During May half term we went to Antalya region of Turkey. It was £1800 for 2 adults and 2 children all inclusive plus it included our insurance and pre-paid seat allocation.
August 2018 the cost of an 11 night AI holiday for us all again in Dalaman region of Turkey (Turunc - quiet, village/small town resort 20 minutes west of Marmaris and NOT built up or bustling with drunken idiots ..) is £3,500 give or take a couple of hundred pounds either side.
TBH we found the bigger travel companies (Thomas Cook, Thomson and First Choice) notoriously expensive. Even for Turkey they were wanting a good £1,000 more and Spain was looking like £5,000 for a 4* AI resort with slides (like what we have for Turkey).
We fly with jet2holidays now. They are northern mainly (based mainly in Leeds but fly from loads of other Northern airports) but are branching out to southern airports - Stansted being one I can remember. We flew with them when we had our timeshare in Madeira and when that ended, we chose them for our European holidays.
We are going to Gran Canaria (3 adults + 2 kids) the Tuesday after Easter next year. AI for a week. £2,800 - everything.
PLUS you get 22kg of luggage and 10kg of hand luggage as standard - no extras.
Also NOT working for jet2holidays! We just have fab holidays with them! No different to Thomas Cook etc and we went with them 2014. We don't see why we should pay more money, plus extra to ensure we get 20kg of luggage when the standard is exactly the same.