Weather is the extraordinary circumstances defence that airlines reach for most readily, and it is also the one that passengers challenge least often. There is a common assumption that if weather is mentioned, the airline automatically has a valid excuse. The reality is more nuanced. Some weather events genuinely qualify as extraordinary circumstances. Others do not. And even when the weather was genuinely severe, the airline must still demonstrate that it took all reasonable measures to minimise the impact.
When weather is genuinely extraordinary
Severe weather that makes flying genuinely unsafe is a legitimate extraordinary circumstance. Thunderstorms with extreme turbulence, heavy snowstorms that close runways, dense fog that drops visibility below minimums, volcanic ash clouds, and hurricanes all fall into this category. When air traffic control imposes restrictions or closes airspace because of dangerous weather conditions, airlines cannot reasonably be expected to fly.
The key phrase is "genuinely unsafe." Weather conditions that make flight operations difficult, slower, or less comfortable are not the same as conditions that make flying impossible or dangerous.
When weather is not a valid excuse
Light rain, moderate wind, scattered clouds, or winter temperatures are all part of normal aviation operations. Aircraft and airports are designed to operate in a wide range of weather conditions, and pilots are trained for them. An airline cannot cite "weather" as extraordinary when the conditions were within normal operating parameters and other flights were operating normally.
| Genuinely extraordinary | Not extraordinary |
|---|---|
Severe storms with ATC restrictions |
Light to moderate rain |
Heavy snowstorm closing the runway |
Normal winter weather requiring de-icing |
Dense fog below landing minimums |
Low cloud cover within operating limits |
Volcanic ash cloud in the flight path |
Strong but manageable crosswinds |
The "other flights were operating" test
One of the most effective ways to challenge a weather excuse is to check whether other flights at the same airport, around the same time, were operating normally. Services like Flightradar24 make this easy to verify. If your flight was cancelled due to "severe weather" but dozens of other aircraft departed and landed without issue, the weather explanation becomes much harder for the airline to sustain.
This information is freely available through airport websites, which publish live departure and arrival data, and through flight-tracking services. A screenshot showing a full page of on-time departures at the same airport and time as your "weather-cancelled" flight is compelling evidence.
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DEPARTURES
De-icing is not extraordinary
Airlines sometimes cite the need for de-icing as a weather-related extraordinary circumstance. Courts have generally rejected this. De-icing is a routine winter operational procedure that airlines must plan for. If an airline operates flights during winter months and does not have adequate de-icing capacity, resulting in delays, that is an operational planning failure, not an extraordinary event.
Weather at a different airport
Airlines occasionally blame weather at a different location: the aircraft was coming from an airport that had bad weather, causing it to arrive late for your flight. This "knock-on delay" argument is generally not accepted as extraordinary circumstances, because managing fleet rotations and building in buffers for disruptions is part of normal airline operations.
Challenge vague weather claims
If an airline blames weather, ask for specifics: which airport, what conditions, what restrictions were in place, and what alternative measures were considered. Check the facts against independent weather data and flight-tracking records. Many weather claims do not withstand scrutiny.