These were the airlines with the worst UK flight delays in 2025 (opens original article in a new tab)

Airlines with the worst UK flight delays in 2025 were ranked by the Civil Aviation Authority, with Air India leading at 36 minutes and 36 seconds average delay.

• Air India had the longest average delay at 36 minutes and 36 seconds for UK departures in 2025
• TAP Air Portugal ranked third with an average delay of 23 minutes
• The list includes 30 airlines with delays ranging from 8 minutes to 36 minutes and 36 seconds