Chicago O'Hare International Airport's (ORD) Terminal 1 is the main hub for United Airlines operations. Concourses B and C of the United Airlines ORD Terminal are isolated from one another by a tunnel that is home to a well-known neon light display. Concourse C is the departure area, reachable by subterranean corridors, and Concourse B is home to the ticketing and check-in counters. In order to provide p****engers with a comfortable pre-boarding experience, Terminal 1 has a variety of food, retail, and lounge options, such as the United Club and Polaris Lounge.