Denver International Airport officials announced on May 26, 2026 [1], that the airport will build pedestrian walkways to connect Concourses A, B, and C [1].

The project aims to resolve long-standing passenger frustrations by providing a reliable alternative to the airport's existing underground train system. By diversifying transit options, the airport hopes to mitigate the risk of missed flights caused by train delays or overcrowding.

Construction will utilize a dormant underground tunnel to create the new paths [2]. This infrastructure will allow travelers and airport employees to move between the three concourses [1] without relying solely on the rail system.

“For the first time ever, DIA will have walkways connecting all three concourses,” a DIA spokesperson said [1].

Airport officials said the project will help improve passenger flow and reduce tight connection stress [3]. The initiative is designed to create a more seamless transition for passengers moving between gates, particularly during peak travel periods.

Local leadership has praised the move as a necessary upgrade to the facility's layout. “This is a big win for Denver's travelers and for our entire community,” the Denver Mayor said [4].

The addition of the walkways is expected to alleviate pressure on the concourse trains, which have historically been the only method for passengers to traverse the distance between the different terminals. By integrating pedestrian access into the tunnel system, the airport intends to create a more redundant and flexible transit network for the thousands of people who pass through the facility daily.

““For the first time ever, DIA will have walkways connecting all three concourses.””

This infrastructure shift addresses a critical single point of failure in the airport's design. By converting unused space into a pedestrian network, the airport reduces its total dependency on the automated people mover, potentially lowering the impact of mechanical failures on flight connectivity and passenger experience.