Five steps. Most issues resolve by step 3.
Airlines count on most passengers giving up after one ignored email. A structured complaint — with documentation, legal citations, and a clear escalation path — gets results. Follow these steps in order.
How to File a Complaint Against an Airline (Step by Step)
Updated October 2026
1
Document everything
Before you write a single word, gather your evidence. The stronger your documentation, the faster the resolution.
- —Screenshots of the cancellation or delay notification
- —Your booking confirmation and boarding pass
- —Any text messages or emails from the airline
- —Photos of the departure board showing the cancellation
- —Receipts for any expenses incurred (meals, hotel, transport)
- —Names of gate agents or customer service reps you spoke with
- —Timestamps — when you were notified, when you requested a refund
2
Send a complaint letter to the airline
A formal letter gets taken more seriously than a phone call. It creates a paper trail and puts the airline on notice that you know your rights. Your letter should cite the specific DOT regulation (14 CFR Part 260 for refunds), state the exact amount you're requesting, and give a 14-day deadline.
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Wait 14 days
Give the airline 14 days to respond to your complaint letter. Most airlines have customer relations teams that process written complaints within this window. If they respond with a resolution you accept, you're done. If they refuse, offer only vouchers when you asked for cash, or don't respond at all — move to step 4.
4
File a DOT complaint
The Department of Transportation takes airline complaints seriously. Every complaint is forwarded to the airline, which must respond. Complaints become part of the airline's public record and affect compliance ratings.
File here:
airconsumerprotection.dot.govInclude your flight details, what happened, what you requested, how the airline responded (or didn't), and attach your complaint letter and any documentation. The airline must acknowledge within 30 days and respond substantively within 60 days.
5
Consider a credit card chargeback
If the airline still won't refund you after the DOT complaint, contact your credit card issuer and dispute the charge. Under the Fair Credit Billing Act, you can dispute charges for services not rendered. Provide all your documentation: cancellation proof, refund request, airline's refusal, DOT complaint confirmation, and 14 CFR Part 260.
You have 60 days from the statement date to file. The chargeback process takes 30-90 days. Most issuers side with the cardholder when the service was clearly not provided.
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Frequently asked questions
How do I file a DOT complaint?
Go to airconsumerprotection.dot.gov and select your complaint category (refund, cancellation, baggage, etc.). Fill in your flight details, describe what happened, what you've already tried, and what resolution you want. Attach any supporting documents — screenshots of cancellations, refund request emails, airline responses. The DOT assigns a case number and forwards your complaint to the airline, which is required to respond.
What happens after I file a DOT complaint?
The DOT forwards your complaint to the airline. The airline must acknowledge it within 30 days and provide a substantive response within 60 days. The DOT does not mediate individual disputes, but it tracks all complaints and uses them for enforcement decisions, rulemaking, and compliance monitoring. Your complaint becomes part of the airline's public record. Many airlines resolve issues quickly once a DOT complaint is filed — it's cheaper than dealing with enforcement.
How long does it take to resolve an airline complaint?
A well-written complaint letter sent directly to the airline typically gets a response within 7-14 days. If you file a DOT complaint, airlines must respond within 60 days but often respond within 1-2 weeks. A credit card chargeback takes 30-90 days. In total, if you follow the full escalation path (letter → DOT → chargeback), expect the process to take 1-3 months from start to resolution.
Is it worth filing a DOT complaint?
Yes. The DOT received over 100,000 airline complaints in 2025, and airlines take them seriously because they affect compliance ratings, trigger investigations, and become public record. Even if the DOT doesn't resolve your individual case, the complaint creates pressure on the airline. Many passengers report that their refund was processed within days of filing a DOT complaint, after weeks of being ignored by the airline directly.