Turkish Airlines (THY) is the national flag carrier airline of Turkey, headquartered at the Turkish Airlines General Management Building on the grounds of Atatürk Airport in Istanbul. It operates scheduled services to 48 domestic and 235 international airports in Europe, Asia, Africa and the Americas. With 283 destinations, the airline is the fourth-largest carrier in the world by number of destinations. THY has been a member of the Star Alliance network since 1 April 2008.