United Airlines DEN Terminal operates primarily out of Concourse B at Denver International Airport (DEN), which serves as one of the airline’s largest hubs. Concourse B is a modern, well-equipped terminal designed to handle both domestic and international flights for United. Passengers flying with United can access a variety of amenities, including self-service check-in kiosks, expedited security options like TSA PreCheck, and a wide selection of dining and shopping options. United passengers can also benefit from exclusive lounges, such as the United Club, offering a premium experience with complimentary beverages, snacks, and comfortable seating.