Denver International Airport (DEN) is currently dealing with a significant power outage that began around 9:20 AM MDT this morning, Wednesday, March 18, 2026.
The situation is dynamic, but here is the most recent update on how it is affecting travel and airport operations:
Current Operational Impacts
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The Train to Gates: The most critical impact is to the automated train system that connects the terminal to Concourses A, B, and C. It is currently out of service or running on extremely limited backup power, leading to massive bottlenecks at the security checkpoints.
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Concourse B: This area appears to be the most heavily affected, with multiple reports of partial darkness, non-functioning escalators, and toilets that are out of service due to the electric pumps being down.
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Security Checkpoints: The North Security Checkpoint was already closed for ongoing construction, and the power incident has caused “bridge” delays at the South and Bridge checkpoints as staff transition to manual procedures.
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Flight Delays: While the runways remain open, the “gate-side” power issues are causing a ripple effect. Thousands of passengers are currently stranded in the main terminal because they cannot reach their gates.
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Traveler Advice
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Do Not Take the Train: If you are at the airport, look for directional signage for the bridge walkway to Concourse A. However, there is no pedestrian walkway to Concourses B or C; you must wait for airport shuttle buses or the train to be restored.
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Check Flight Status: Airlines like United (which hubs in Concourse B) and Southwest (Concourse C) are seeing the highest volume of ground delays. Check your airline’s app before heading to the airport.
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Arrive Extra Early: If you have a flight later today, airport officials are recommending arriving at least 4 hours early, as the backlog from the morning outage will likely take all day to clear.
Why Is This Happening?
The specific cause of the “power incident” hasn’t been officially confirmed by Xcel Energy yet, but it coincides with a record-breaking March heat wave in Colorado. Temperatures are nearly 30°F above normal today, which has put unexpected strain on the regional power grid.
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