Save the evidence for a delayed-flight complaint before you close the airline app or leave the airport. Your file should answer four questions:
- What booking did you buy?
- What schedule did the airline promise?
- When did you reach the final destination?
- What reason did the airline give for the disruption?
The rule depends on the route and the operating carrier. EU261 and UK261 can provide fixed compensation for qualifying journeys. An ordinary U.S. delay usually depends on the airline's contract, written policy, or a separate refund or consumer-protection issue. The EU261 distance table does not automatically apply to a U.S. flight.
Identify the rule that controls the flight
| Situation | What may control the complaint | Evidence to prioritize |
|---|---|---|
| U.S.-only itinerary | Airline contract of carriage, customer-service commitments, applicable refund rules, and the specific disruption | Airline policy, notices, ticket records, receipts, and written communications |
| Flight departing from an EU airport | EU261, subject to its scope and exceptions | Booking, boarding pass, route, operating carrier, and final arrival time |
| Flight arriving in the EU from outside the EU | EU261 may apply when an eligible EU carrier operates the flight | Operating carrier, complete itinerary, and proof of arrival |
| Flight departing from the United Kingdom | UK261 may apply | Route, carrier, itinerary, and actual arrival time |
| Flight arriving in the United Kingdom from outside the UK | UK261 may apply when an eligible UK carrier operates the flight | Operating carrier and complete journey record |
Your nationality and the website where you bought the ticket usually don't determine EU261 or UK261 eligibility. The departure airport, arrival airport, operating carrier, and whether the flights were on one reservation matter more. A codeshare can make the operating-carrier question especially important.
For European routes, compare your facts with the European Parliament's passenger-rights overview and the European Consumer Centres Network flight-delay guidance. For a UK claim, start with the UK Civil Aviation Authority's guidance on costs and compensation, not a claim company's eligibility calculator.
Keep compensation, care costs, and refunds separate
These are different requests with different conditions. You can ask for more than one remedy, but label each request clearly.
- Fixed compensation: Under EU261, a qualifying arrival delay of more than three hours at the final destination may lead to a fixed payment of EUR 250, EUR 400, or EUR 600, depending mainly on distance. Some long-haul cases may involve a reduced amount. UK261 has comparable bands, with payments of up to GBP 520.
- Care and expense reimbursement: On qualifying EU or UK journeys, the airline may have to provide reasonable refreshments, communications, and, when necessary, accommodation during a substantial delay. If it doesn't provide that care, itemized receipts can support reimbursement.
- Ticket refund: A departure delay of at least five hours can give a passenger on a qualifying European journey the choice to abandon the trip and request a refund instead of traveling. Don't assume you can both reject the journey for a refund and continue using the ticket.
- U.S. remedies: The United States doesn't use the EU261 distance-based compensation table for ordinary delays. Check the airline's contract and written disruption policy. If the issue was a cancellation or a significant change and you didn't accept replacement travel, review the current U.S. Department of Transportation refund requirements separately.
A delay may qualify for care without qualifying for fixed compensation. An airline's defense to a compensation request also doesn't automatically decide whether care costs or a refund are owed. Missed wages, unused hotel rooms, upgrades, alcohol, and unrelated purchases shouldn't be presented as automatic entitlements.
Evidence to collect
1. Proof of the booking and passenger
Keep documents showing what you bought and which journey was affected:
- Booking confirmation and e-ticket receipt
- Original itinerary showing scheduled departure and arrival
- Boarding pass or mobile boarding pass
- Record locator, ticket number, and flight number
- Details for every segment if the trip involved a connection
- The operating carrier's name, not only the marketing airline
- Proof that you checked in or traveled, if the airline disputes it
A boarding pass can help show that you were booked, checked in, or accepted for travel. By itself, it usually doesn't prove the final arrival delay or the cause of the disruption.
If you no longer have a boarding pass, ask the airline for its check-in or passenger record. Submit the booking confirmation, payment receipt, and rebooking documents you still have. Don't send an unredacted passport or full payment-card number unless the official claim portal specifically requires limited information.
2. Proof of the original and actual times
Create a timeline while the details are fresh. Record:
- Scheduled departure and arrival times
- Each delay announcement and schedule change
- Actual takeoff, if available
- Actual arrival at the final destination
- The time the aircraft reached the gate or passengers were allowed to leave, if relevant
- Missed-connection and rebooking times
- The source of each time, such as the airline app, an email, or an airport display
For EU261 and UK261, the key delay is generally the arrival delay at the final destination, not simply how late the aircraft left its first airport. If you had a connecting itinerary on one reservation, preserve evidence for the complete journey. A long delay on the first segment may matter because it caused a late arrival at the final destination.
Useful records include:
- Screenshots of the airline's flight-status page or app
- Delay and rebooking emails, text messages, and push notifications
- Photos of airport information screens showing the flight number and status
- Gate announcements written down with the time
- The airline's arrival record or a post-flight status page
- Calendar entries or notes made during the disruption
A screenshot is more useful when it shows the flight number, date, airport, status, and capture time. Keep the original file and don't crop away identifying details. A public flight tracker can corroborate your timeline, but it shouldn't be your only proof when the airline's records are available.
3. Evidence about the cause
The stated cause can affect fixed compensation under EU261 or UK261. An airline may rely on circumstances outside its reasonable control, but a vague description such as "operational issue" doesn't identify the specific event.
Ask staff or customer support for a written explanation. Save:
- The airline's disruption notice
- Emails identifying weather, air-traffic restrictions, airport closures, or another stated cause
- Rebooking records that show the reason supplied by the carrier
- A case number and the representative's name or identification
- Any written response to your compensation claim
Don't try to prove the cause with a weather screenshot alone. It may show conditions in one location without showing what affected your flight. Use outside information as background, then ask the airline to explain the connection between the event and your delay.
An airline's statement that an event was "extraordinary" isn't itself a substitute for the facts. Ask what happened, keep the response, and assess it under the rule that applies to your route.
4. Receipts for reasonable expenses
If you paid for necessities during a delay, keep the full receipt and record why you incurred the cost. A useful expense file includes:
- Itemized receipt
- Date and local time
- Vendor and location
- Currency and amount
- What the purchase was for
- Whether the airline gave you a meal, hotel, or transport voucher
- Proof of payment if the receipt doesn't show it
For a European claim, explain that the airline did not provide the care that applied to your delay. For a U.S. complaint, identify the exact airline policy or promise on which you rely. Don't describe a policy-based reimbursement request as a universal legal right.
Choose reasonable options. A modest meal and necessary overnight accommodation are easier to assess than premium purchases. If the airline directs you to use a particular hotel or transport service, retain that instruction.
5. The complete communication record
Save every message from the airline and every response you send, including:
- Delay alerts and cancellation notices
- Chat transcripts
- Customer-service emails
- Claim forms and confirmation numbers
- Rejection letters
- Voucher offers
- Written explanations of the delay
- Records of calls, including date, time, agent name, and case number
An apology can confirm that the airline acknowledged the disruption, but it doesn't automatically prove that fixed compensation is owed. If you discuss the claim by phone, send a short follow-up email summarizing what was said and ask the airline to correct any misunderstanding.
If you rely on an online policy, save a PDF or screenshot showing the page and the date you accessed it. Airline policies can change, and a later version may not show what was promised during your trip.
Build a usable delay timeline
Use a table like this instead of sending a folder of unlabelled screenshots:
| Time and time zone | Source | Event | Why it matters |
|---|---|---|---|
| Scheduled arrival | Booking confirmation | Original arrival time | Establishes the promised schedule |
| Delay notification | Airline app or email | Delay and stated reason | Shows when the airline acknowledged the disruption |
| Rebooking notice | Airline message | New routing or departure | Shows any replacement travel |
| Final arrival | Airline record or airport evidence | Arrival at the final destination | Establishes the delay used for a European compensation claim |
| Expense time | Itemized receipt | Meal, hotel, or other necessary cost | Links the expense to the disruption |
Use local time consistently and label the airport. If the airline and airport show different times, keep both records and explain the difference instead of silently choosing the more favorable one.
Submit the complaint
EU261 or UK261 claim
- Confirm that the route and operating carrier fall within the relevant regulation.
- Calculate the delay at the final destination from the original scheduled arrival.
- Check whether the stated cause may be an exception to fixed compensation.
- Request fixed compensation, care-cost reimbursement, and a ticket refund separately if the facts support each remedy.
- Attach a concise evidence packet with numbered files.
- Submit through the airline's official complaint or compensation form.
- Keep the confirmation page, claim number, and a copy of everything submitted.
A short claim is easier to review than a long narrative. State the flight, date, booking reference, scheduled arrival, actual arrival, requested remedy, and attached evidence.
You can use this structure:
Subject: Flight [number] on [date] - delay claim
I was booked on [route] under booking reference [reference]. The scheduled arrival was [time and date], and the recorded arrival at the final destination was [time and date].
I request [fixed compensation under the applicable passenger-rights rule] and [reimbursement of the attached eligible expenses]. The attached documents show my booking, the delay timeline, the airline's communications, and the itemized receipts.
Please confirm receipt and provide the specific reason if you reject any part of this request.
Don't send original documents. Number the attachments and remove unnecessary personal information.
U.S. complaint
Start with the airline's formal complaint channel and identify the promise or rule involved. Your evidence should show:
- What the airline originally sold or scheduled
- What changed and when
- What the airline said it would provide
- Which expense or refund you are requesting
- Why the airline's response did not satisfy that policy or request
If the issue concerns a federal protection, you may also file a complaint with the U.S. Department of Transportation. A DOT complaint isn't the same as an automatic personal compensation award, so keep pursuing the airline's stated refund or reimbursement process when appropriate.
If the airline rejects the claim
Read the rejection closely. Common explanations include:
- The airline says the delay was below the applicable arrival threshold
- It disputes the final arrival time
- It says the flight was outside the regulation's geographic scope
- It identifies a circumstance it says was outside its control
- It says you weren't on the flight or can't be matched to the booking
- It says the expense wasn't necessary or wasn't supported by an itemized receipt
- It treats the request as a refund claim when you intended to request compensation, or the reverse
Reply to the specific reason instead of submitting the same form again. Attach the missing record, identify the exact time or route evidence that resolves the issue, and ask the airline to address each requested remedy separately.
For UK claims, check whether the airline or airport belongs to an approved alternative dispute resolution scheme. The UK CAA's ADR guidance says to include relevant documents, itemized receipts, and a clear summary. The CAA also states that an ADR complaint may need to be submitted within 12 months of the last written communication when that route applies. Check the provider's current terms.
Aviation ADR says the airline or airport is generally given 28 days to respond in its process, after which the passenger has 14 days to accept or reject the response. Those timelines apply to that scheme's process, not every airline complaint.
For an EU cross-border dispute, identify the relevant national enforcement or consumer-support route for the departure country. The European Consumer Centres Network can help explain cross-border passenger-rights issues. Don't assume that a third-party claim service extends a legal deadline.
Mistakes that weaken a delay complaint
- Treating a late departure as proof of a qualifying late arrival
- Using the EU261 compensation table for a U.S.-only flight
- Keeping only a boarding pass and no timeline
- Relying solely on a flight-tracking website or social-media post
- Failing to identify the operating carrier
- Discarding airline messages after receiving a rebooking
- Claiming all travel losses as if they were care expenses
- Sending blurry screenshots without the flight number or date
- Submitting a bank statement without an itemized receipt
- Ignoring the rejection's stated reason
- Uploading excessive passport or payment information
- Waiting until a possible limitation or ADR deadline is close
If you use a claims company, read its fee, authority, cancellation, and settlement terms first. It can't create missing evidence. You should also know whether it may receive communications or payment on your behalf.
Frequently asked questions
Is a boarding pass enough evidence for a delay claim?
Usually not. It helps prove that you were booked and traveled, but it doesn't normally show the final arrival delay, the cause, or your expenses. Pair it with the original itinerary, airline status records, and a dated timeline.
Do I need a photo of the airport display?
No. A display photo can corroborate the delay, but airline emails, app records, rebooking notices, and official arrival information may be more useful. Save several independent records when possible.
Does an airline apology guarantee compensation?
No. An apology may acknowledge that the flight was disrupted, but eligibility still depends on the route, arrival delay, applicable rule, and any exception. Ask for a specific explanation if the airline denies the claim.
What if I lost my boarding pass?
Submit the booking confirmation, payment receipt, check-in evidence, rebooking messages, and any other proof that you traveled. Ask the airline to confirm the passenger record or issue a travel statement.
How long do I have to file?
There isn't one worldwide deadline. Limitation periods vary by country, claim type, and dispute route. File promptly, check the rule for the flight's jurisdiction, and separately verify any ADR deadline.
Before submitting, open the original booking and airline messages, write down the scheduled and actual final-arrival times, and match every expense to an itemized receipt.