Jet2 has put on an extra 30,000 seats to Crete, Kos and Santorini for this summer from four UK airports.
The extra flights are to Chania and Heraklion in Crete, and to Kos and Santorini.
They will operate from July to September from Birmingham, Leeds Bradford, Manchester and London Stansted.
Jet2 said the expansion makes it the largest UK operator to Greece this summer.
It will offer a total of 3.5 million seats on 131 routes, including 25 new ones, with more than 360 weekly flights.
