Hey! If you’re flying with Southwest Airlines ATL Terminal you’ll be working out of Concourse C at Hartsfield-Jackson Atlanta International Airport. It’s pretty seamless, with efficient access to gates, great helpful staff, and decent choices of dining places. Security lines get busy, but they move pretty fast. Clean, well-organized terminal; navigating is stress-free. Overall, provides hassle-free travel and is, therefore, an excellent option for Southwest passengers traveling into and out of Atlanta. Safe travels.