In the United States, a late flight usually does not earn you cash just because the delay is long. A refund is different: if the airline cancels or significantly changes the itinerary, you generally must turn down the replacement travel to get the fare back.

Take the new flight, and the DOT refund rule usually won't give you a full-ticket refund solely because the delay crossed a time threshold. Europe, the UK, and Canada use different tests. Your departure airport and operating airline matter more than your nationality.

Start with the remedy you want

Travelers use "refund" to describe several different payments. That distinction determines both the rule and the evidence you'll need.

One disruption can support more than one request. An eligible EU passenger might receive care during the wait, fixed compensation after completing the journey, or a refund after choosing not to travel.

U.S. delay refunds depend on your travel choice

For refund purposes, the DOT's significant-change thresholds generally look at the scheduled arrival. A domestic itinerary scheduled to arrive at least three hours later, or an international itinerary scheduled to arrive at least six hours later, will usually qualify. A different airport, an added connection, or another major change can qualify too.

Those numbers decide refund eligibility. They are not compensation rates.

If you board the replacement flight, you usually can't later demand a full fare refund solely because the delay passed the threshold. If you reject the changed itinerary instead, the airline or ticket agent that handled the ticket generally must return the eligible fare to your original form of payment.

The usual timing is seven business days for a credit-card payment and 20 calendar days for other payment methods. A voucher is not the same as a required cash or card refund.

Read the DOT's refund guidance before accepting a credit.

Thing is, the reason for a U.S. delay usually matters more for meals and hotels than for this refund test. A weather delay can still support a refund if the airline significantly changes the itinerary and you decline to travel.

U.S. law generally does not require fixed compensation simply because a flight arrived late. Covered airlines must publish customer service plans under 14 CFR Part 259, however. Those plans may promise rebooking, meals, hotel rooms, or other help in specific situations, and the DOT can enforce those published commitments.

Check the current plan. "Controllable delay" isn't a universal cash-compensation rule.

Airline names do not create a separate U.S. payment rule

Delta, United, American, and other U.S. brands follow the same basic federal refund framework. The route, operating carrier, ticket issuer, and fare terms do the real work.

To be honest, a claim form is only the delivery channel. It doesn't decide whether you qualify.

Save the confirmation number. If the airline rejects the request, ask for the reason in writing.

EU261 and UK261 use route coverage and arrival delay

EU261 generally protects every passenger leaving an EU airport, regardless of the airline's nationality. A flight arriving in the EU from outside the EU is generally covered only when an EU carrier operates it.

UK261 has a separate route test. It generally covers flights leaving a UK airport on any airline and flights arriving in the UK from outside the UK when the operating carrier is a UK airline. A flight from the EU to the UK may instead fall under EU261.

Turns out, the website where you bought the ticket isn't the key fact. The operating carrier and the route are.

For both systems, fixed compensation normally depends on arrival at the final destination, not only on how late the aircraft left.

The last row reflects a 50 percent reduction for qualifying long-haul delays. A U.S.-Europe flight exceeds 3,500 km, but every late arrival on that route does not earn the full amount.

Extraordinary circumstances can remove the fixed-compensation payment. Severe weather, air traffic restrictions, and some security events may qualify. Routine technical or crew problems usually aren't enough on their own.

A departure delay of at least five hours can create a separate choice. Depending on the applicable rules, the passenger may continue, reroute, or request reimbursement instead of traveling. That is a refund right, not the same as arrival-delay compensation.

Care is separate. Reasonable meals and overnight accommodation may still be due even when an extraordinary event removes fixed compensation.

A single reservation can also change the result. Under EU and UK rules, a protected itinerary generally uses the final destination for the arrival-delay calculation. A self-booked connection on separate tickets may not receive that same protection.

Canada and Australia use different tests

Canada

Canada's Air Passenger Protection Regulations focus first on the cause and the airline's size. For a large airline, fixed compensation generally requires a delay within the carrier's control and not required for safety reasons.

Smaller airlines can have lower bands. Weather or a safety-related event can change whether compensation is payable.

These amounts are separate from rebooking and refund rights. Start with the airline. If it doesn't resolve the complaint, the Canadian Transportation Agency is the relevant escalation route.

Australia

Australia has no universal five-hour payment or automatic cash-compensation rule for airline delays. The airline's conditions of carriage usually provide the first answer.

Australian Consumer Law may offer remedies for a major failure. A "major failure" isn't a stopwatch; the facts matter, including whether the service was substantially different from what was promised or wasn't supplied within a reasonable time.

If that legal standard is met, a consumer may be able to cancel and seek a refund or claim a loss. Ask the airline in writing first. State or territory consumer affairs offices can provide information, while the Australian Competition and Consumer Commission generally doesn't decide individual refund disputes.

International delay losses are a different claim

The Montreal Convention can apply to qualifying international carriage. It may allow a passenger to claim proven financial loss caused by the delay, subject to a treaty liability limit expressed in Special Drawing Rights.

This is not a flat payment for inconvenience. Keep receipts and show the connection between the delay and the loss. The Convention also has a general two-year time limit, although the correct claim route can depend on the itinerary.

It doesn't replace a U.S. ticket-refund right or EU fixed compensation. Those are separate claims.

How to file the claim

A strong request identifies one remedy and supports it with a short record. Use this order:

1. Save the travel record. Keep the booking confirmation, boarding passes, delay notices, app screenshots, airport photos, and receipts. Write down the scheduled and actual arrival times. Gate screens, app notices, and email updates may disagree by a few minutes, so save them anyway.
2. Decide before accepting replacement travel. In the United States, don't take the replacement flight if you want to reject a significant change and request a refund. In Europe, decide whether to continue for possible compensation or stop traveling and request a refund.
3. Send the claim to the right party. For a U.S. refund, contact the airline or ticket agent that issued the ticket. For EU or UK compensation, start with the operating carrier. For Canada and Australia, begin with the operating airline.
4. Name the remedy precisely. Include the flight number, date, reservation code, scheduled arrival, actual arrival, and the rule or policy supporting the request.
5. Send supporting evidence. Include documents showing the itinerary, delay, expenses, and any written explanation of the cause. Keep the originals.
6. Follow up in writing. Save the claim number and response. If the answer is vague, ask which event caused the delay and why it defeats your specific request.

A clear U.S. refund request can read:

I am requesting a refund to the original form of payment because the flight was canceled or significantly changed and I did not accept replacement travel.

Connections and delay expenses

Ticket structure matters. A single reservation can protect a missed connection through the final destination, while two separate tickets are different contracts. The first airline doesn't automatically cover the second ticket.

Receipts matter. An airline may give you a voucher and still require documentation for costs you paid yourself.

If the airline rejects the request

Ask for the decision and factual reason in writing. If the response only says the delay was "outside our control," ask whether the stated event was weather, air traffic control, staffing, maintenance, or something else, and how it defeats your particular request.

For a U.S. matter, complain to the airline or ticket agent first. If the response doesn't address the refund rule or the airline's published commitment, use the DOT complaint process.

A DOT complaint creates an official record. It isn't a substitute for every court or insurance remedy.

For an EU or UK claim, use the relevant national enforcement body or an approved alternative dispute-resolution provider when one is available. Canadian passengers can escalate to the Canadian Transportation Agency. Australian passengers may need the airline, a state or territory consumer agency, or an applicable industry dispute scheme.

Deadlines vary by country and claim type

There is no single worldwide deadline for a delayed-flight claim. EU and UK limitation periods can vary by country and claim type. Canada, Australia, airline contracts, and U.S. claims can use different procedures and time limits.

File promptly anyway. Old claims are harder to prove once booking records, delay notices, and operational explanations are gone.

Don't assume a COVID-era credit has a blanket extension through 2026. Check the original cancellation notice, fare terms, credit agreement, and law governing the route. This is general consumer information, not legal advice.

Questions travelers often ask

Does a five-hour U.S. delay automatically qualify for a refund?

Not in every case. A five-hour domestic arrival change generally reaches the DOT significant-change threshold, but you normally must reject the replacement travel. A five-hour international delay may not reach the six-hour federal threshold.

Can bad weather still lead to a U.S. refund?

Yes, if the airline cancels or significantly changes the itinerary and you don't travel. Weather usually matters more to meals, hotels, and fixed compensation than to the basic refund question.

Can I claim EU compensation after taking the delayed flight?

Often, yes. The route must be covered, the final arrival delay must reach the relevant threshold, and no extraordinary circumstance can remove compensation eligibility. Taking the flight doesn't automatically waive EU261 compensation.

Does a missed connection always qualify?

No. The tickets, route, operating carriers, and applicable law all matter. One reservation is usually stronger than two separately purchased tickets.

Before filing, open the booking confirmation and write down the scheduled arrival, actual arrival, operating carrier, and whether you accepted replacement travel. Start with those four details.