United Airlines ORD Terminal .

As one of its main hubs, Terminal 1 at Chicago O'Hare International Airport (ORD) is the primary operating location for United Airlines ORD Terminal. Concourse B and Concourse C are located in Terminal 1, and they are connected by the well-known "Sky's the Limit" neon light installation underground tunnel. United operates the majority of its domestic flights out of Concourse B, and its international flights operate out of Concourse C. There are multiple United Club lounges at Terminal 1 that are open to passengers in both concourses. These lounges provide free Wi-Fi, snacks, and beverages in addition to cozy seating for frequent and premium flyers. The United Polaris Lounge in Concourse C offers a more opulent experience with full-service dining and premium amenities for visitors from abroad.