How to File a DOT Complaint Against an Airline: Step-by-Step Guide

A DOT complaint creates an official record, notifies the airline, and feeds into the DOT's monthly Air Travel Consumer Report. Airlines face regulatory scrutiny when complaint volumes spike, which creates real incentive to resolve clear-cut cases.

The DOT enforces 14 CFR Part 259 (refunds and customer service commitments), 14 CFR Part 250 (denied boarding compensation), and 49 U.S.C. 41712 (unfair and deceptive practices). A complaint that cites a specific violation is more actionable than a general grievance. See the US passenger rights guide for the full regulatory framework.

Free and fast: Filing a complaint costs nothing and typically takes 10 minutes. You can file even after the airline has refused to resolve your issue directly.

File online at transportation.gov/airconsumer using the Air Consumer Division complaint portal. The portal is the fastest and most trackable method.

You can also file by mail to the DOT Office of Aviation Consumer Protection, but the online portal is strongly preferred because it routes complaints directly to the relevant airline team and creates a searchable record.

The more specific your complaint, the more actionable it is. Include:

1. 1

   Airline name, flight number, departure date, and full route (origin and destination)

2. 2

   Your booking confirmation number and ticket number

3. 3

   The type of violation: refund denied, bumping compensation unpaid, undisclosed fees, etc.

4. 4

   The specific regulation you believe was violated, if you know it

5. 5

   A factual description of what happened, in chronological order

6. 6

   Copies of supporting documents: boarding pass, booking confirmation, receipt, and any correspondence with the airline

Cite the rule: Example: 'The airline denied my refund for a flight it canceled in violation of 14 CFR 259.5, which requires cash refunds within 7 business days for credit card payments.'

The DOT sends you an acknowledgment email and forwards your complaint to the airline with a request for a response. The airline typically responds within 60 days. DOT staff review complaints for legal violations and patterns of misconduct.

Individual complaints do not automatically generate compensation payments to you. But when patterns emerge, the DOT opens enforcement investigations that can result in civil penalties. For more on outcomes, see DOT complaint outcomes explained.

A DOT complaint works best as part of a multi-step strategy:

• ›

  File the DOT complaint to create an official record

• ›

  Simultaneously request a cash refund directly from the airline (or use TravelStacks for $19)

• ›

  If the airline owes you a specific statutory amount (bumping, refund), consider small claims court if the airline refuses

• ›

  If you paid by credit card, a chargeback may be available in parallel

For DOT refund timelines: credit card refunds must be issued within 7 business days; other payment methods within 20 calendar days. If the airline is past these deadlines, say so explicitly in your complaint.

If the airline involuntarily bumped you and refused to pay the statutory bumping compensation, include that in your complaint. DOT enforcement on bumping is straightforward because the amounts are defined by regulation.

Attach the IDB compensation statement the airline is required to provide. If they did not give you one, note that in the complaint as an additional violation.

For an overview of all your rights on US flights, see the US passenger rights guide.