If you're wondering what terminal is frontier at atl , rest assure that Frontier Airlines operates out of the Domestic Terminal at Hartsfield-Jackson Atlanta International Airport, specifically within Concourse E. This bustling concourse is easily accessible via the Plane Train or the pedestrian walkway from the main terminal, ensuring smooth connections to baggage claim, rental car facilities, and the MARTA station. Concourse E is equipped with a variety of amenities, including comfortable seating areas, charging stations, and a diverse selection of dining and shopping options, making your pre-flight experience both convenient and enjoyable. When planning your trip, be sure to arrive at the Domestic Terminal with ample time to navigate to Concourse E, especially during peak travel hours, since Frontier's check-in counters, ticketing kiosks, and boarding gates are all located here.