How to escalate a flight complaint to the regulator

How do you write the claim to the airline?

In the EU you should always send the complaint to the airline first, using the complaint form the airline itself provides [1]. The airline must also hand you a written notice setting out the compensation and assistance rules if you were denied boarding, if your flight was cancelled, if you were delayed more than two hours at departure, or if you arrived at your final destination with a long delay [1]. That notice belongs in your file.

Keep receipts. If assistance was not offered and you paid for refreshments, food, accommodation or transport between a hotel and the airport yourself, the airline should reimburse expenses that were necessary, reasonable and appropriate [1].

Checked baggage has a separate written claim: within 7 days for a lost or damaged bag, or within 21 days of receiving a delayed bag, and there is no standard EU-wide form [1].

In the United States, the Department of Transportation (DOT) requires airlines that fly to, from or within the country to state on their websites how and where complaints can be submitted, and a web form may be offered [5]. It is often best to email or write to the airline's consumer office at its corporate headquarters [5].

Which regulator do you escalate to?

Each market has its own body, its own window and its own evidence standard, so the steps do not transfer between them.

How do you escalate in the European Union?

EU air passenger rights apply to flights within the EU operated by an EU or a non-EU airline, to flights arriving in the EU from outside operated by an EU airline, and to flights departing the EU for a non-EU country operated by either [1]. The EU means the 27 EU countries, including Guadeloupe, French Guiana, Martinique, Mayotte, Réunion, Saint Barthélemy, Saint-Martin, the Azores, Madeira and the Canary Islands, but not the Faeroe Islands; the rules also apply to flights to and from Iceland, Norway and Switzerland [1]. They do not apply where you have already received compensation, re-routing or assistance under the relevant law of a non-EU country for that journey [1].

If the airline does not reply within two months, or you are not satisfied with the reply, lodge a complaint with the national authority in the country where the incident took place, within a reasonable timeframe [1]. You can also contact your local European Consumer Centre for advice [1], and if the airline gives no satisfactory explanation for a disruption it calls extraordinary, contact the national authority for further assistance [1].

How do you escalate in the United Kingdom?

The UK Civil Aviation Authority tells consumers they have important legal rights when a booked flight is delayed or cancelled, and its passenger guidance covers rights, delays, cancellations, luggage problems, travel disruptions and airline complaints [2].

How do you escalate in the United States?

DOT asks passengers to give the airline a chance to resolve the problem first; airport customer service representatives can often deal with routine claims on the spot [5]. If the problem cannot be resolved at the airport, file a complaint with the airline, and if that does not satisfy you, file with DOT [5].

Disability and discrimination complaints are forwarded by DOT to the airline, which must respond to you and to DOT, after which DOT reviews the case and mails you an analysis of its findings [5]. For other complaints, DOT directs the airline or ticket agent to respond to you and to copy DOT; DOT does not investigate every complaint and instead runs targeted or sample reviews, and complaints can lead to enforcement action or rulemaking [5]. Safety concerns go to the Federal Aviation Administration and security concerns to the Transportation Security Administration [5].

When do you take an airline to small claims or court?

In the EU you can present a claim for compensation under EU rules through the European Small Claims procedure [1]. For flights operated by an EU airline, the claim can be submitted at the place of arrival or departure, and the same applies to connecting flights that form part of a single reservation but are operated by different carriers; you may also bring the matter before the courts in the country where the airline is registered [1]. Where the airline is not registered in an EU country, the case can go to the courts in the EU country where your flight arrived, departed or connected [1].

The time limit for bringing an action against an airline in a national court is defined by national rules on the limitation of actions in each EU country, so the filing window depends on the country you sue in rather than on a single EU-wide date [1].

What limits and exceptions apply?

• Outbound and return flights are always treated as two separate flights, even when booked as part of one reservation [1].
• Only the airline that operates the flight can be held responsible; where an airline hires an aircraft and crew from another airline under a wet lease, the hiring airline has operational responsibility and is the operating airline under Regulation 261/2004 [1].
• Extraordinary circumstances can remove the compensation. Examples given include air traffic management decisions, political instability, adverse weather conditions and security risks, while most technical problems that come to light during maintenance, a collision of mobile boarding stairs with an aircraft and strikes by the carrier's own staff are not extraordinary, and a strike external to the airline may be [1]. The airline must prove a link between the event and the disruption and that it could not have been avoided even if all reasonable measures had been taken [1].
• There is no compensation for a checked bag damaged by an inherent defect in the baggage itself [1], and no right to assistance if you were denied boarding on reasonable health, safety or security grounds or without the required travel documents, unless your ticket terms say otherwise [1].
• Access to alternative dispute resolution procedures in the EU is available to EU residents only [1], and aviation safety and security complaints are not handled by DOT's aviation consumer protection division [5].

Frequently asked questions

How long should you wait for the airline before escalating?

In the EU, no reply within two months is the trigger, and an unsatisfactory reply is the other [1]. In the United States, airlines must acknowledge a consumer complaint within 30 days and send a written response within 60 days [5].

Can you escalate before complaining to the airline?

The European Commission says you should always send the complaint to the airline first [1], and DOT asks passengers to give the airline a chance to resolve the problem before contacting it [5].

How long do you have to file a baggage claim in the EU?

In writing within 7 days for a lost or damaged checked bag, or within 21 days of receiving a delayed bag, with no standard EU-wide form [1].

Can any passenger use an EU alternative dispute resolution body?

No. Access to alternative dispute resolution procedures is only available to EU residents [1].

Where do you file a court claim against an EU airline?

At the place of arrival or departure for flights operated by an EU airline, including connecting flights under a single reservation operated by different carriers, or in the courts of the country where the airline is registered [1].

Related pages

Background on the rules behind these claims: EU261 flight delay and cancellation compensation and UK261 air passenger rights, alongside the US flight cancellation and refund guide. Other national regimes run their own tracks, including the Canada air passenger protection regulations guide. For expenses you paid out of pocket, see the travel insurance claims checklist, and for definitions see the frequent flyer glossary.

Sources

Sources accessed on 18 October 2026. National enforcement bodies, aviation ombudsmen and passenger-rights regimes outside the European Union, the United Kingdom and the United States are not covered here, and neither are individual airline conditions of carriage.

1. European Commission, Your Europe: air passenger rights, checked 18 October 2026
2. UK Civil Aviation Authority: flight delays and cancellations, checked 18 October 2026
3. US Department of Transportation: file a consumer complaint, checked 18 October 2026