What Terminal is Southwest Airlines at ATL? Southwest Airlines operates out of Concourse C at Hartsfield-Jackson Atlanta International Airport (ATL). This concourse is part of the Domestic Terminal and is well-equipped with modern amenities, including dining options, retail shops, and comfortable seating areas. Passengers flying with Southwest Airlines can enjoy convenient access to check-in counters and efficient security checkpoints. The concourse is connected to the rest of the airport via the Plane Train, ensuring easy transfers. Travelers are encouraged to arrive at least two hours before their flight for a seamless experience.
