There are two airports in Istanbul
Istanbul Airport: It is located on the European side at Arnavutkoy district, near the Black Sea and it is the largest airport in Turkey. It was inaugurated on October 29, 2018 and has a capacity of very large numbers of flights to hundreds of destinations.
Sabiha Gokcen Airport: It is the second largest airport in the country’s largest city, Istanbul. It was built to relieve air traffic congestion at Ataturk Airport and used primarily by European low cost airlines.