Extraordinary Circumstances EU261: When Airlines Can Deny Compensation
Airlines routinely cite "extraordinary circumstances" to deny EU261 compensation — often incorrectly. Technical faults and staff shortages do not qualify. Only genuinely unforeseeable external events may exempt the airline. Here is exactly what qualifies and how to challenge a wrongful rejection.
Quick answer
Qualifies: severe weather, ATC strikes, airport security closures, hidden manufacturing defects, volcanic ash. Does NOT qualify: technical faults, staff strikes (CJEU), overbooking, crew shortages, knock-on delays. Challenge rejections by asking for documentary proof and escalating to your national ADR body.
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Qualifying vs Non-Qualifying Events
| Event | Qualifies? | Notes |
|---|---|---|
| Severe weather (hurricane, blizzard, fog below minimums) | ✅ | Must be genuinely extraordinary — not routine bad weather. |
| Air traffic control strikes | ✅ | Third-party industrial action outside airline control. |
| Airport security alert / closure | ✅ | Genuine security threats, not operational slowdowns. |
| Bird strike causing aircraft damage | ✅ | Accepted as extraordinary — unpredictable and unavoidable. |
| Hidden manufacturing defect (not routine maintenance) | ✅ | Must be hidden — airlines must prove it was not detectable. |
| Routine technical failure / mechanical fault | ❌ | Standard maintenance issues are inherent to airline operations. |
| Airline staff strikes | ❌ | CJEU ruled airline own-staff strikes are NOT extraordinary (Krüsemann v TUIfly). |
| Staff shortage / crew rostering issues | ❌ | Operational issue — airline's own responsibility. |
| Aircraft swapped (different plane) | ❌ | Operational decision — airline's own responsibility. |
| Overbooking | ❌ | Never extraordinary — EU261 Article 4 explicitly covers denied boarding. |
| 'Knock-on' delay from previous flight | ❌ | Airlines cannot chain extraordinary circumstances across multiple rotations indefinitely. |
Frequently Asked Questions
What are 'extraordinary circumstances' under EU261?
EU261 Article 5(3) exempts airlines from paying compensation if a delay or cancellation was caused by extraordinary circumstances that could not have been avoided even if all reasonable measures had been taken. The Court of Justice of the EU (CJEU) has interpreted this narrowly: the event must be both (a) extraordinary by nature — not inherent to normal airline activity — and (b) unavoidable despite all reasonable measures. Airlines routinely misapply this exemption to events that do not qualify.
An airline cited 'technical issues' as extraordinary circumstances — is this valid?
Almost certainly not. The CJEU has consistently held that technical failures are inherent to airline operations and therefore cannot constitute extraordinary circumstances unless caused by a hidden manufacturing defect not detectable through normal maintenance. Routine mechanical faults, sensor failures, hydraulic issues, software glitches — all of these are part of running an airline and do not excuse compensation. Challenge any 'technical' rejection by citing CJEU case C-549/07 (Wallentin-Hermann).
Can airlines deny EU261 compensation for weather delays?
Only if the weather was genuinely extraordinary — conditions outside normal meteorological expectations that made flying impossible or unsafe. Routine thunderstorms, light snow, or seasonal fog do not qualify. A Category 5 hurricane, an unprecedented blizzard closing an airport, or volcanic ash (as in the 2010 Eyjafjallajökull eruption) can qualify. The airline must prove the specific weather directly caused your delay and that it could not have been avoided through pre-emptive measures like rebooking.
The airline said my delay was due to an ATC restriction — do I still get €400 or €600?
It depends on the type of restriction. ATC strikes by third-party controllers are genuine extraordinary circumstances. ATC slot restrictions due to airport congestion or capacity management are NOT extraordinary — they are a normal part of airline scheduling. If an airline cites ATC restrictions without specifying a genuine strike or force majeure event, challenge the rejection. Ask for documentary proof of the specific ATC measure and verify it against public records from Eurocontrol.
How do I challenge an extraordinary circumstances rejection?
Request the specific evidence: the airline must prove the extraordinary circumstance, not just assert it. Ask for the exact event name, date, time, and documentary proof (weather records, NOTAM, ATC confirmation). Then compare against public records (Eurocontrol CTOT data, METAR weather records, airport NOTAMs). If the evidence does not support the claim, escalate to your national ADR body: SÖP (Germany), Médiateur (France), Geschillencommissie (Netherlands), CEDR (UK), OmbudsMan Voyages (Belgium), AESA (Spain), ENAC (Italy). ADR bodies are experienced in identifying invalid extraordinary circumstances claims.
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