Quick Answer
For most travelers, the RTD A-Line commuter train is the best overall way to get from Denver Airport (DEN) to Union Station. It's fast (37 minutes), affordable ($10.50), reliable, and drops you in the heart of downtown. The cheapest option is the public bus (Route AF) at $10.50, but it takes longer. For door-to-door convenience late at night or with a group, rideshares (Uber/Lyft) or taxis are the go-to, costing $45-$80+ depending on demand.
The RTD A-Line Train: The Best Public Transit Option
The Regional Transportation District (RTD) A-Line is a dedicated commuter rail line connecting Denver International Airport directly to Denver Union Station. Since its 2016 opening, it has become the preferred choice for its combination of speed, price, and convenience.
Step-by-Step Guide & Key Details
- Finding the Station: From baggage claim, follow signs for "Train to City" leading to the DEN Transit Center. A free terminal train connects the concourses to the main terminal.
- Ticket Purchase: Buy tickets at station vending machines (cash/credit) or via the RTD MyRide app. Select "Airport Fare Zone" for the correct $10.50 rate.
- Boarding & Journey: Trains run every 15 minutes during peak hours and every 30 minutes late at night. The 37-minute ride is scenic, passing through the plains before arriving underground at Union Station.
- At Union Station: Disembark into the historic station, a hub for local buses, light rail, and the Free MallRide to the 16th Street Mall.
| Aspect | Details |
|---|---|
| One-Way Fare | $10.50 (Airport Fare) |
| Travel Time | ~37 minutes (end-to-end) |
| Operating Hours | ~3:15 AM to ~1:00 AM (First/Last from DEN) |
| Frequency | Every 15 min (peak), Every 30 min (off-peak/night) |
| Luggage | Ample racks and space; designed for travelers. |
| WiFi & Power | Free WiFi and power outlets available onboard. |
Deep Analysis: Why It's The Top Recommendation
Reliability vs. Traffic: Unlike road-based options, the train's schedule is immune to the notorious congestion on I-70 and downtown streets, providing a predictable 37-minute journey regardless of time of day.
Cost-Effectiveness: At $10.50, it undercuts all private transportation by 75% or more. For a group, the savings are massive compared to multiple taxi fares.
The "Union Station Advantage": Arriving at Union Station isn't just an endpoint; it's a seamless transition to the rest of Denver. You can connect to RTD's entire network, catch an Amtrak train, or walk to numerous hotels (The Crawford, Kimpton Born) within minutes.
Considerations: The main drawback is its limited late-night service. Travelers arriving after 1 AM must have a backup plan. Also, during major events or peak travel days, trains can be crowded.
Airport Shuttles, Shared Rides & Public Buses
This category includes shared-van shuttles, hotel shuttles, and public bus alternatives. They offer a middle ground between the train's low cost and a taxi's door-to-door service.
1. Shared-Ride Vans & Door-to-Door Shuttles
Companies like SuperShuttle (by appt only) and Colorado Mountain Express (CME) provide shared rides to specific addresses or hotels. You share a van with other passengers heading in a similar direction.
- Cost: $25 - $45 per person to downtown. Often cheaper than a solo taxi but more expensive than the train.
- Process: Book in advance online or at airport counters. After collecting luggage, call the provider. You may have to wait for the van to fill and make other stops.
- Best For: Travelers going to a hotel not near Union Station, those avoiding train stairs/lifts with heavy bags, or when the train isn't running.
- Source: SuperShuttle Official Site.
2. Hotel Shuttles
Many downtown and airport-area hotels offer complimentary shuttle service. This is often the most convenient free option if your hotel provides it.
- How to Use: After baggage claim, call your hotel. Shuttles typically pick up at Level 5, Island 4 of the terminal. Always confirm availability in advance.
- Coverage: Primarily serves hotels near the airport or along major corridors. Few downtown hotels offer direct airport shuttles due to the efficiency of the A-Line.
3. Public Bus (RTD Route AF - SkyRide)
The RTD Route AF (Airport Fare) bus is the most budget-conscious public transit alternative to the train.
| Feature | Route AF Bus | A-Line Train |
|---|---|---|
| Fare | $10.50 | $10.50 |
| Travel Time to Downtown | ~55-70 minutes | ~37 minutes |
| Route | Makes multiple stops along Peña Blvd & I-70 | Non-stop on dedicated rail |
| Frequency | Less frequent than train | More frequent |
| Best For | Extreme budget travelers, going to stops along its route | Almost all travelers heading to Union Station/downtown |
Analysis: While the fare is identical, the bus adds significant time and is subject to traffic. It's only recommended if your final destination is along its specific route (e.g., the 40th & Airport station for a light rail transfer) or if you are trying to save every possible penny and time is no concern.
Private Car, Limousine & SUV Service
For the ultimate in comfort, privacy, and reliability, pre-booked private transportation is available. This is a premium service for business travel, special occasions, or large groups.
Service Tiers & Providers
- Executive Sedan: A luxury car (Lincoln Town Car, Mercedes S-Class) for 1-3 passengers with a professional driver. Cost: $90 - $130.
- Private SUV/Van: For families or groups of 4-10 (e.g., Chevrolet Suburban, Sprinter van). Cost: $120 - $200+.
- Limo Service: Stretch limousines for special events. Cost: $150+ per hour.
Providers: Companies like Denver Black Car, Zip Transportation, and national services like Blacklane operate at DEN.
Comprehensive Analysis: Value Proposition & Caveats
Advantages:
- Meet-and-Greet: The driver meets you at baggage claim with a sign, assists with luggage.
- Fixed, All-Inclusive Price: No surprise surge pricing or meter ticks in traffic. Gratuity is often included.
- Flight Tracking: Providers monitor your flight for delays and adjust pickup time automatically.
- Immediate Departure: No waiting for a shared van to fill or a rideshare to arrive.
Disadvantages & Considerations:
- High Cost: Typically 2-3x the price of a standard taxi or rideshare.
- Advance Booking Required: Not suitable for spontaneous decisions.
- Cancellation Policies: Often have strict cancellation windows (e.g., 24-48 hours in advance).
Who It's For: Corporate travelers on expense accounts, families with young children wanting pre-installed car seats, large groups, wedding parties, or anyone prioritizing a seamless, stress-free arrival above all else.
Side-by-Side Comparison: Denver Airport to Union Station
| Transport Method | Avg. Travel Time | Avg. Cost (One Way) | Best For | Key Consideration |
|---|---|---|---|---|
| RTD A-Line Train (BEST OVERALL) | 37 min | $10.50 | Most travelers, solo, couples, budget-conscious. | Limited late-night service. Unbeatable value for speed/price. |
| RTD Route AF Bus (MOST BUDGET) | 55-70 min | $10.50 | Extreme budget travel, specific route stops. | Slow, subject to traffic, less frequent. |
| Shared Shuttle (e.g., SuperShuttle) | 45-75 min+ | $25 - $45 | Door-to-door to non-downtown hotels, solo travelers avoiding train. | Time varies with other passenger stops; advance booking needed. |
| Taxi | 35-60 min* | $55 - $75 | Late-night arrivals, immediate availability, cash payments. | *Heavily traffic-dependent. Metered fare. |
| UberX / Lyft Standard | 35-60 min* | $45 - $85+ | App convenience, groups of 3+, off-peak travel. | *Traffic-dependent. Price surges dramatically during high demand. |
| Private Car Service | 35-60 min* | $90 - $200+ | Business, luxury, families/groups, special occasions. | *Traffic-dependent. Requires advance booking. Fixed price. |
*Travel time by road is highly variable. 35 min is best-case (midnight). Rush hour (7-9 AM, 4-6 PM) can easily take 60-90 minutes.
Traveler Tips, Tricks & Local Experience
Go beyond the basic logistics with these insights from frequent travelers and locals.
1. Mastering the A-Line Like a Pro
- Download the RTD MyRide App: Purchase and activate your ticket on your phone before you board. It's faster than the vending machines.
- Validate Your Ticket: If you use a paper ticket from a machine, tap it on the validator pillar on the platform before boarding. Fines for riding without a validated ticket are steep.
- Seat Strategy: For the best views of the front/back of the train, sit in the first or last car. For quickest exit at Union Station, sit in the middle cars.
- Union Station Arrival: The train arrives underground. Take the escalators up to the Great Hall for restaurants, shops, and taxi/rideshares. Light rail and buses are on the adjacent platforms.
2. Navigating Road Traffic & Construction
Denver's infrastructure is constantly evolving. Before choosing a road option, check traffic on Google Maps, Waze, or COtrip.org. Construction on Peña Blvd or I-70 can cause unexpected delays, especially on weekends.
3. Luggage & Special Items Strategy
- Ski/Snowboard Bags: The A-Line train accommodates them in luggage areas. Shuttles and private SUVs are also good options. Inform your provider in advance.
- Oversized or Fragile Items: Private car service is the most reliable for careful handling and guaranteed space.
- Minimal Luggage & Speed: If you only have a carry-on, you can be on a departing train within 15-20 minutes of your plane's door opening if you move quickly.
4. Weather Contingencies
Denver gets snowstorms, primarily in winter and spring. During major storms:
- Train is King: The A-Line is almost always more reliable than roads during snow. It's the top choice in poor weather.
- Road Delays: Expect taxi/rideshare fares to surge, availability to drop, and travel times to double or triple. Allow massive extra time.
- Flight Cancellations: If your flight is cancelled and you're rebooked for the next day, some airport hotels offer "distressed traveler" rates. Inquire at the hotel counters in the terminal.
5. Money-Saving Combinations
Consider hybrid approaches: Take the A-Line to Union Station ($10.50), then a short, cheap Uber/Lyft or local bus to your final destination if it's not within walking distance. This is almost always cheaper than a rideshare the entire way from the airport.
FAQs: Denver Airport to Union Station Transportation
Is there a direct train from Denver Airport to Union Station?
Yes, the RTD A-Line commuter train provides a direct, non-stop rail service between Denver Airport Station (located at the airport's Transit Center) and Union Station in downtown Denver. The journey takes approximately 37 minutes.
What is the cheapest way to get from Denver Airport to downtown?
The RTD A-Line train is the cheapest public transit option at $10.50 for a one-way fare. Shared airport shuttles like SuperShuttle start around $25-$30, which can be cheaper than a solo taxi if you're traveling alone, but the train remains the most cost-effective direct option.
How late does the A-Line train run from the airport?
The last eastbound A-Line train from Denver Airport (DEN) to Union Station typically departs just after 1:00 AM. The first train of the day departs around 3:15 AM. Always check the official RTD schedule for the most current times, especially on weekends and holidays.
Is Uber or Lyft cheaper than a taxi from DEN?
It depends on demand and time of day. During non-peak hours, rideshare services (UberX, Lyft Standard) are often slightly cheaper than a traditional taxi, with fares to Union Station ranging from $45-$65. During peak hours, holidays, or bad weather, surge pricing can make rideshares more expensive than a fixed-rate taxi.
Where do I catch the A-Line train at Denver Airport?
The Denver Airport Station is located at the DEN Transit Center, which is on the south side of the Jeppesen Terminal (main terminal). Follow signs for 'Train to City' or 'Transit Center' from the baggage claim level. You can take a free automated train (the Inter-terminal Train) from any concourse to the Terminal, then walk or take a shuttle to the Transit Center.
What if I arrive very late or early when the train isn't running?
For late-night arrivals (after 1 AM), your main options are 24/7 taxis, rideshares (Uber/Lyft), or pre-booked private car service. Some shared shuttle services may have limited late-night availability, but advance booking is crucial. For very early arrivals (before 3:15 AM), you will need to wait for the first train or use the aforementioned road options.
Is the A-Line train good for travelers with lots of luggage?
Yes, the A-Line trains are designed for airport travelers. They feature dedicated luggage racks near the doors, spacious aisles, and level boarding from the platform. It is a manageable option even with multiple suitcases, though during peak times, space can fill up.
How does traffic affect the travel time by road?
Traffic on I-70 and into downtown Denver can significantly impact travel time. A trip that takes 35 minutes at 3 AM can easily take 60-90 minutes during weekday rush hours (7-9 AM, 4-6 PM) or during major events. The A-Line train's 37-minute schedule is reliable and unaffected by road traffic.