Terminal 5 at Chicago O'Hare International Airport (ORD) is where Frontier Airlines ORD Terminal is based. This terminal offers a number of facilities, including dining options, retail stores, and a pet relief area, and it serves both domestic and international flights. Due to Terminal 5's status as an international gateway, passengers on Frontier flights should arrive early. In the terminal, self-service kiosks and designated counters are where passengers can check in for Frontier flights. Travelers can use the Airport Transit System (ATS), which conveniently links all of O'Hare's terminals, to move between them.

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