Extraordinary circumstances: when an EU airline does not have to pay

1 thing goes away when EU261 extraordinary circumstances apply: the fixed article 7 compensation. Article 5(3) lets the airline skip that payment only if it proves the cause was extraordinary and unavoidable even with all reasonable measures. Care under article 9, and your article 8 refund or re-routing, survive regardless. Most rejection letters blur that line.

Updated 23 Oct 2026·Sources checked 15 Sep – 12 Oct 2026·16 min read

#EU261 €What does 'extraordinary circumstances' mean in EU261?

0 definitions: EU261 article 5(3) names extraordinary circumstances without defining them, unlike UK261’s own two-limb text. What counts comes from CJEU case law applying 3 conditions: not inherent in the airline’s normal activity, beyond its actual control, and unavoidable even with all reasonable measures.

Source: EU261 art. 5(3) — eur-lex.europa.eu; CJEU C-549/07 Wallentin-Hermann, paras 22-27 — eur-lex.europa.eu, checked 2026-09-15; EU261 recitals 14-15 and Commission Interpretative Guidelines C/2024/5687, §5.1 — eur-lex.europa.eu, checked 2026-10-12.

The operative text stops at naming the exception, but the preamble gives examples. Recital 14 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.” Recital 15 adds air traffic management decisions that cause a long delay, an overnight delay or a cancellation for “a particular aircraft on a particular day”.

A recital guides the reading; it is not the test. The Commission’s 2024 Interpretative Guidelines say the recital 14 events “are not necessarily grounds for an exemption from the obligation to pay compensation, but require a case-by-case assessment”. UK261 closed the definition gap for UK flights in December 2023; this page covers only the EU text.

Not your situation? A flight departing a UK airport falls under UK261, in pounds. Routes to, from or within Canada fall under the Air Passenger Protection Regulations. Flying in the US? US federal rules differ — see US DOT rules. Unsure which law fits? Work it out here.

Ask the airline in writing to name the specific event, not just the category, before you accept or challenge a rejection.

#The three-part test, and who has to prove it

3 conditions decide it, read into article 5(3) by Wallentin-Hermann. The cause is not inherent in the airline’s normal activity, it is beyond the airline’s actual control, and it could not have been avoided even with all reasonable measures. The airline carries the burden on all three, not the passenger.

Source: EU261 art. 5(3) (“unless the carrier proves”) — eur-lex.europa.eu; CJEU C-549/07 Wallentin-Hermann, paras 23-27 — eur-lex.europa.eu, checked 2026-09-15; Commission Interpretative Guidelines C/2024/5687, §5.1 — eur-lex.europa.eu, checked 2026-10-12.

The Commission’s 2024 Guidelines split the same burden in two. The airline “must simultaneously prove” the event and its link to your delay or cancellation, and that the disruption could not be avoided even though it took all reasonable measures.

A refusal that names a cause has not yet proven one. On r/travel in February 2026, u/The_Pediatrician described a Paris-Chișinău flight delayed over 3 hours. The airline’s written answer was that the delay was due to “operational circumstances” (passenger report), with €50 per passenger in airline credit offered instead of the €400 the poster had worked out for the distance band. That phrase names no event at all, so none of the three conditions can even be tested against it. By May 2026 the same poster reported (passenger report): “also the French aviation authority couldn’t get a response” from the airline.

Ask specifically for the maintenance log entry, the air traffic control notice, or the strike announcement the airline relies on. A category label such as “operational” or “technical” is not one of those documents, and none of the three conditions can be checked against a label alone. Reply asking exactly what happened, when, and what the airline did to avoid it.

#List of extraordinary circumstances under EU261, event by event

18 of the 19 events below have a CJEU ruling or a Commission reading behind them; de-icing has neither. Problems caused by outsiders, such as airports, controllers or the weather, often qualify. Faults, crew absences and strikes inside the airline almost never do. Every “yes” still needs the airline’s proof for your flight.

Source: CJEU rulings named in the table; Commission Interpretative Guidelines C/2024/5687, §5.2.3 — eur-lex.europa.eu, checked 2026-10-12.

Two airport rows turn on whose system failed. In SATA International (C-308/21, 2022) the airport of origin ran the refuelling system, so its generalised breakdown was external. A refuelling problem handled together with the airline’s own staff can still be inherent. Touristic Aviation Services (C-405/23, 2024) treated an airport operator’s shortage of baggage loaders the same way, and still made the airline show measures appropriate to the situation.

“Can be” means the event passes the first two conditions, and the third, all reasonable measures, is still the airline’s to prove. Moens v Ryanair (C-159/18, 2019) is the one row where the court settled the third condition as well. Petrol on the runway that did not come from the airline’s own aircraft “must be regarded as a circumstance which could not have been avoided even if all reasonable measures had been taken”.

Find the row that matches the event your airline names, then ask for the document behind it.

#Technical faults: why most are not extraordinary

2 rulings block most technical-fault claims. Wallentin-Hermann held that a problem found during maintenance, or caused by a failure to maintain, is inherent in an airline’s normal activity, whatever triggered it. Van der Lans extended that to an unexpected part failure, before its average working life, missed at routine checks.

Source: CJEU C-549/07 Wallentin-Hermann, operative part; CJEU C-257/14 van der Lans, paras 36-44 — eur-lex.europa.eu, checked 2026-09-15.

One exception survives both rulings: a hidden manufacturing defect affecting flight safety, revealed by the manufacturer or a competent authority in aircraft already in service, can qualify, and so can damage from sabotage. That exception is narrow: it needs the manufacturer or a national aviation authority to have identified the defect in aircraft already in service, not merely the airline’s own engineer flagging a one-off fault after the fact. On r/travel in June 2026, u/DifferentDream7004 wrote that Iberia staff put a delayed connecting flight down to having “to pull a completely different plane to cover the route” (passenger report), while the written rejection said only “circumstances beyond our control.” The poster replied citing Wallentin-Hermann directly, on the basis that swapping in another aircraft is an ordinary operational choice, not a hidden defect.

Ask what specifically failed, and whether it was found during scheduled maintenance; either answer points straight back to Wallentin-Hermann or van der Lans.

#Weather, strikes and air traffic control

0 of the carrier’s own strikes pass the test. Airhelp v SAS held that a lawful strike by an airline’s own pilots stays internal to its activity, whatever the union’s demands. Strikes by air traffic controllers or airport staff differ: the same Grand Chamber judgment says they may be extraordinary, because they fall outside the airline’s activity.

Source: CJEU C-28/20 Airhelp v SAS, Grand Chamber, paras 42-43; Commission Interpretative Guidelines C/2024/5687, §5.2.3(i); CJEU C-108/26, judgment of 8 October 2026 (provisional text) — eur-lex.europa.eu, checked 2026-10-12.

On r/Ryanair in June 2026, u/Lukedf9 described Belgian air traffic controllers who “went on an unannounced strike between 12:00 and 19:00, affecting all airports in Belgium” (passenger report), cancelling their flight to northern Italy 7 hours before departure. Controllers are not the airline’s own staff, so the cause can qualify. The same holds for a French air traffic control strike, which can cancel flights that only cross French airspace. The airline still has to prove that no reasonable measure would have avoided your cancellation. What you keep whatever the answer is your refund, your re-routing and your care.

Air traffic management decisions changed on 8 October 2026. In C-108/26 the CJEU held that such a decision “cannot, in itself and irrespective of the reasons for it,” be an extraordinary circumstance. The court now examines, case by case, whether the event that caused the decision was outside the airline’s normal activity and beyond its control. It set aside a General Court answer that had treated these decisions as extraordinary whatever their reason.

A letter that cites “ATC restrictions” now has to name what lay behind the restriction, with the date, the airport and the time.

#When does weather excuse an airline under EU261?

8 October 2026 is the date of C-108/26, the CJEU’s clearest answer on weather. Conditions that stop a flight operating safely and on its planned schedule are not inherent in an airline’s activity and, as natural hazards, are beyond its control. Variable or even difficult weather is part of normal flying, and the airline must still prove reasonable measures.

Source: CJEU C-108/26, judgment of 8 October 2026 (provisional text); Pešková, C-315/15, operative point 4; AirHelp Germany, C-399/24 (provisional text); Commission Interpretative Guidelines C/2024/5687, §5.2.3(h) — eur-lex.europa.eu, checked 2026-10-12.

The case concerned departure slots delayed after airspace restrictions in Hungary and Romania, imposed because of adverse weather. The court tested the weather behind the restriction, not the restriction itself.

Weather rarely explains a whole delay. Under Pešková (C-315/15, 2017), when an arrival delay of 3 hours or more comes partly from an extraordinary event and partly from something that is not, the extraordinary part is deducted first. C-108/26 applied that rule to a weather-delayed slot followed by a technical fault. Say weather costs 90 minutes of a 4-hour arrival delay and the fault the rest: 2 hours 30 minutes count, short of 3 hours.

The Commission reads recital 14 the same way for busy airports. An airline “obliged to delay or cancel a flight at a congested airport due to bad weather conditions, including if these conditions result in capacity shortages” faces extraordinary circumstances, according to §5.2.3(h) of its 2024 Guidelines.

Lightning has its own ruling. In AirHelp Germany (C-399/24, 16 October 2025) a lightning strike on the aircraft that forced mandatory safety inspections, and so a late return to service, was extraordinary. We found no CJEU ruling on fog, snow, ice or a shortage of de-icing fluid; for those the general test applies. The weather cancellation guide compares the UK, Canadian and US rules.

Ask for the weather event, the airport and the hours, and how many minutes each cause added to your arrival.

#Is crew sickness an extraordinary circumstance under EU261?

No, and 1 case settled it at the hardest edge: a co-pilot found dead at 04:15, before a 06:05 Stuttgart-Lisbon departure. In TAP Portugal (C-156/22, 11 May 2023), the CJEU held that the unexpected absence of an essential crew member through illness or death, shortly before departure, is not an extraordinary circumstance.

Source: CJEU C-156/22 TAP Portugal (joined cases), operative part and paras 7-8, 23-24; Commission Interpretative Guidelines C/2024/5687, §5.2.2; CJEU C-195/17 Krüsemann — eur-lex.europa.eu, checked 2026-10-12.

The court looked at the absence, not the medical cause. It is “the very absence, due to illness or death, of one or more crew members, even if it was unexpected” that belongs to running an airline. A crew member who passed the regular medical examinations changes nothing. The Commission repeats the ruling in its 2024 Guidelines (§5.2.2).

Staff who walk out fare no better. A lawful strike by the airline’s own pilots stays internal (Airhelp v SAS, C-28/20), and so does a wildcat strike by its own crew (Krüsemann, C-195/17, 2018).

“Crew timed out” or “crew unavailable” names no cause at all. It may hide illness, which C-156/22 rules out, or a knock-on from an earlier event, which then has to be tested on that first event. Flights from a UK airport follow UK261, where the Supreme Court reached the same answer on illness; see the UK261 extraordinary circumstances guide.

Ask in writing why the crew member was missing. If the answer is illness, quote C-156/22 back and ask for the compensation.

#Can an EU airline blame a problem from an earlier flight?

3 flights back is how far the chain can reach. The Commission’s 2024 Guidelines (§5.4), citing Austrian Airlines (C-826/19), accept an extraordinary event at the aircraft’s turnaround three flights earlier in its rotation, if a direct causal link runs to your delay. TAP Portugal (C-74/19, 2020) set that direct-link test for the previous flight.

Source: CJEU C-74/19 TAP Portugal, operative points; C-826/19 Austrian Airlines, para 57; C-108/26 (8 October 2026, provisional text); C-294/10 Eglītis & Ratnieks; Commission Interpretative Guidelines C/2024/5687, §5.3-5.4 — eur-lex.europa.eu, checked 2026-10-12.

C-108/26 restated the rule for air traffic management decisions. The event must have hit a previous flight operated with the same aircraft, and the link is judged “taking into account, inter alia, the conditions of operation of the aircraft”.

The same TAP Portugal ruling limits the excuse once the event is over. Re-routing you on the airline’s own flight the next day is not a reasonable measure if a flight arriving earlier existed. That covers direct and indirect options, on the airline’s own flights or another carrier’s. The exception is an intolerable sacrifice for the airline.

Eglītis & Ratnieks (C-294/10, 2011) requires reserve time planned so the airline can still operate once the event ends, assessed case by case. The Commission notes that airlines “will generally have more resources available at their home base compared to outbound destinations, giving them more possibilities to limit the impact of extraordinary circumstances.”

Ask for the earlier flight numbers, what disrupted them and how many minutes passed on to yours. If you were moved to the next day, name an earlier flight on any airline and ask why it was not offered.

#What the airline still owes you even when it is excused

2 duties survive a proven extraordinary circumstance: care under article 9, and your article 8 choice between reimbursement and re-routing. Article 5(3) exempts only “compensation in accordance with Article 7”, and names nothing else; articles 8 and 9 are not qualified by it at all.

Source: EU261 art. 5(1), 5(3), 8 and 9 — eur-lex.europa.eu, checked 2026-09-15; CJEU C-12/11 McDonagh, operative part; Commission Interpretative Guidelines C/2024/5687, §6.3 — eur-lex.europa.eu, checked 2026-10-12.

McDonagh (C-12/11, 2013) tested this during the Eyjafjallajökull airspace closure: extraordinary circumstances “do not release air carriers” from the duty to provide care. Costs you paid yourself come back only if they were “necessary, appropriate and reasonable”. The Commission adds that the Regulation has no separate category of “particularly extraordinary” events, so care stays owed however long the disruption lasts.

Care means meals and refreshments in proportion to the wait, 2 free calls or emails, and a hotel with transport to it once an overnight stay is needed. Article 9 sets no euro ceiling on any of it, and the hotel runs for as many nights as the disruption actually needs. None of that depends on whether the excuse holds up. Reimbursement or re-routing under article 8 is the same choice covered on the refund or voucher page, and it applies whatever caused the cancellation (Flight schedule change compensation 14 days).

An airline that refuses a hotel on an overnight delay, citing the same weather it used to refuse compensation, is wrong about the hotel even if it is right about the compensation.

Ask for care and re-routing in writing, separately from the compensation question, and keep every receipt if the airline arranges nothing itself.

#How to challenge a refusal you think is wrong

4 weeks of silence is enough in Norway, 6 in Portugal and Austria, 8 in Cyprus: each country sets the wait before its enforcement body will take a complaint, because EU261 fixes none. Write to the airline first for the specific cause and the measures it took, then take an unproven excuse to that body under article 16(1).

Source: EU261 art. 16(1)-(2) (enforcement); European Commission, National Enforcement Bodies list, updated 27 August 2026; national complaint windows from each body’s own page — eur-lex.europa.eu, transport.ec.europa.eu, reiselivsforum.no, anac.pt, apf.gv.at, mcw.gov.cy, checked 2026-09-18; Commission Interpretative Guidelines C/2024/5687, §5.1 — eur-lex.europa.eu, checked 2026-10-12.

Ask for the proof itself, not a summary of it. The Commission’s 2024 Guidelines say an airline may rely on logbook extracts, incident reports or external documents. It should provide such proof “free of charge” to the enforcement body and to passengers, in line with national rules on access to documents. That is the Commission’s view, not binding law, but it is a fair request to quote.

Match the letter’s wording to the list above before you escalate an extraordinary circumstances EU261 refusal. For a flight into the EU from a third country, the arrival state’s body is competent instead of the departure state’s. The Commission’s own list names the competent body for all 27 EU states plus Iceland, Norway and Switzerland, so check that list before assuming which one applies to your route.

If the airline named a technical fault, a strike by its own staff, or gave no specific event at all, AirHelp (third-party claim service) can take the claim on, no win no fee, and keeps a fee from any payout. The free complaint route above stays open.

Do it yourself · freeClaim with the airline, then the regulator

• Write to the airline and keep the reference
• Refused: the enforcement body of the country you left, free
• You keep all of the compensation

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• They deal with the airline for you
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General information on EU261 extraordinary circumstances, not legal advice. For your specific case: the national enforcement body of your departure country, the European Consumer Centre network or a solicitor.

#Sources

• Regulation (EC) No 261/2004, arts. 5, 7, 8, 9, 16 — eur-lex.europa.eu, checked 2026-09-15.
• Wallentin-Hermann, C-549/07 (2008), CJEU — eur-lex.europa.eu.
• van der Lans, C-257/14 (2015), CJEU — eur-lex.europa.eu.
• Airhelp v SAS, C-28/20 (2021), CJEU Grand Chamber — eur-lex.europa.eu.
• European Commission, Interpretative Guidelines on Regulation (EC) No 261/2004, C/2024/5687 (OJ C, 25.9.2024), §5.1-5.4 and §6.3 — eur-lex.europa.eu, checked 2026-10-12.
• D (Air traffic management decision), C-108/26 (judgment of 8 October 2026, provisional text), CJEU — eur-lex.europa.eu, checked 2026-10-12.
• TAP Portugal (Death of the co-pilot), C-156/22 (2023), CJEU — eur-lex.europa.eu.
• Pešková, C-315/15 (2017), CJEU — eur-lex.europa.eu.
• AirHelp Germany (Aircraft struck by lightning), C-399/24 (2025, provisional text), CJEU — eur-lex.europa.eu.
• Freebird Airlines Europe, C-302/22, order of 3 October 2022 (French text), CJEU — eur-lex.europa.eu.
• Germanwings (Pauels), C-501/17 (2019), CJEU — eur-lex.europa.eu.
• Moens v Ryanair, C-159/18 (2019), CJEU — eur-lex.europa.eu.
• SATA International (Failure of the refuelling system), C-308/21 (2022), CJEU — eur-lex.europa.eu.
• Touristic Aviation Services v Flightright, C-405/23 (2024), CJEU — eur-lex.europa.eu.
• Siewert, C-394/14, order of 14 November 2014, CJEU — eur-lex.europa.eu.
• Krüsemann, C-195/17 (2018), CJEU — eur-lex.europa.eu.
• TAP Portugal (LE v. TAP), C-74/19 (2020), CJEU — eur-lex.europa.eu.
• Austrian Airlines, C-826/19 (2021), CJEU — eur-lex.europa.eu.
• Eglītis & Ratnieks, C-294/10 (2011), CJEU — eur-lex.europa.eu.
• McDonagh, C-12/11 (2013), CJEU — eur-lex.europa.eu.
• European Commission, National Enforcement Bodies — Regulation (EC) No 261/2004, updated 27 August 2026 — transport.ec.europa.eu, checked 2026-09-15.
• Reddit r/travel, “Airline refusing €400 EU261 compensation for 3+ hour delay ... ” (11 February 2026, follow-up 8 May 2026) — reddit.com, passenger report, accessed 2026-09-18.
• Reddit r/travel, “Don’t accept the airline’s first rejection! Iberia dismissed my EU261 claim.” (22 June 2026) — reddit.com, passenger report, accessed 2026-09-18.
• Reddit r/Ryanair, “Ryanair cancelled my flight due to Belgian ATC strike ... ” (2 June 2026) — reddit.com, passenger report, accessed 2026-09-18.

#FAQ

Is a strike by the airline's own staff extraordinary?

No. In Airhelp v SAS (C-28/20, 2021), the CJEU Grand Chamber held that a lawful strike by the carrier’s own pilots stays internal to its normal activity, whatever the union’s demands. Compensation stays owed unless a genuinely separate cause applies.

Is crew sickness an extraordinary circumstance under EU261?

No. In TAP Portugal (C-156/22, 11 May 2023), the CJEU held that the unexpected absence of an essential crew member through illness or death, shortly before departure, is not extraordinary. The court looked at the absence itself, not its medical cause, so a pilot who passed regular medical checks changes nothing.