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The main terminal for international flights and a number of low-cost airlines, including Frontier, is Terminal 5 (T5) at Chicago O'Hare International Airport (ORD), where the Frontier Airlines ORD Terminal is located. Although Frontier operates both dome

The main terminal for international flights and a number of low-cost airlines, including Frontier, is Terminal 5 (T5) at Chicago O'Hare International Airport (ORD), where the  Frontier Airlines ORD Terminal  is located. Although Frontier operates both domestic and international flights, all of its operations are located in Terminal 5 at O'Hare. We'll go over all you need to know about Frontier Airlines at ORD in this comprehensive guide, including baggage regulations, check-in processes, terminal services, and available modes of transportation.