It really is as easy as John and Marggie say. Much easier than going to Antalya I would say. Though if you want Gatwick rather than Stansted, that is obviously another consideration. If you decide to fly to Stansted with Pegasus, maybe ask on here for anyone else flying on the same day? So you could join up with them? I have flown with Pegasus into Stansted a number of times and found the 2 flights to be very good. No problems at Sabiha Gokcen, as just a short walk, and there are staff to point you in the right direction.