TUI will offer more flights to a total of 15 destinations from Birmingham and Manchester airports this summer.
It has put on sale six more flights from Birmingham and eight more flights from Manchester.
The increases mean it will offer 15 flights a week from Birmingham just to Turkey, and 21 weekly flights from Manchester to Turkey.
The travel giant is basing an additional aircraft at each airport to operate the additional flights, which include the Greek islands of Kefalonia, Rhodes and Crete, plus Palma and Cyprus.
TUI will also offer more 10 and 11-night holidays from both airports to Greece, Palma, Cyprus and Turkey.