Which Airlines Fly Out of Concourse B at Atlanta Airport? Hartsfield-Jackson Atlanta International Airport (ATL) is one of the busiest airports in the world, and Concourse B plays a key role in its operations. If you’re flying from Concourse B, here’s what you need to know about the airlines that operate from this part of the airport.

Primary Airline: Delta Air Lines Delta Air Lines is the primary carrier operating out of Concourse B. As ATL’s largest and dominant airline, Delta serves numerous domestic flights from this terminal. If you’re flying Delta, chances are high that you’ll be departing from Concourse B, although always confirm your gate ahead of time.