In recent years my problem has been that I've not been able to book ahead - plus it's been IST rather than DLM I was heading to, so THY from EDI was always first choice.
Just done a couple of random(ish) searches.
THY from Edinburgh to Dalaman (flag carrier with all the treats like hold bag, food, alcohol etc included) are sitting at £272rtn in September and £250rtn in October.
EasyJet (including 23kg each way) are £408rtn for exact same week in September, and £447rtn for the same week in October.
If time isn't an issue I know what I would choose
JF