For a U.S. airline delay or cancellation, start with the airline. At the airport, use the airline's desk, app, text service, or phone line to deal with urgent travel. Once the immediate problem is under control, send a written complaint to the airline's customer relations team. Keep the case number and every document you receive.

The FAA does not handle ordinary airline service complaints. Its airline service complaint guidance directs passengers to the U.S. Department of Transportation's Aviation Consumer Protection office.

This article focuses on U.S. consumer options. A flight departing from or arriving in the United Kingdom, European Union, or Canada may also be covered by that jurisdiction's rules, so don't assume the U.S. process is the only one that applies.

Decide what you want before you complain

Airlines can respond more usefully to a specific request than to a general account of how frustrating the disruption was. You might be asking for:

• A refund: You no longer want to travel after the airline canceled the flight or made a significant change.
• Rebooking: You still need to travel and want the airline to arrange another itinerary.
• Expense reimbursement: You want the airline to consider meals, lodging, transportation, or other costs you paid during the disruption.
• Additional compensation: You want money beyond a ticket refund or reimbursement. An ordinary U.S. flight delay doesn't automatically create a cash-compensation claim.
• An explanation or correction: You want the airline to explain a refusal, fix a billing or baggage problem, or review how the disruption was handled.

A refund and a travel credit aren't the same thing. When the airline cancels a flight or makes a significant change, state that you want a refund if you don't want the replacement itinerary. Ask about the consequences before accepting a voucher or alternative flight. A voluntary cancellation because your plans changed is generally governed by the ticket's fare rules instead.

Contact the right party

The airline operating the flight

For a same-day delay, cancellation, missed connection, or baggage problem, contact the airline operating the affected flight. Ask the representative to record your request and give you a case number.

The airline that sold the ticket may not be the airline operating the aircraft. When the two are different, contact both. The operating carrier may control immediate rebooking, while the ticketing airline or travel agency may handle payment, ticket changes, or a refund.

Customer relations

An airport agent may be able to get you moving, but customer relations is usually the better place for a post-trip review. Use the airline's online complaint form, email address, or mailing address. Written contact gives you a record and makes it easier to attach notices and receipts.

Keep the request short and identify the remedy you want. For example:

On [date], flight [number] from [departure airport] to [arrival airport] was [delayed or canceled]. I was offered [rebooking, credit, or no alternative]. I am requesting [a refund, reimbursement, a written explanation, or a review]. Please identify the policy that applies and respond in writing.

A travel agency or booking platform

If an agency or booking platform issued the reservation, notify it too. Save both reference numbers. Contacting the airline does not necessarily open a case with the agency, and contacting the agency does not necessarily create a customer-relations complaint with the airline.

DOT Aviation Consumer Protection

Use the DOT Aviation Consumer Protection complaint route when the airline doesn't resolve the matter, rejects your request without explaining why, or fails to follow an obligation it has stated applies. The FAA's guidance points passengers to DOT for this type of complaint.

DOT is an oversight escalation, not a same-day rebooking service. Keep working with the airline if you still need to travel.

When the airline cancels or significantly changes the flight

Before buying a replacement ticket, save the original itinerary, the cancellation or change notice, and the alternatives the airline offered. Then ask two direct questions:

1. Can the airline rebook you on its own service or another carrier?
2. If you don't want the replacement, can you request a refund instead?

U.S. DOT refund protections may apply when an airline cancels a flight or makes a significant change and the passenger doesn't accept the alternative transportation. The result can depend on the itinerary, what changed, and whether you accepted or used the replacement.

If you choose to travel on the new itinerary, save its confirmation. Ask what happens to paid seats, checked bags, upgrades, and other extras, as well as any unused portion of the original ticket.

Don't describe an airline cancellation as a voluntary cancellation just because the ticket was nonrefundable. Explain that the airline canceled the service and ask it to review the request as an airline-initiated disruption.

When the flight is delayed or you miss a connection

A delay doesn't automatically produce a cash payment in the United States. The airline's policy, the reason for the disruption, the itinerary, a denied-boarding situation, or travel insurance may change the answer.

At the airport, ask for the current cause and the expected departure time. When a connection is at risk, ask the airline to protect the full itinerary, not just the next flight segment. Also ask whether its published customer-service commitments cover a meal, hotel, ground transportation, or a fee waiver.

Get approval before paying for an expensive hotel, replacement ticket, or private transportation. Keep the receipts anyway, even when an agent says reimbursement is unlikely. If you decide to abandon the trip, ask how leaving will affect the remaining segments before you go.

Weather, air-traffic-control restrictions, staffing, aircraft problems, and crew scheduling can be treated differently under airline policies. The stated cause may affect rebooking, meals, lodging, or reimbursement, but it doesn't settle every possible remedy. Ask the airline to identify the cause in writing.

Special situations

Denied boarding

There is a difference between volunteering to give up your seat and being denied boarding against your wishes. If you volunteer, ask for the terms of the agreement before accepting them. If the airline denies boarding involuntarily, request the written notice explaining the decision and any rights that apply.

Keep your boarding pass, proof that you checked in on time, and a record of what the airline offered.

Tarmac delays

For a lengthy delay while passengers remain on the aircraft, write down when the plane stopped, when the doors opened or closed, and what the crew said about the cause. Note any concerns involving food, water, medical needs, or restroom access. Tarmac delays have separate federal requirements, so a clear timeline matters when you complain.

Baggage

Report missing or damaged baggage to the airline before leaving the airport when possible. Keep the report number, baggage tags, photographs, and receipts for necessary purchases. Baggage claims are separate from delay and cancellation complaints, even when all the problems occurred on one trip.

What controls the claim

The airline's broader industry conditions don't decide your individual refund or reimbursement request. Capacity forecasts, mergers, alliances, sustainable aviation fuel, premium cabins, loyalty programs, and artificial-intelligence tools may affect schedules or service, but they don't answer whether your ticket qualifies for a refund.

The useful facts are narrower:

• Which airline issued the ticket and which airline operated the flight
• What the ticket and conditions of carriage say
• Whether the airline or passenger canceled the trip
• The reason and length of the disruption
• Whether you accepted a replacement flight or credit
• Where the flight departed and arrived
• What evidence you can provide
• Whether travel insurance or a card benefit applies separately

Frequent-flyer status or a premium cabin may change the service offered under program terms. It doesn't replace the rules governing refunds and complaints.

Save the evidence

Put the records in one folder before filing. Include the booking confirmation and ticket number, boarding passes, baggage tags, original and revised schedules, and all cancellation or delay notices. Screenshots of the airline's app, chat, or offer can be useful when the information later disappears.

Also save:

• Names of representatives
• Airline and agency case numbers
• Receipts for meals, lodging, transportation, and replacement purchases
• Photos of airport notices or damaged baggage
• The date and time you asked for help
• A sentence stating the outcome you want

Write a timeline while the details are fresh. Include scheduled and actual departure and arrival times, missed connections, what the airline offered, and anything you accepted.

Escalate without losing the record

Give the airline a fair opportunity to review the complaint through its stated customer-service process. If it refuses your request, ask why and request the policy section it relied on. One concise follow-up with the missing evidence is usually more useful than sending several general messages.

If the airline still doesn't resolve the issue, file with DOT Aviation Consumer Protection through the route identified in the FAA guidance. Include the itinerary, airline case number, your written complaint, the airline's response, and the remedy you requested. Keep copies and don't send original documents that can't be replaced.

Travel insurance is a separate process. Contact the insurer directly and check its claim deadline. The insurer may require proof of the disruption and receipts even after the airline has responded.

Common questions

Can I complain to the FAA about an airline delay?

For an ordinary airline service complaint, the FAA directs passengers to the DOT Aviation Consumer Protection office. Contact the airline first if you need rebooking or refund help.

Does every U.S. flight delay qualify for compensation?

No. A delay alone doesn't automatically create a right to cash compensation. Review the airline's policy, the cause and length of the disruption, the itinerary, and any separate rule or insurance coverage that may apply.

Should I accept an airline voucher?

Only after checking whether you would prefer a refund or continued travel. A voucher may suit your plans, but accepting a credit or replacement itinerary can affect how the airline handles a later refund request.

What if the airline ignores my complaint?

Keep proof of the submission, send one concise follow-up, and then use the DOT Aviation Consumer Protection complaint route. While that review is pending, continue dealing with the airline about any immediate travel need.

Before you contact anyone, write down the flight number, date, disruption, and remedy you want. Attach the notice that started the problem and keep the case number with the rest of your records.