Turkish Airlines is the national flag carrier airline of Turkey, headquartered at the Turkish Airlines General Management Building on the grounds of Atat¨¹rk Airport in Ye?ilk?y, Bak?rk?y, Istanbul.As of February 2015, it operates scheduled services to 261 destinations in Europe, Asia, Africa, and the Americas, making it the fourth-largest carrier in the world by number of destinations.With Istanbul Atat¨¹rk Airport being the main base, the Turkish carrier has secondary hubs at Esenbo?a International Airport, Sabiha G?k?en International Airport, and Adnan Menderes Airport. THY has been a member of the Star Alliance network since 1 April 2008.