I couldnt get with Aegean this year, so went with Thomas Cook at a total of £1040, thats for June and October flights.
As you can imagine, I am delighted to have just booked next years flights with Aegean via John at ICR for a total price of £680. Thats 2 weeks in June and 2 weeks in October. Savings of £360, thats four days spending money, so even if they do change their times by a few hours, its not going to hurt us.
We have already had flight time changes for this year with Thomas Cook - so I guess it can happen to any airline.