The airline will operate services from Liverpool to Corfu, Heraklion, Kos, Rhodes and Zante this summer, meaning it will fly to a total number of 14 Greek airports.
It will also soon offer flights from Birmingham to Mytilene and from Newcastle to Chania.
Jet2 has also increased the number of arriving seats by 12% to 1.52 million for the whole year, adding capacity to Corfu, Lesvos, Santorini, Rhodes and Crete in March and April.