Frontier Airlines operates from Concourse T at Hartsfield-Jackson Atlanta International Airport (ATL). Upon arrival at ATL, head to Concourse T where you will find Frontier Airlines Terminal In Atlanta check-in counters and bag drop areas. To expedite your travel, it’s advisable to check in online before arriving. After checking in and dropping off your checked luggage, proceed through the security checkpoint. Concourse T offers various amenities, including dining options, retail shops, free Wi-Fi, and charging stations to make your wait more comfortable. Be sure to monitor the flight information displays for any updates on gate assignments and departure times.