Denver International Airport (DEN) serves over 75 million passengers annually across a sprawling 53-square-mile property. Because its single main terminal is separated from three massive midfield concourses, first-time visitors frequently miss their connections or waste precious time walking miles of subterranean corridors. Knowing the exact layout before you arrive prevents these costly delays.
The airport relies on a central Jeppesen Terminal linked directly to Concourse A, Concourse B, and Concourse C via an underground automated train system and a pedestrian skybridge. Understanding how these buildings connect, where security checkpoints sit, and how to read gate assignments will save you from frantic dashes before boarding.
Jeppesen Terminal Layout
The iconic tented Jeppesen Terminal anchors the entire facility. It splits vertically into East and West sides, and knowing which side your airline uses is vital for drop-off.
- Level 5: Baggage claim and international arrivals.
- Level 6: Passenger drop-off, ticketing counters, and curbside check-in.
- Level Bridge: Connects the terminal directly to the Westin Hotel and the transit center.
Security checkpoints operate on Level 5 and Level 6. The North and South security checkpoints handle the bulk of regular passengers, while the A-Bridge security checkpoint provides direct access to Concourse A without requiring the train. As extensively documented in latest reports by The Points Guy, the results are notable.
The Three Concourses Explained
Once you leave the main terminal, you enter the midfield concourses. None of these connect via a surface walkway to each other, meaning you must use transit systems to move between them.
Concourse A
Concourse A handles a mix of domestic and international flights. It sits closest to the main terminal. You can reach Concourse A either by taking the underground train or by walking across the pedestrian skybridge from the Jeppesen Terminal, which offers sweeping views of the airfield and the Rocky Mountains.
Concourse B
Concourse B is the largest concourse at DEN, serving as the primary hub for United Airlines. It features the longest stretch of gates, divided into two halves connected by moving walkways. If you land at a high-numbered gate in Concourse B, budget at least 15 minutes to reach the central train station.
Concourse C
Concourse C sits furthest from the main terminal and primarily serves Southwest Airlines and other domestic carriers. Like Concourse B, it utilizes a central underground station that feeds into long linear gate corridors. Expansion projects frequently add new gates to the eastern end of this concourse, so check digital boards immediately upon arrival.
Getting Between Concourses: Train vs Walk
The underground Plane Train runs every two minutes between the Jeppesen Terminal and all three concourses.
- Terminal to Concourse A: 1 minute.
- Concourse A to B: 1 minute.
- Concourse B to C: 1 minute.
You can also walk between Concourse A and the Jeppesen Terminal via the pedestrian skybridge, which takes about 10 to 15 minutes. However, you cannot walk between Concourses A, B, and C; you must take the train or board airport shuttle buses if train service is disrupted.
Common Mistakes to Avoid
Travelers frequently make specific operational errors that ruin their airport transit experience at DEN.
- Going to the wrong terminal side: Dropping off at East for an airline that operates out of West forces a long walk across the entire length of the baggage claim level. Check your airline's specific terminal side before your driver pulls up.
- Underestimating gate distances: Walking from the main security checkpoints to the far end of Concourse C takes upwards of 25 minutes if you don't take the train and moving walkways.
- Ignoring security line wait times: The North and South checkpoints often experience massive queues during morning peak hours (5:00 AM to 8:00 AM). Always check live updates via the Official Denver International Airport Website before heading to the airport.
- Confusing regional gate prefixes: Gates marked with letter suffixes or located in commuter hubs may require bus boarding rather than a jet bridge. Read your boarding pass carefully for regional flight instructions.
Frequently Asked Questions
How do I check my gate before arriving at DEN?
Open your airline's mobile app or check real-time departure boards on the Transportation Security Administration or airport site. Gate assignments change frequently due to aircraft swaps.
Is there a train between the concourses?
Yes. The underground Plane Train connects the main terminal and all three concourses for free 24 hours a day.
How early should I arrive for a domestic flight?
Arrive at least two hours before domestic departures. DEN security queues and long walking distances mean tight arrival windows frequently lead to missed flights.
Can I walk between Concourse B and Concourse C?
No. There are no pedestrian walkways connecting the independent concourses. You must use the underground train.
