Concourses B and C of Terminal 1 at Chicago O'Hare International Airport (ORD) are the main operating locations for United Airlines. A well-known aspect of the terminal is the subterranean tunnel that  United Airlines ORD Terminal  connects the two concourses, which is illuminated by bright neon lights. Concourse C handles more domestic and international departures, whereas Concourse B handles the majority of domestic flights. A number of facilities are available in Terminal 1, such as United Club lounges for first-class travelers, dining options, and retail stores. It guarantees a seamless travel experience for passengers by offering quick access to TSA security checkpoints and effective transportation services.