Guide
Last updated September 30, 2026
A cancelled flight complaint tends to arrive at the airline in one of two forms: a long message about how the whole trip was ruined, or a short one that states exactly what happened and what should happen next. Only the second kind gets handled quickly, because it's the only one a customer service rep can actually act on without reading it twice.
Flight number, scheduled departure time, the actual departure or cancellation time, and whatever the gate staff or app told you and when. Take a photo of the departure board if you can. Airline apps have a habit of quietly rewriting the history once a flight is rebooked, so the screenshot you take in the moment is often the only record that the original delay ever happened the way it did.
It's tempting to drop in a number you saw in a forum post about what you're "owed." Resist it. Compensation rules for cancelled and delayed flights differ by country, by airline, and by the specific reason the flight didn't go, and getting the figure wrong hands the airline an easy way to dismiss the whole letter with a form reply correcting your citation instead of addressing your complaint. If you believe a specific compensation scheme applies to your flight, say that you're aware such a scheme may apply and ask the airline to confirm and apply it, rather than stating an amount as fact. Look up the rules that actually govern your route and carrier, or ask the airline directly, before you put a number in writing.
These are two different asks and mixing them muddies both. Out-of-pocket costs are the hotel, meals, or ground transport you paid for because of the delay, and those need receipts attached. The inconvenience itself, the missed connection, the ruined plans, is a separate and softer claim that a specific compensation policy may or may not cover. State the receipts claim plainly and attach the proof. Mention the inconvenience once, briefly, and let the airline's own policy decide what it's worth rather than naming a figure yourself.
Subject: Flight Complaint — Flight XY123, [Date], Cancelled/Delayed
1. Flight number, scheduled and actual times, and what you were told at the gate.
2. Whether you were rebooked, and how long that took.
3. Out-of-pocket costs, itemized, with receipts attached.
4. What you want: reimbursement, and confirmation of any compensation you may be entitled to under the airline's own policy.
Everything else, how the delay felt, what it cost you in missed time, can go in a sentence near the end. It gives the letter a human voice without burying the parts the airline actually needs to process the claim.
File within days rather than weeks. Gate agent notes and crew logs don't stick around forever, and an airline is far more likely to take a claim at face value when it arrives close to the date of travel than months later when nobody on their end can verify anything beyond what you've written.
You still need to gather the flight number, times, and receipts yourself. Once you have them, DraftMyComplaints turns a plain description of what happened into a properly structured letter, in whatever tone fits, ready to copy, email, or export as a PDF.
Draft my complaint now →