UK261 Extraordinary Circumstances Case Law

UK261 extraordinary circumstances cases center on Article 5(3) of the retained EU261 regulation: airlines can avoid cash compensation if the disruption was caused by "extraordinary circumstances which could not have been avoided even if all reasonable measures had been taken." The defense does NOT block duty of care (meals, hotels, rebooking).

Extraordinary circumstances must be external, unavoidable, and specific to your flight. Generic "weather" or "crew" is not sufficient. The airline must prove the specific circumstance that made this specific flight unavoidable.

Cases where extraordinary circumstances has been accepted:

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  Severe widespread weather events affecting the airport system (major storms, volcanic ash, hurricane closures).

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  Air traffic control strikes by third parties (not airline staff).

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  Airport closure for security reasons.

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  Bird strikes causing aircraft damage (Pešková v Travel Service, C-315/15).

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  Unruly passenger behavior requiring diversion (in narrow circumstances).

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  Sudden security lockdowns by government authorities.

Cases where extraordinary circumstances was rejected:

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  Airline-internal strikes (pilots, cabin crew) per Krüsemann v TUI (C-195/17).

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  Routine mechanical issues per Wallentin-Hermann v Alitalia (C-549/07).

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  ATC flow control, because it's within the airline's normal operational chain per Ruijssenaars v Travelport (C-94/14).

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  Crew timing out from normal operations.

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  Aircraft repositioning issues.

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  Low load factor cancellations.

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  Scheduling conflicts.

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  Cleaning or deicing delays.

Krüsemann is the most important anti-airline ruling. The ECJ held airline-internal strikes are part of the airline's operational sphere and not extraordinary. Airlines routinely over-claim strike defense; cite Krüsemann.

UK courts have continued to follow retained EU case law through the Brexit transition. In 2023 and 2024, the UK Court of Appeal has generally maintained alignment with ECJ precedent. Divergence is possible but limited to date. Notable UK rulings:

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  Crew sickness: UK courts have held this is NOT extraordinary, aligning with EU law.

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  Mechanical issues: UK courts follow Wallentin-Hermann; not extraordinary.

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  Airport strikes by third parties: UK courts have upheld extraordinary (aligning with EU).

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  Sequential delays affecting connections: UK courts have held the airline responsible for the initial delay in the chain.

Airlines frequently over-claim extraordinary circumstances. To counter:

1. 1

   Demand specificity: "The airline must identify the specific circumstance, prove it was external and unavoidable, and show reasonable measures were taken."

2. 2

   Cite case law: Krüsemann for internal strikes, Wallentin-Hermann for mechanical, Pešková for bird strikes.

3. 3

   Check for other flights that operated: if your flight was cancelled but other flights to same destination operated same day, the circumstance was not generalized.

4. 4

   Demand documentation: the airline must provide evidence of the extraordinary circumstance (weather advisories, strike notices, security reports).

5. 5

   Escalate to UK CAA or ADR: which frequently rule in passengers' favor on over-claims.

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  2024 winter storms: UK CAA accepted extraordinary for severe widespread events, rejected for ordinary fog or light snow.

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  2025 spring baggage handler strikes at LHR: extraordinary for third-party ground ops strike.

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  2025 summer BA crew action: NOT extraordinary per Krüsemann; BA paid out millions in cash compensation.

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  Continuing ATC flow issues: NOT extraordinary, per Ruijssenaars alignment.

For companion UK261 guides see Manchester UK261 claim step by step, UK261 passenger rights 2026 guide, and UK261 duty of care meals and hotels.

For the pillar see UK261 Passenger Rights. TravelStacks handles UK261 claims at 25 percent of recovery and pushes back on over-claims. Start a claim in 30 seconds.

For primary regulatory texts and official guidance cited in this guide, see UK CAA Passenger Rights, Regulation (EC) No 261/2004 as retained.