Hartsfield-Jackson Atlanta International Airport (ATL) is one of the busiest airports in the world, connecting millions of passengers to destinations across the globe. What Airlines fly out of Concourse B in Atlanta? The airport’s multiple concourses are home to various airlines, offering a wide range of domestic and international flights. Concourse B, located within ATL’s massive terminal complex, is particularly known for its diverse airline offerings. Here’s a detailed look at the airlines that fly out of Concourse B in Atlanta, ensuring smooth travel experiences for both business and leisure travelers.