Istanbul Atatürk Airport is the main international airport serving Istanbul, and the biggest airport in Turkey by total number of passengers, destinations served and aircraft movements. Opened in 1924 in Yeşilköy, on the European side of the city, it is located 24 km (15 mi) west of the city centre and serves as the main hub for Turkish Airlines. The city's other, smaller, international airport is Sabiha Gökçen International Airport. As of February 2017, 273 destinations are served from Istanbul-Atatürk, making it the airport with the second-most destinations worldwide after Frankfurt Airport.
The airport was originally named Yeşilköy Airport. In the 1980s, it was renamed Istanbul Atatürk International Airport in honour of Mustafa Kemal Atatürk, the founder and first president of the Republic of Turkey. It served more than 60 million passengers in 2015, making it the 11th-busiest airport in the world in terms of total passenger traffic and the 10th-busiest in the world in terms of international passenger traffic. As of 2017, it is Europe's 5th-busiest airport after London Heathrow, Paris Charles de Gaulle, Frankfurt Airport and Amsterdam Schiphol Airport, having fallen from third place after a decline in passengers due to security fears.