Frontier Airlines ORD Terminal At Chicago O'Hare (ORD), Frontier Airlines ORD Terminal is based out of Terminal 5, offering travelers easy check-in and boarding options in a contemporary environment. The travel experience is improved by Terminal 5's free Wi-Fi, dining options, and retail stores. Because this terminal serves both domestic and international flights, travelers should allow additional time for security and check-in. For travelers on Frontier, Terminal 5 is a convenient entry point because it is easily accessible by airport transportation and has clearly marked signage.
