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At Chicago O’Hare International Airport (ORD), Frontier Airlines ORD Terminal operates out of Terminal 5 (T5), which is the primary terminal for international flights and several low-cost carriers, including Frontier. While Frontier does offer both domestic and international flights, it is housed in Terminal 5 for all operations at O'Hare. In this detailed breakdown, we'll explore everything you need to know about Frontier Airlines at ORD, including terminal services, check-in procedures, baggage policies, and transportation options.