United Airlines DEN Terminal is the primary carrier at Denver International Airport (DEN), with its main operations centered in Concourse B. As one of United’s largest hubs, DEN connects passengers to a vast network of domestic and international destinations. United’s presence at DEN is extensive, offering flights to cities across the U.S., Europe, Asia, and Latin America. Concourse B is designed to accommodate the high volume of United flights and passengers, offering a variety of amenities such as United Club lounges, diverse dining options, retail stores, and efficient security screening processes.