İSTANBUL AIRPORT TRANSPORTATION OPTIONS - AN OVERVIEW

You should purchase your IstanbulKart from the Metro station within the airport. The devices are blue and yellow and Evidently state ‘IstanbulKart’ on them. Some devices assist you to spend by credit score/debit card, and Some others help you to pay back with Lira cash. You might have to queue, so just Wait and see.However, remember that taxi f