What are extraordinary circumstances in EU261?

What counts as an extraordinary circumstance?

The regulation does not write a definition into its articles. The guidance sits in the recitals that explain the act: obligations on operating air carriers should be limited or excluded where an event has been caused by extraordinary circumstances which could not have been avoided even if all reasonable measures had been taken. [1] The same recital says such circumstances may, in particular, occur in cases of political instability, meteorological conditions incompatible with the operation of the flight concerned, security risks, unexpected flight safety shortcomings and strikes that affect the operation of an operating air carrier. [1] Because the wording is "may, in particular", the list works as illustration: an airline still has to bring its case within the general test. [1]

Each listed example carries its own qualifier, and the qualifiers matter. The weather example is not weather in general but meteorological conditions incompatible with the operation of the flight concerned; the technical example is limited to unexpected flight safety shortcomings; and the strike example is limited to strikes that affect the operation of an operating air carrier. [1] A circumstance that fails to match the qualifier is not brought within the recital by the label alone.

Air traffic management gets its own recital. Extraordinary circumstances should be deemed to exist where the impact of an air traffic management decision in relation to a particular aircraft on a particular day gives rise to a long delay, an overnight delay, or the cancellation of one or more flights by that aircraft, even though all reasonable measures had been taken by the carrier concerned to avoid the delays or cancellations. [1] That wording is narrow: the decision is tied to a particular aircraft and a particular day, and the measure is deemed rather than argued case by case. [1]

When does the defence block compensation?

Article 5(1)(c) gives passengers of a cancelled flight a right to compensation under Article 7 unless one of three notification windows applies. [1] Article 5(3) then adds the separate ground: the operating air carrier is not obliged to pay compensation if it can prove that the cancellation was caused by extraordinary circumstances which could not have been avoided even if all reasonable measures had been taken. [1] The verb is "prove", and Article 5(4) places the burden of proof on the carrier for the related question of whether and when the passenger was informed of the cancellation. [1]

The amounts at stake are set by Article 7(1), and Article 7(3) requires payment in cash, by electronic bank transfer, bank orders or bank cheques, or in travel vouchers and other services only with the passenger's signed agreement. [1]

Where the carrier re-routes the passenger to the final destination on an alternative flight that arrives within two, three or four hours of the original scheduled arrival, depending on the distance bracket, it may reduce that compensation by 50%. [1]

The three notification windows sidestep the question of fault altogether. [1]

Delay sits in a different article. Article 6 requires the carrier to offer assistance once a delay is expected to reach two hours for flights of 1,500 km or less, three hours for intra-Community flights over 1,500 km and other flights between 1,500 and 3,500 km, and four hours for longer flights, and that article does not itself refer to Article 7 compensation. [1] How the delay route works in practice is set out in the EU261 delay and cancellation guide.

Does the defence cancel the duty of care?

No. Article 5(3) disapplies only the obligation to pay compensation under Article 7. [1] For a cancellation, Article 5(1) still requires the carrier to offer assistance in accordance with Article 8, and assistance in accordance with Article 9(1)(a) and 9(2), plus hotel accommodation and transfers where re-routing is expected to depart at least the day after the originally planned departure. [1] Article 8 gives the passenger a choice between reimbursement of the full ticket cost within seven days, re-routing at the earliest opportunity, or re-routing at a later date at the passenger's convenience subject to seat availability. [1]

Article 9 sets out what care means: meals and refreshments in reasonable relation to the waiting time, hotel accommodation where one or more nights become necessary, transport between the airport and the place of accommodation, and two telephone calls, telex or fax messages, or e-mails, all free of charge. [1] The carrier must pay particular attention to persons with reduced mobility and anyone accompanying them, and to unaccompanied children. [1] This separation between money and care is the reason a traveller can be owed a hotel room while owing nothing in compensation — see duty of care.

The regulation also preserves other routes to recovery. It applies without prejudice to a passenger's right to further compensation, and the compensation paid under it may be deducted from such compensation. [1] Separately, a carrier that has paid compensation or met its other obligations may seek reimbursement from any person, including third parties such as a tour operator with whom it has a contract. [1]

Exceptions and limits

• Care can be trimmed. Care for passengers awaiting an alternative or delayed flight may be limited or declined if providing it would itself cause further delay. [1]
• Contract terms cannot waive it. Obligations towards passengers may not be limited or waived, notably by a derogation or restrictive clause in the contract of carriage, and a passenger who accepted inferior compensation after not being correctly informed of their rights may still go to the competent courts or bodies for the balance. [1]
• Where the regulation applies. It covers passengers departing from an airport in a Member State, and passengers departing from a third-country airport to an airport in a Member State on a Community carrier unless they received benefits or compensation and were given assistance in that third country. [1] It reaches tickets issued under a frequent flyer programme or other commercial programme of a carrier or tour operator, but not passengers travelling free of charge or at a reduced fare not available directly or indirectly to the public, and it applies only to transport by motorised fixed wing aircraft. [1]
• What "cancellation" means. The regulation defines a cancellation as the non-operation of a flight that was previously planned and on which at least one place was reserved, so the defence is reached only once a flight has been cancelled on that definition. [1]
• Different jurisdictions. The provisions described here are those of Regulation (EC) No 261/2004 as published by the European Union. [1] The UK Civil Aviation Authority publishes its own passenger guidance for people whose flights are delayed or cancelled [2]; the two frameworks are set side by side in EU261 versus UK261 compared, and the UK rules are explained in the UK261 air passenger rights guide.

Frequently asked questions

Who has to prove that extraordinary circumstances caused the cancellation?

The airline. Article 5(3) relieves the operating air carrier only if it can prove that the cancellation was caused by extraordinary circumstances which could not have been avoided even if all reasonable measures had been taken. [1]

Can an airline refuse both compensation and help?

No. Article 5(3) refers only to compensation under Article 7, while Article 5(1) continues to require assistance under Article 8 and care under Article 9. [1]

Does bad weather automatically count?

The regulation's example is meteorological conditions incompatible with the operation of the flight concerned, not weather in general, and the example still has to satisfy the general test in Article 5(3). [1]

What if the airline told me early enough?

If the notice and re-routing conditions in any of the three Article 5(1)(c) windows are met, the compensation right does not arise at all, whatever the reason for the cancellation. [1]

Related pages

Guides: EU261 flight delay and cancellation compensation, EU261 versus UK261 compared, UK261 air passenger rights. Glossary: duty of care, all frequent flyer terms.

Sources

Sources accessed on 18 October 2026. No airline loyalty programme terms are covered here, and neither are the decisions of individual courts or national enforcement bodies. For how the compensation rules work on a booking, see the EU261 guide.

1. Regulation (EC) No 261/2004 on compensation and assistance to air passengers, EUR-Lex, checked 18 October 2026
2. UK Civil Aviation Authority, flight delays and cancellations, checked 18 October 2026