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Denver International Airport (DEN) is planning an upgrade that could change how passengers move between terminals. It plans to convert portions of its long-abandoned underground tunnels into pedestrian walkways.
The project is part of the airport’s Vision 100 expansion plan, which aims to prepare it to serve more than 100 million passengers annually. The new tunnels would provide travelers with an alternative to the airport’s Automated Guideway Transit System, which has experienced several high-profile breakdowns in recent years.

Under the proposal, passengers would be able to walk (or use moving walkways) between the Jeppesen Terminal and Concourse A. Airport officials also see the tunnels as a backup option if the train system experiences future disruptions.
The underground passageways were originally built for Denver’s infamous automated baggage handling system, whose technical failures delayed the airport’s opening in the 1990s. Much of that tunnel network has remained largely unused ever since.
The pedestrian conversion would require significant renovations, including new flooring, walls, ventilation systems, lighting, and potentially moving walkways. Officials estimate the project could cost between $300 million and $700 million. The plan has received support from major airlines operating at Denver including United Airlines, American Airlines, and Southwest Airlines (all three see the walkways as a way to improve reliability during train outages).
Anthony’s Take: Denver’s trains are awful and I have experienced them breaking down several times. These walkways cannot come soon enough.
(Image Credits: Denver International Airport.)
(H/T: The Points Guy.)
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Advertiser & Editorial Disclosure: The Bulkhead Seat earns an affiliate commission for anyone approved through the links above This compensation may impact how and where links appear on this site. We work to provide the best publicly available offers to our readers. We frequently update them, but this site does not include all available offers. Opinions, reviews, analyses & recommendations are the author’s alone, and have not been reviewed, endorsed, or approved by any of these entities.