Frontier Airlines at Hartsfield-Jackson Atlanta International Airport (ATL) is located in Terminal N, also known as the North Terminal., also known as the North Terminal. Travelers can check in at designated Frontier Airlines terminals and go through security to Concourse T, where most Frontier flights depart. The North Terminal offers a variety of amenities such as restaurants, shops and businesses. For additional information on gate directions and flight information, travelers should contact Frontier Airlines directly or check the airport’s information display. https://airportsterminalguides.....com/frontier-airlin