Frontier Airlines ATL Terminal. At this terminal, Customers of Frontier Airlines can check in at airline counters or via self-service kiosks. To ensure a smooth experience and to give time for security checks and check-in, it is recommended to arrive early. There are a number of amenities available at Terminal S to enhance your travel experience, such as shops, restaurants, and lounges. Check any of the numerous computer screens positioned throughout the airport to obtain the most up-to-date information regarding gates and aircraft. Have fun on your Frontier Airlines flight!
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