United Airlines DEN Terminal operations at Denver International Airport (DEN) are based on Concourse B, the airline’s principal hub. This terminal has a variety of amenities, including various lounges for United Club members, food options, and retail stores for passengers. Passengers may easily navigate the terminal’s check-in, security, and baggage claim areas. United Airlines operates numerous domestic and international flights from DEN, making it a hub for travelers in the Western United States. United Airlines’ efficient services and well-connected routes offer a smooth travel experience at Denver’s congested airport terminal.