Azerbaijan Airlines (Azərbaycan Hava Yolları), also known as AZAL, is the flag carrier of Azerbaijan, as well as the largest airline. Based in Heydar Aliyev International Airport (Baku). Azerbaijan Airlines is a member of the International Air Transport Association (IATA). Azerbaijan Airlines is certified with the 4-Star Airline Rating for the Quality of its Onboard product and service by Skytrax.