Extraordinary Circumstances: When Airlines Don't Have to Pay

The Most Contested Part of EC 261

EC 261/2004 gives passengers a strong right to compensation when flights are delayed, cancelled, or overbooked. But the regulation includes an important exception: airlines can refuse to pay if the disruption was caused by extraordinary circumstances that could not have been avoided even if all reasonable measures had been taken. This exception is the single most abused provision in the regulation, and understanding it is essential for any passenger considering a claim.

The regulation itself does not define exactly what constitutes extraordinary circumstances. It offers a few examples in its recitals, such as political instability, meteorological conditions, and security risks. But the real boundaries have been drawn by court rulings over the past two decades, and those boundaries are far narrower than airlines would like passengers to believe.

What Courts Have Ruled Qualifies

European courts, including the Court of Justice of the EU, have established that extraordinary circumstances must meet two tests. First, the event must be outside the airline's normal activity and beyond its effective control. Second, the airline must show that it could not have avoided the consequences even with all reasonable measures.

Situations that courts have generally accepted as extraordinary circumstances include severe weather events that genuinely prevent safe flight operations, political instability or armed conflict affecting airspace, air traffic control strikes that ground flights, volcanic ash and natural disasters like the 2010 Eyjafjallajokull eruption, bird strikes in most jurisdictions, and hidden manufacturing defects that could not have been detected through normal maintenance.

Each of these shares a common thread: the event originates entirely outside the airline's operational control, and no amount of planning or preparation could have prevented its impact on the flight.

What Airlines Claim but Courts Reject

This is where the gap between airline behaviour and the law becomes stark. Airlines routinely cite extraordinary circumstances for situations that courts have repeatedly ruled do not qualify. The most common false excuse is technical or mechanical issues.

In the landmark Wallentin-Hermann v Alitalia case (C-549/07), the Court of Justice ruled that technical problems identified during aircraft maintenance, or caused by failure to maintain an aircraft, are not extraordinary circumstances. The reasoning is clear: maintaining aircraft is inherent to an airline's normal activity. Technical faults are foreseeable, preventable through proper maintenance, and part of the operational risk that airlines accept when they sell tickets.

Despite this ruling being over fifteen years old, airlines continue to reject claims by citing technical issues. They use vague language like "unforeseen technical difficulties" or "safety-related maintenance" to make routine mechanical problems sound like extraordinary events. Courts see through this consistently, but airlines know that many passengers will accept the rejection and never challenge it.

Staff shortages and crew sickness also fail the extraordinary circumstances test. Managing crew rosters, maintaining standby crews, and planning for expected levels of staff illness are all part of running an airline. When a flight is disrupted because the airline didn't have enough crew available, that's an operational failure, not an extraordinary circumstance.

Other commonly rejected excuses include operational decisions such as tight turnaround scheduling, knock-on delays from poor planning where airlines operate schedules with minimal buffers and then blame the resulting cascading delays on external factors, IT system failures, and baggage handling issues.

The "All Reasonable Measures" Test

Even when circumstances genuinely are extraordinary, airlines are not automatically exempt from compensation. They must also demonstrate that they took all reasonable measures to avoid the disruption or minimise its impact. This is the second limb of the test, and airlines often fail it.

For example, if a snowstorm grounds flights at an airport, that may well be an extraordinary circumstance. But if the airline failed to rebook passengers on available alternative flights, or didn't provide timely information about the disruption, or could have routed passengers via a different airport, the airline may still owe compensation because it didn't take all reasonable measures to get passengers to their destination.

Can airlines refuse compensation for bad weather?

Only for genuinely severe weather that prevents safe operations. Routine rain, moderate wind, or typical seasonal conditions that airlines should plan for do not qualify. If other airlines operated normally on the same route at the same time, it's a strong indication that the weather was not truly extraordinary.

What about technical faults discovered just before departure?

Technical faults are almost never extraordinary circumstances, regardless of when they're discovered. The Wallentin-Hermann ruling established that technical problems are inherent to airline operations. The only narrow exception is for hidden manufacturing defects that could not have been detected through normal maintenance programmes.

How can I challenge an airline's extraordinary circumstances claim?

Start by asking the airline for specific details about the claimed extraordinary circumstance. Vague responses like "operational reasons" or "circumstances beyond our control" are not sufficient. You can verify weather claims using historical data from national meteorological services, check whether other flights from the same airport operated normally, and review flight tracking data from services like FlightRadar24.

Will proposed EU reforms change the extraordinary circumstances rules?

The proposed revision of EC 261 would create an exhaustive list of extraordinary circumstances, updated periodically by the European Commission. This would replace the current open-ended definition and make it significantly harder for airlines to invent novel excuses. However, the reform has been under discussion for years and a final timeline remains uncertain.

How to Respond When Airlines Use This Defence

If an airline rejects your claim citing extraordinary circumstances, don't simply accept it. Request specific, detailed information about the event they're claiming was extraordinary. A legitimate extraordinary circumstance comes with verifiable details: specific weather conditions at a specific time, a named air traffic control restriction, or a documented external event.

Vague language is a red flag. Phrases like "due to circumstances beyond our control" or "unforeseen operational issues" tell you nothing and are typically used when the airline knows its defence is weak. Push back with a clear, factual response that references the relevant case law and asks for evidence.

Remember that the burden of proof lies with the airline, not with you. They must demonstrate that the circumstances were genuinely extraordinary and that they took all reasonable measures. If they can't provide clear evidence, the defence fails and your right to compensation stands.