Heydar Aliyev International Airport is one of the seven international airports serving Azerbaijan. Heydar Aliyev International Airport is the busiest airport both in Azerbaijan and in the South Caucasus as well as one of the busiest in the post-Soviet countries. Formerly, it was called Bina International Airport, after a suburb of the Azerbaijani capital Baku. The airport is 20 kilometers northeast of Baku, connected to the city by a highway. It serves as the hub for national carrier Azerbaijan Airlines as well as for Azal Avia Cargo and Silk Way West Airlines.