When looking over your boarding pass to double-check What Terminal is at Delta Airlines at ATL, it is important to note that the airline operates out of both major airport complexes depending on your final destination. All local domestic and Canadian routes process through the Domestic Terminal South for ticketing and baggage pickup. Meanwhile, if you are heading out on an intercontinental long-haul flight, your itinerary will route you straight to the Maynard H. Jackson Jr. International Terminal on the eastern side of the airfield.