@dev
There is only one way to come EsEs from istanbul, bus! I dunno which airport u gonna land but if its in europen that means u will come to taksim area, heart if city. There r lots of bus companies there to buy ticket and they have shuttle service till main bus stations. "Kamil Koc" is a good company to travel with bus also nilufer metro or ismail ayaz have bus to EsEs and it takes 4.5 hours generally but nowadays specially in rush hours hard to pass from europe side to asian side, due to this problem ur journey might be 6 hours.