What Airlines fly out of Concourse B in Atlanta? Concourse B at Hartsfield-Jackson Atlanta International Airport (ATL) primarily serves Delta Airlines. It features 32 gates and offers various amenities such as restaurants (like TGI Fridays and Paschal’s), shops, and services to enhance passenger comfort. The concourse is part of ATL's extensive terminal system, which supports more than 107 million passengers annually. Travelers can access services like luggage storage, customer service desks, and the Plane Train for quick transportation.