Nonstop service between Memphis International and Hartsfield-Jackson Airport in Atlanta is ready to take off. Service between the two cities on Southwest Airlines has begun. Flights will operate twice-daily, except on Saturdays which will have one flight. Monday through Friday flights depart at 11am and 7:30pm. The lone Saturday flight leaves around 6:30 p.m. and Sundays flights are scheduled to take off at 9:30 a.m. and 7:00 p.m.