Using gates primarily in Concourses D and E, Frontier Airlines ATL Terminal flies out of Hartsfield-Jackson Atlanta International Airport (ATL)’s Domestic North Terminal. In this terminal, travelers can get access to necessary services like ticketing, baggage claim, security, check-in counters, and more. There are three ways for travelers to check in: at the airport counters, at self-service kiosks, or online via the airline’s website. To ensure that all procedures go smoothly, it’s important to arrive at least 90 minutes before domestic flights.