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Concourse B at Denver International Airport (DEN), United Airlines DEN Terminal which serves as a major hub for both domestic and international flights, is the principal operating location of United Airlines. Concourse amenities include self-service kiosks, pleasant check-in booths, and the United Club lounge for first-class travelers. Using the automated train system at the airport, passengers may move between Concourse B and the Jeppesen Terminal with ease. The concourse offers shopping and dining alternatives to improve the overall passenger experience. For a seamless travel experience at DEN, it is recommended to arrive at least two hours ahead to domestic flights and three hours prior to international flights.