DEN currently has 148 narrow-body contact gates with 21 ground load positions. Passengers access the gates via the A, B and C concourses. To reach the A Gates, passengers can choose to walk over a pedestrian bridge or take the passenger train. Access to B and C Gates is limited to the passenger train.

As of 2026, Denver International Airport (DEN) has approximately 170 to 180 gates following the completion of its massive Gate Expansion Program. This multi-billion-dollar project added 39 new gates across all three concourses (A, B, and C) to accommodate the rapid growth of United Airlines and Southwest Airlines. Concourse A saw the addition of 12 new gates, including several for international flights; Concourse B added 10 gates; and Concourse C added 16 gates, which are primarily used by Southwest. Additionally, a new "Ground Load Facility" on the east end of Concourse A provides five extra gates for carriers like Frontier. These expansions increased the airport's overall gate capacity by 30%, making it one of the largest and most efficient hubs in the world. The gates also feature modern amenities like outdoor decks with fire pits and mountain views, reflecting Denver's status as a top-tier global gateway for both domestic and international travel.