Quick Answer
For most travelers, the RTD A-Line commuter train is the best way to get from Denver Airport (DEN) to Downtown Denver. It takes 37 minutes, costs $10.50 one-way, and runs directly to Denver Union Station every 15-30 minutes from 3:15 AM to 1:15 AM. It's the optimal balance of speed, cost, and convenience. The cheapest option is the SkyRide Bus (Route AF) also at $10.50, but it's slower. Taxis and ride-shares are the most convenient but expensive ($35-$65).
The A-Line Commuter Train: Fast & Direct to Downtown
The University of Colorado A-Line is Denver's dedicated airport rail link, operated by the Regional Transportation District (RTD). Since its 2016 opening, it has become the preferred choice for over 40% of airport travelers heading to the city center due to its reliability and speed.
Step-by-Step Guide to Using the A-Line
- Find the Station: From baggage claim, follow signs to "Transit Center" or "Train to City". Take the escalators/elevators to Level 5 (the Transit Level) of the Jeppesen Terminal.
- Purchase Tickets: Use the self-service vending machines. Options include:
- One-Way Airport Fare: $10.50 (valid for one trip to/from the airport).
- Regional Day Pass: $10.50 (covers your airport trip + unlimited rides on all RTD services for the rest of the calendar day—incredible value).
- Validate & Board: You must validate your ticket or mobile pass before boarding. Tap it at the validador on the platform. Trains depart every 15 minutes during peak hours and every 30 minutes during early morning/late night.
- The Ride: Enjoy a smooth, 37-minute journey with free WiFi, power outlets, and luggage racks. The train makes several stops but does not require transfers to reach Downtown.
- Arrive at Union Station: Disembark at the final stop, Denver Union Station. This historic hub is centrally located in Lower Downtown (LoDo), with easy connections to light rail, buses, taxis, and rideshares. Major hotels like The Crawford and The Oxford are within a 5-10 minute walk.
A-Line Schedule & Key Data
| Direction | First Train from DEN | Last Train from DEN | Frequency (Peak) | Frequency (Off-Peak) | Travel Time |
|---|---|---|---|---|---|
| To Union Station | 3:15 AM | 1:15 AM | Every 15 min | Every 30 min | 37 min |
Source: RTD Official A-Line Schedule
Why the A-Line is the Top Recommendation
Pros: Predictable travel time (unaffected by I-70 traffic), direct downtown access, frequent service, cost-effective, and integrated with the city's transit network. Cons: Not 24-hour; the last train departs at 1:15 AM. Not ideal for destinations far from Union Station without a secondary connection.
SkyRide Bus: The Budget-Friendly Workhorse
For travelers on an extreme budget or those arriving during the train's 2-hour overnight closure, the RTD SkyRide bus service provides a reliable, albeit slower, connection to Downtown and beyond.
Primary Downtown Route: Route AF
- Route: DEN Airport → Denver Union Station Bus Concourse.
- Fare: $10.50 (identical to the train).
- Travel Time: Approximately 55-70 minutes, heavily dependent on I-70 and downtown traffic.
- Schedule: 24/7 service, but frequency drops to every 60+ minutes between 1 AM and 4 AM. Check the RTD Route AF schedule for precise times.
- Where to Board: At the DEN Transit Center (Level 5), locate the island for Route AF.
Other Useful SkyRide Routes
| Route | Destination | Fare | Key Notes |
|---|---|---|---|
| AB/AB1 | Boulder | $10.50 | Direct to Boulder Transit Center. Essential for University of Colorado travelers. |
| AT | Westminster / Thornton | $10.50 | Serves northern suburbs. |
Bus vs. Train Decision: Choose the bus if your flight lands between 1:15 AM - 3:15 AM, if you are hyper-sensitive to cost and have extra time, or if your final destination is closer to a bus stop than Union Station. Otherwise, the train is almost always superior.
Private Transfers & Shared Shuttles
For a pre-booked, guaranteed service, private and shared shuttle options are available.
- Private Car/Van Service: Companies like SuperShuttle (by Groundlink) and local limousine services offer meet-and-greet options. Cost: $80-$150+ for a sedan to downtown. Best for business travel or families wanting maximum comfort and certainty.
- Shared Ride Vans: While traditional shared shuttle vans have largely been replaced by ride-sharing, some services still operate. They can be cost-effective for solo travelers to specific hotels but often involve multiple stops, extending travel time to 60-90 minutes.
Recommendation: For most leisure travelers, the predictability of the A-Line train or the on-demand nature of a rideshare outweighs the need to pre-book a private transfer.
Ticket Options & Comprehensive Cost Comparison
This table summarizes all key data to help you decide. All prices are in USD for a one-way trip to Downtown Denver.
| Transport Method | Cost (One-Way) | Avg. Travel Time | Operational Hours | Best For | Our Rating |
|---|---|---|---|---|---|
| RTD A-Line Train | $10.50 | 37 min | 3:15 AM - 1:15 AM | Most travelers: Best value for speed & price. | ★★★★★ (Best Overall) |
| RTD SkyRide Bus (Route AF) | $10.50 | 55-70 min | 24/7 (reduced night frequency) | Extreme budget, overnight arrivals (1:15-3:15 AM). | ★★★☆☆ (Best for Budget/Overnight) |
| Rideshare (UberX/Lyft) | $35 - $65 (surge variable) | 35-50 min | 24/7 | Groups of 3+, late night, lots of luggage. | ★★★☆☆ (Most Convenient) |
| Taxi (Flat Rate) | $61.25 | 35-50 min | 24/7 | Those preferring fixed fare, no app needed. | ★★☆☆☆ (Fixed Price Convenience) |
| Private Car Service | $80 - $150+ | 35-50 min | By reservation | Business travel, special occasions. | ★★☆☆☆ (Luxury/Pre-booked) |
Money-Saving Tip: If you'll use transit again on the day you arrive, buy the $10.50 Regional Day Pass instead of a one-way ticket. It's the same price but gives you unlimited rides for the rest of the day.
Traveler Tips & Local Advice
Navigate Like a Pro
- Altitude Adjustment: Denver is the "Mile High City." Drink plenty of water, especially if coming from sea level, to ease altitude adjustment during your journey.
- Luggage Strategy: The A-Line train has ample space, but if you have oversized items (e.g., ski/snowboard bags), consider rideshare or taxi. Alternatively, services like LuggageAgent can deliver bags to your hotel.
- Denver Union Station Hub: Upon arrival, don't rush off. The station is a destination itself with great restaurants, bars, and a helpful Visitor Information Booth. Free public WiFi is available.
- Connect for Free: Within Downtown Denver, the 16th Street Free MallRide bus runs along the 16th Street pedestrian mall, connecting Union Station with the Capitol. It's a great way to get oriented.
- Winter Travel Warning: While the A-Line is highly reliable, severe snowstorms can occasionally cause delays. Allow extra time and check the DEN Airport Status and RTD Service Alerts during winter months.
- Peak Event Times: During major conventions or Broncos games, rideshare prices surge, and downtown traffic thickens. The train remains your most reliable bet during these times.
FAQs: Denver Airport to Downtown Transit
What is the fastest way to get from Denver Airport to Downtown?
The RTD A-Line commuter train is the fastest and most reliable public transit option, taking exactly 37 minutes from DEN Airport Station to Denver Union Station in the heart of Downtown. Trains run every 15-30 minutes from 3:15 AM to 1:15 AM.
What is the cheapest transportation from DEN to Downtown Denver?
The RTD SkyRide bus (Route AF) is the cheapest at $10.50 one-way. However, the A-Line train ($10.50) offers better speed and frequency for the same price, making it the best value overall.
Is there a direct train from Denver Airport to the city center?
Yes. The University of Colorado A-Line is a dedicated, non-stop commuter rail connecting Denver Airport (DEN) Station directly to Denver Union Station. No transfers are needed.
How much is a taxi or Uber from Denver Airport to Downtown?
Taxis have a flat rate of $61.25 to Downtown Denver. Ride-sharing apps like Uber & Lyft cost between $35-$65, depending on demand, time of day, and vehicle type. This is significantly more expensive than the $10.50 train.
Can I use public transit late at night or very early in the morning?
The A-Line train runs from 3:15 AM to 1:15 AM. For flights arriving between 1:15 AM and 3:15 AM, the only public option is the 24-hour SkyRide bus (Route AF), which has limited late-night frequency. Taxis and ride-shares are available 24/7.
Where do I buy tickets for the A-Line train at the airport?
Buy tickets at the vending machines on the Transit Level (Level 5) of DEN's Jeppesen Terminal, before descending to the train platform. You can use cash, credit/debit cards, or the RTD MyRide mobile app. Tickets must be validated before boarding.
Is the Denver airport train good for travelers with lots of luggage?
Yes. The A-Line train cars have dedicated luggage racks and wide aisles. The airport station has elevators and escalators. For excessive luggage, consider a taxi/rideshare or the airport's luggage delivery service to your hotel.
Should I buy a regional day pass for public transit in Denver?
If you plan to use public transit more than once on the same day (e.g., arriving and then exploring), the Regional Day Pass ($10.50) is excellent value. It covers your A-Line trip to Downtown and unlimited rides on all local buses and trains for the rest of the day.