Jet2.com and Jet2holidays has suspended flights to Turkey, Portugal and Iceland.
All flights to Antalya and Dalaman through 30 April (inclusive) are suspended.
Jet2 said while its Bodrum and Izmir programmes were unaffected, its priority was flying customers home from Antalya – the only Turkish destination where it currently has people in-destination.
It is contacting people due to travel before 30 April to advise them of their options.