Extraordinary circumstances are events which cause flight disruption over which the airline has no control. This could be something like a medical emergency or a national strike, bad weather conditions or air traffic control restrictions.

What would cause a flight to be Cancelled?

Airlines experience computer outages, though a flight might also be cancelled because of a glitch that originated in air traffic control. This could be due to a system failure, power outage, cyber attack, or range of other IT issues.

Why are flights being cancelled 2021?

A 2021 rebound in travel, when airlines didn’t have enough staff to keep up with demand, led to heavy cancellations and delays earlier this year. Southwest Airlines struggled in summer and fall because of delays and cancellations, which it blamed on computer problems, staffing shortages and bad weather.