Check your ticket for the airport code before you book anything else. Istanbul Airport (IST) sits on the European side and handles most long-haul flights. Sabiha Gokcen (SAW) is across on the Asian side and skews toward low-cost and regional carriers. The two are on opposite ends of a very large city, so a SAW arrival with a Sultanahmet hotel means a long ride — plan for it.
From IST, the cheapest routes are the Havaist airport buses, which run to Taksim and other hubs, and the M11 metro, which links the airport to the city rail network. Both take an Istanbulkart, so buy that card at the airport first. A taxi to the historic center will run noticeably more and, in traffic, is not always faster.
From SAW, the Havabus coaches head to Kadikoy and Taksim. Whichever airport you land at, use the official taxi rank or a pre-booked transfer rather than anyone who approaches you in the arrivals hall. For a late-night arrival, a fixed-price transfer arranged in advance is often worth the small premium just to skip the negotiation.




