One of United Airlines' main hubs Terminal 1 at Chicago O'Hare International Airport United Airlines ORD Terminal is where the airline primarily operates. United's checkin desks baggage claim and most of its gates are in Terminal 1 mainly in Concourses B and C. Convenient features including the United Club lounges a wide variety of food options and shopping are available at this terminal. United also uses Terminal 5 for international arrivals and certain international departures. Traveling through ORD is simple and easy for passengers connecting through Terminal 1 which is wellorganized with clear signage and United's mobile app for gate information updates.