Not sure about other airport's in turkey but do know you can fly into Antalya airport all year round if that help's.

It will be possible, because there are quite a few airlines that fly at that time of year, but not many will have their schedules out yet for 2008. If you book now its a bit risky, because they don't really know what the demand will be for then, so its pretty much guesswork. Flights are very likely to be changed or cancelled.