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Denver International Airport Plans $700M Concourse Walkway Conversion Project

Denver International Airport plans a $300 million to $700 million project to convert unused baggage tunnels into pedestrian walkways connecting concourses A and B.

By Colin Percy · May 26, 2026

Denver International Airport is set to repurpose its original, long-vacant underground baggage tunnels to provide a pedestrian alternative to its internal train system. The project aims to mitigate terminal congestion and passenger delays that occur when the train system experiences outages. The proposed walkways will link the A and B concourses to the main terminal area.

Construction for the project is slated to commence in 2027, with an estimated completion timeline between 2028 and 2029. While final designs are pending, costs are projected to range from $300 million to $700 million. The new infrastructure will be integrated without disrupting current airport baggage operations, complementing the airport's ongoing $75 million investment in train system upgrades.

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Denver International Airport

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