What Terminal is Southwest at ATL? If you're flying Southwest Airlines from Hartsfield-Jackson Atlanta International Airport (ATL), you'll find them operating out of Concourse C. Known for its efficiency and traveler-friendly layout, Concourse C offers a seamless experience for Southwest passengers. ATL, one of the busiest airports globally, is well-organized, making it easy to navigate to your terminal or gate. Southwest's focus on customer service pairs perfectly with ATL's amenities, ensuring a comfortable journey. Whether you're departing or arriving, you'll appreciate how the convenience of Concourse C enhances your travel plans. Happy flying with Southwest at ATL.