Denver · airport guide
DEN Airport guide
Denver International Airport has Jeppesen Terminal and Concourses A, B and C. The quickest way from DEN to Union Station, downtown Denver is the RTD A Line commuter train (about 37 minutes, about $10.50).
Verified Oct 17, 2026By Steven MoHow we check Report a correction
RTD A Line commuter train, about $10.50
about $60–$75
Domestic to domestic, same terminal
Layover you need to visit the city
Quick answer
The quickest way from DEN to Union Station, downtown Denver is the RTD A Line commuter train (about 37 minutes, about $10.50). Connecting here, allow at least 55 min for a domestic connection in the same terminal. Airlines here include United, Southwest, Frontier, American and Delta.
- Terminals
- Jeppesen Terminal and Concourses A, B and C
- Taxi
- 30–45 min, about $60–$75
- Connecting
- At least 55 min for a domestic connection in the same terminal
- Lounges
- United Clubs (Concourse B); Amex Centurion Lounge (Concourse C) and more
- Hotel
- The Westin Denver International Airport, connected to the terminal
Getting from DEN to Union Station, downtown Denver
Fares are one way and approximate; check the operator before you travel.
- RTD A Line commuter trainto Union Stationabout 37 minabout $10.50
- Taxi or rideshare30–45 minabout $60–$75
Inside DEN
Terminals and connections
An underground train connects the main terminal with Concourses A, B and C inside security, every couple of minutes. Concourse A can also be reached on foot by a bridge.
How long a layover you need at DENLounges
- •United Clubs (Concourse B)
- •Amex Centurion Lounge (Concourse C)
- •Capital One Lounge
Sleep, showers and hotels
- •The Westin Denver International Airport, connected to the terminal
Parking at DEN
- •Pikes Peak and Mt. Elbert shuttle lots, the cheapest
- •Economy lots and garage
- •Garages next to the terminal
Rates change with demand and booking ahead is usually cheaper: check DEN's official site.
DEN tips
- •United is mostly in Concourse B, Southwest in Concourse C and Frontier in Concourse A.
Can you leave DEN on a layover?
With at least 3 h 30 min between flights, yes. Here's where the time goes.
- Off the plane and out of the airport20 min
- To Union Station, downtown Denver and back, the fastest way1 h
- Time in town worth the trip1 h
- Back through security to your gate1 h
- Layover you need3 h 30 min
Keep your bags checked through and carry your boarding pass for the next flight. On a long layover, a hotel day room or lounge can be a better use of the time than a rushed trip into town.
Airlines at DEN
Major airlines that fly from DEN (not a complete list). Check the bag rules before you pack.
- United Airlines Carry-on 22 × 14 × 9 in Bag fees
- Southwest Airlines Carry-on 24 × 16 × 10 in Bag fees
- Frontier Airlines Carry-on 24 × 16 × 10 in Bag fees
- American Airlines Carry-on 22 × 14 × 9 in Bag fees
- Delta Air Lines Carry-on 22 × 14 × 9 in Bag fees
- Alaska Airlines Carry-on 22 × 14 × 9 in Bag fees
- JetBlue Carry-on 22 × 14 × 9 in Bag fees
- Sun Country Airlines Carry-on 24 × 16 × 11 in Bag fees
- Air Canada Carry-on 55 × 40 × 23 cm Bag fees
- WestJet Carry-on 53 × 38 × 23 cm Bag fees
- British Airways Carry-on 56 × 45 × 25 cm Bag fees
- Lufthansa Carry-on 55 × 40 × 23 cm Bag fees
- Icelandair Carry-on 55 × 40 × 20 cm Bag fees
DEN airport FAQ
The quickest option is the RTD A Line commuter train to Union Station: about 37 minutes for about $10.50. A taxi takes 30–45 min (about $60–$75).
Sources
Last verified Oct 17, 2026. Fares, lounges, airlines and parking change; check with the operator or airport before you travel.
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