Airport Hubs:
DEN → Boulder (Downtown Boulder, Pearl St & CU Campus) Updated for 2026

Denver Airport to Boulder: 2026 Transfer Options

Distance 70 km
Fastest 55 min
From $10.00 USD
Top Pick RTD AB1 Regional Express Bus (Direct to Boulder)
Quick 10-Second Verdict:

The premier transit option is the RTD Route AB1 Express Bus, departing hourly from the DEN transit center directly to Downtown Boulder (14th & Walnut) in 65–75 minutes for only $10.00 USD. An Uber or Lyft to Boulder costs $75–$110 USD, taking 50–70 minutes via the E-470 toll highway or US-36.

Boulder sits 70 km (44 miles) northwest of Denver Airport at the foot of the Flatirons mountains, home to the University of Colorado (CU) and a thriving tech startup ecosystem. The RTD AB1 bus provides a direct connection without transferring in downtown Denver.

All Transfer Options Compared (2026 Fares)

Transport Option Typical Time 2026 Fare Frequency Best For Booking / Info
RTD AB1 Regional Express Bus Best Overall
65–80 min
$10.00 USD
$10.00 USD (~€9.25)
 Every 60 min Best value, direct connection to CU Boulder campus and Pearl Street See Boarding Steps ↓
Uber / Lyft / Private Airport Car Door-to-Door
50–70 min
$75 – $110 USD
$75 – $110 USD (~€70 – €102)
 On demand Direct hotel drop-off with bulky gear, outdoor equipment, or family See Boarding Steps ↓

Detailed Step-by-Step Transfer Options

Option #1 Best Overall

RTD AB1 Regional Express Bus

$10.00 USD $10.00 USD (~€9.25)
Travel time 65–80 min
Frequency Every 60 min
Operating hours 06:00 – 23:20
Where to buy tickets RTD ticket machines at transit center platform or exact cash on bus.
Main advantage: Direct non-stop highway bus; comfortable coach seats with Wi-Fi; only $10.00 USD.
Keep in mind: Hourly departures; requires waiting if you miss a bus.

Step-by-step from arrivals:

  1. Head to Level 1 Transit Center beneath the Westin Hotel.
  2. Locate Gate 8 for Route AB1 (Boulder).
  3. Scan your $10.00 ticket and stow heavy bags in the luggage hold.
  4. Ride directly to CU Boulder campus or Downtown Boulder Station (14th & Walnut).
Option #2 Door-to-Door

Uber / Lyft / Private Airport Car

$75 – $110 USD $75 – $110 USD (~€70 – €102)
Travel time 50–70 min
Frequency On demand
Operating hours 24/7 continuous
Where to buy tickets Order via app on Level 5 Island 5.
Main advantage: Direct door-to-door service to your Boulder hotel or rental; takes ~55 minutes.
Keep in mind: Expensive fare plus Northwest Parkway toll fees.

Step-by-step from arrivals:

  1. Order ride via app on Level 5.
  2. Head northwest via E-470 / Northwest Parkway and US-36 into Boulder.
ARRIVAL CONNECTIVITY & RIDE-HAILING TIP

Need Mobile Data at the Terminal for Uber / Lyft & Maps?

Airport Wi-Fi often drops outside the terminal curb where Uber / Lyft pickup zones are located. Install a local eSIM before your flight so you can order a ride, translate station signs, and show digital train QR tickets immediately after landing.

Get United States eSIM on Airalo →Compare United States Airport eSIM on Klook →
STRESS-FREE DOOR-TO-DOOR OPTION

Prefer a Driver Waiting at Denver (DEN) Arrivals?

Traveling with heavy suitcases, young children, or landing after midnight? Pre-book a fixed-price private airport transfer or express rail pass on Klook with instant confirmation and no meter haggling.

Check Denver Transfers & Rail Passes on Klook →View Airport & City Hotels on Klook →

Tickets, Luggage & Late-Night Arrivals

How Tickets & Payments Work

Buy an RTD Airport Day Pass ($10.00 USD) at vending machines at the DEN transit center or pay exact cash / tap mobile ticket on the AB1 bus. Youth 19 and under ride free.

Traveling with Suitcases

AB1 regional buses feature undercarriage luggage bays loaded by the driver.

Arriving After Midnight

Last AB1 bus departs DEN around 23:20. Late-night arrivals should use Uber/Lyft or pre-book a shared van.

Common Mistakes & Airport Scams to Avoid

  • Taking the A-Line train into downtown Denver to reach Boulder — this adds an hour; the AB1 bus goes directly from DEN to Boulder along the highway.
  • Watch out for aggressive private shuttle touts on Level 5 claiming train delays. The RTD A-Line train station is located directly under the Westin Hotel on the south end of Jeppesen Terminal with automated ticket machines.

Frequently Asked Questions (FAQ)

Where do I catch the bus to Boulder at Denver Airport?

At the DEN Transit Center on Level 1 beneath the Westin Hotel (Gate 8).

Other Popular Destinations from Denver International Airport (DEN)