Would suggest you look on Kosmars own web site as they fly from both those airports and they do a Late Availability search.

Do not think you get a good deal anymore booking late, we booked about 4 weeks ago to Kefalonia with travelsupermarket and found it out of this world the price we are paying for 2 week plus a meal which i'm not really bother about is so much cheaper than what we have paid in the past as much as £129 cheaper than some flights previouse weather we have just struck lucky I don't know we booked about 8 weeks ago our friends booked 14 weeks ago and paid £160 without a meal.