Navigating the Regional Transportation District (RTD) A Line from Denver International Airport to downtown is straightforward once you know the route, schedule, and ticketing system. Operating daily from roughly 3:00 a.m. to 1:00 a.m., the commuter rail covers twenty-three miles in thirty-seven minutes, bypassing highway traffic completely for a flat fee of $10.50.
Whether you're landing for a weekend trip or catching an early morning flight out of DEN, understanding the station layout and payment options saves time and prevents confusion. Let's break down everything you need to navigate the line like a local.
RTD A Line Route and Station Map Overview
The A Line operates as a direct commuter rail corridor linking the main terminal of Denver International Airport to the historic Denver Union Station in Lower Downtown (LoDo). Along the 23-mile stretch, the train makes brief stops at six intermediate stations.
- Denver Airport Station: Located at the south end of the main terminal, directly beneath the Westin Hotel.
- 61st & Peña Station: Serves developing commercial and residential areas on the outer edge of Denver.
- 40th Ave & Airport Blvd – Gateway Park: Offers connections to local bus routes and nearby corporate hubs.
- Peoria Station: A major transfer point connecting commuters to the R Line, which runs toward Aurora and the Denver Tech Center.
- Central Park Station: Serves the bustling Central Park neighborhood (formerly Stapleton), providing extensive parking facilities.
- 40th & Colorado Station: Provides transit connections to industrial and evolving residential zones.
- 38th & Blake Station: Situated in the River North (RiNo) Arts District, ideal for accessing local breweries, galleries, and restaurants.
- Denver Union Station: The downtown terminus, offering seamless transfers to regional buses, free mall transit, light rail lines, and Amtrak.
For a visual breakdown of connections, you can review the official route layouts on the RTD Denver Schedules Page.
Schedule, Frequency, and Operating Hours
Trains run consistently throughout the day, but departure intervals shift depending on the hour. During peak commuting windows, you won't wait long on the platform.
- Peak Hours (5:00 a.m. to 8:00 p.m.): Trains arrive every 15 minutes.
- Off-Peak Hours (Early morning and late evening): Frequency drops to every 30 minutes.
If you have a very early flight or a late-night arrival, verify the exact timetable on the Visit Denver Transportation Guide before heading to the platform. The first trains pull out around 3:00 a.m. from both ends of the line, and service wraps up shortly after midnight.
Fares, Tickets, and Payment Methods
Riding the A Line requires an Airport-level fare, which differs from standard local light rail tickets. A standard one-way ticket or a Day Pass costs $10.50. Because the Day Pass covers all regional and airport zones through 2:59 a.m. the following day, it's usually the best value if you plan to use other RTD buses or trains during your first day in the city.
- Mobile Ticketing: Download the official RTD MyRide app or use partnered apps like Transit to purchase and activate digital tickets on your phone.
- Station Kiosks: Ticket vending machines are located on every station platform. They accept cash, credit cards, and debit cards. Make sure to buy and validate or activate your ticket before boarding the train platform.
Discounted fares are available for seniors 65+, individuals with disabilities, and youth aged 19 and under through specific program guidelines outlined by the Colorado Department of Transportation.
Luggage, Accessibility, and Boarding Tips
Traveling with heavy bags on public transit can be stressful, but the A Line cars are explicitly designed with airport travelers in mind.
- Baggage Storage: Trains feature dedicated luggage towers, overhead racks, and open floor space near the doors. You're responsible for loading and unloading your own bags.
- Platform Access: Station platforms feature level-boarding design, meaning the train floor lines up evenly with the platform surface. This makes rolling heavy suitcases or strollers aboard effortless without navigating steps.
- Accessibility: Every car includes designated wheelchair securement spaces, audio-visual stop announcements, and wide entry doors. Elevators at Denver Airport Station connect the transit platform directly to the terminal check-in and baggage claim levels.
Common Mistakes to Avoid
First-time visitors often run into a few predictable snags when taking the A Line. Keep these tips in mind to ensure a smooth trip:
- Buying the wrong ticket type: Don't purchase a standard $3.00 local ticket if you're coming from the airport. Fare inspectors routinely check tickets, and improper fare tickets result in citations.
- Rushing past validation: Ticket machines are on the platform, not inside the train. You must buy your ticket before stepping through the gate or onto the boarding zone.
- Ignoring luggage logistics: During peak evening rush hours, trains can fill up with local commuters. Keep your bags close to your seat so aisles remain clear for boarding passengers.
Frequently Asked Questions
Where exactly is the train station at Denver International Airport?
The station sits directly outside the main terminal building on the south end. As you exit baggage claim on Level 5, follow the overhead signs toward the Westin Denver International Airport Hotel. The glass-enclosed transit hall sits right past the hotel entrance.
Can I use my smartphone to pay for the ride?
Yes. You can buy tickets digitally using the RTD mobile ticketing app or partner transit apps on your phone. Just make sure to activate the ticket right before you board.
Are bikes allowed on the A Line train?
Yes. Each rail car includes designated bicycle racks. You don't need a special permit for standard bikes, but you must load and secure your bicycle yourself in the designated multi-use areas.
How do I transfer to light rail lines once I reach Union Station?
Denver Union Station serves as a central hub for multiple light rail lines (such as the D, H, and E lines) and regional buses. Underground bus concourses and surface light rail platforms are clearly marked with directional signage right outside the historic station hall.
