EasyJet will pre-emptively cancel "around 24" Gatwick flights a day until 6 June, claiming it was necessary "to provide reliable services" over what is expected to be a busy extended bank holiday period owing to the Queen’s platinum jubilee.
It comes after the airline was forced to cancel hundreds of flights last week due to an IT issue.
Tui, meanwhile, said a "combination of factors was causing significant operational disruptions", forcing it to cancel some flights and packages.
The effects were felt at many Tui departure points across the UK and Ireland, including Birmingham, Bristol, Cardiff, Cork, Dublin, Gatwick, Glasgow, Manchester and Stansted.
