Flights from Birmingham Airport had the longest delays in 2021, analysis of Civil Aviation Authority data suggests.
Planes left 12 minutes and 24 seconds late from Birmingham on average in 2021, which was followed by Southampton, Heathrow, Exeter and Aberdeen.
The ranking takes into account all scheduled and chartered departures, but cancelled flights are not included.
Birmingham said many delayed departures were able to make up time in the air.
This was because of a huge reduction in flight numbers due to the coronavirus pandemic.