Frontier Airlines Departure Terminal Atlanta is the South Terminal at Hartsfield-Jackson Atlanta International Airport (ATL). Passengers flying with Frontier should proceed to this terminal for check-in, baggage drop, and security screening. The South Terminal provides various amenities such as restaurants, shops, and seating areas, ensuring a comfortable waiting experience before your flight. It’s advised to arrive at least two hours before departure to allow ample time for all procedures. Always check your boarding pass and the airport displays for any last-minute updates regarding gate assignments.