The Greek carrier will serve the islands of Corfu, Crete, Mykonos and Santorini from London.
It will also fly to Thessaloniki from the capital.
From Heathrow, Aegean will offer up to daily Crete (Heraklion) flights, up to three weekly Santorini flights and up to three weekly Thessaloniki flights.
Services will operate variously from mid-May through to early October.
It will also put on up to three weekly Mykonos flights, operating from 19 June through to 18 September.
From Gatwick, Aegean will offer up to four weekly Corfu flights, also operating from May through to October.
One-way promotional fares lead in from £44pp.
Aegean will also continue to offer up to three daily direct Heathrow-Athens flights, as well as up to three weekly Manchester-Athens flights, and up to two weekly Edinburgh and Dublin to Athens services.
