number and date]

The airline canceled or significantly changed my itinerary from [origin] to [destination]. I did not accept the alternative transportation or travel credit. Please issue the refund for the unused transportation and eligible fees to the original form of payment. Please confirm the refund amount and processing date.

Don't use that wording if you actually accepted and traveled on a replacement flight. Instead, ask about any unused segments, an involuntary downgrade, or assistance available under the carrier's policy.

If you accepted a new flight

Rebooking may be the practical choice when you still need to reach your destination. Before confirming it, check the new departure time, connections, airports, baggage arrangements, seat assignment, and whether the rest of the itinerary is still active.

Once you accept alternative transportation or a travel credit, a full DOT refund for the transportation you accepted is generally no longer available. That doesn't necessarily resolve every other issue. A partially unused itinerary, a downgrade, covered expenses, or an insurance claim may have separate rules.

If you accepted a replacement but later can't take it, contact the airline before departure. Ask whether it will preserve the remaining segments and explain the fare consequences in writing. Do not assume that failing to appear will be treated like an airline cancellation.

Vouchers, insurance, and card benefits

A voucher can suit someone who plans to fly the same airline again, but read the terms before choosing it. Check the:

• Expiration date.
• Route, fare, or blackout-date restrictions.
• Transfer rules.
• Effect on a possible refund or compensation claim.
• Rules for combining the voucher with other credits.

Travel insurance and credit-card trip protection are separate from DOT rights. Coverage may depend on the cause of the cancellation, how the trip was paid for, policy exclusions, and whether you first sought reimbursement from the airline. Keep the cancellation notice and receipts, and check the insurer's or card administrator's claim deadline.

A claims service can organize paperwork, but it can't create eligibility or extend a legal deadline. Review its fees and authorization terms before signing up.

When EU261 may apply

EU Regulation 261/2004 is separate from U.S. law. It generally covers:

• A flight departing from an airport in the European Union, regardless of the airline.
• A flight arriving in the EU from outside the EU when an EU airline operates it.

Related arrangements can apply in some European Economic Area and Swiss situations. The United Kingdom has a separate passenger-rights regime, so a UK itinerary shouldn't automatically be treated as an EU261 claim.

For example, a New York-to-Paris flight operated by a U.S. airline will usually not be covered by EU261 on the outbound journey. A Paris-to-New York flight generally falls within EU261 because it departs from the EU. Check the Your Europe air passenger rights guidance and Regulation (EC) No. 261/2004 for routing details.

EU261 cancellation choices

When EU261 applies and the airline cancels the flight, it must generally offer a choice of:

• Reimbursement of the ticket, normally within seven days.
• Rerouting to the final destination at the earliest opportunity.
• Rerouting at a later date that suits the passenger, subject to available conditions.

While you wait for rerouting, the airline must provide reasonable care, including meals and refreshments in proportion to the wait. If an overnight stay becomes necessary, that care can include hotel accommodation and transportation between the airport and hotel.

EU261 compensation

A canceled flight may also qualify for fixed compensation. The usual starting point is whether the airline gave less than 14 days' notice:

• With more than 14 days' notice, fixed compensation generally isn't due.
• With seven to 14 days' notice, compensation generally isn't due if the alternative departs no more than two hours earlier and arrives less than four hours later.
• With less than seven days' notice, compensation generally isn't due if the alternative departs no more than one hour earlier and arrives less than two hours later.

The standard amounts are:

The amount can be reduced in some rerouting situations when the passenger reaches the final destination within the permitted delay window. Compensation can be payable in addition to reimbursement or rerouting.

Extraordinary circumstances can remove the fixed-compensation obligation. Severe weather, air traffic management decisions, and some strikes outside the airline may fall into that category. They don't automatically remove the right to care or the choice between reimbursement and rerouting.

A routine technical defect caused by inadequate aircraft maintenance generally isn't automatically extraordinary. The facts and the airline's evidence matter; “operational reasons” alone doesn't settle the claim.

Weather, technical problems, and accessibility

Weather and air traffic control

If weather or air traffic control restrictions cancel a U.S. flight, you can still generally request a DOT refund when you reject the replacement itinerary. Federal law doesn't generally require payment for your hotel, meals, or other consequential costs. The airline's policy, travel insurance, or card benefits may provide another route to reimbursement.

Under EU261, severe weather and similar external events may eliminate fixed compensation while leaving the care and reimbursement-or-rerouting rights in place.

Technical problems and crew shortages

In the United States, an airline may offer meals, hotels, or rebooking when the disruption was within its control, but there is no general federal cancellation-compensation payment. In the EU, technical and staffing problems are assessed under the extraordinary-circumstances standard. A problem the airline could reasonably control or prevent may support compensation; the specific cause and evidence still matter.

Wheelchairs and scooters

Passengers whose personal wheelchair or scooter doesn't fit on a scheduled flight may have separate accessibility protections. Under 14 CFR 382.125(f)(2), the airline must offer free rebooking on the next available flight operated by the same carrier or a partner carrier in the circumstances covered by that rule.

Ask the airline to review the accessibility rule rather than treating the situation as an ordinary voluntary ticket change.

If the airline denies the claim

Use a written escalation trail:

1. Ask why. Request the airline's refund calculation, the recorded cancellation or change reason, and the policy or rule it relied on.
2. Send the evidence again. Attach the notice, proof that you rejected the alternative, the payment record, and receipts for any claimed service.
3. Complain to the DOT. For a U.S. airline or ticket-agent refund dispute, use the DOT consumer complaint process after giving the business a reasonable chance to fix the problem. A complaint can support enforcement, but it doesn't guarantee an individual payment.
4. Contact the card issuer promptly if needed. Ask about a billing dispute if a promised refund never arrives. Credit-card and debit-payment procedures differ, and a dispute isn't guaranteed when you accepted transportation or already received a credit.
5. Use the European route for an EU261 claim. Claim first with the operating airline. If its response is missing or inadequate, identify the relevant national enforcement body through Your Europe's passenger-rights information. Court deadlines vary by country.

Common questions

Do I get a refund if bad weather canceled my U.S. flight?

Generally, yes, if the airline canceled the flight and you decline the alternative. Weather usually affects claims for hotels, meals, and compensation rather than the unused-ticket refund.

Can I get a U.S. refund after accepting a new flight?

Usually not for the transportation you accepted. Ask separately about an unused segment, downgrade, covered expense, airline-policy benefit, or insurance claim.

How much EU261 compensation is available for a canceled flight?

The standard amounts are €250, €400, or €600 based on distance. Notice timing, the rerouting offered, and extraordinary circumstances determine whether payment is actually due.

Is a canceled flight the same as a no-show?

No. An airline cancellation can trigger a DOT refund when you reject the alternative. A no-show is generally governed by the ticket's fare rules and may affect later flights.

Save the cancellation notice before doing anything else. Then tell the airline, in writing, whether you want a refund or rebooking and keep the response with your booking records.