British Airways DEN Terminal Our thorough guide guarantees a flawless travel experience, from food options and amenities to check-in processes and lounge access. Find out everything there is to know about baggage claims, security checks, and terminal amenities, whether you're arriving or leaving. With British Airways, stay informed and make the most of your time at Denver International Airport. Check out our advice for an easy trip through DEN Terminal that guarantees ease and comfort at every turn.