Rome2Rio

Keystone to Boulder buses

Find Transport to Boulder

View schedule

Trip Overview

The average bus between Keystone and Boulder takes 4h 21m and the fastest bus takes 3h 47m. The bus service runs several times per day from Keystone to Boulder. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.

4h 21m
Duration
142 mi
Distance
Every 4 hours
Frequency

Bus via Denver Airport (DEN)

best
  1. Take the bus from Keystone to Denver International Airportbus bus Epic Mountain Express
  2. Take the bus from Denver Airport Station Gate 8 to Broadway & Pleasant Stbus bus Ab1
4h 2m

Keystone to Boulder bus times

Buses run every 4 hours between Keystone and Boulder. The earliest departure is at 7:20 AM in the morning, and the last departure from Keystone is at 3:30 PM which arrives into Boulder at 7:57 PM. All services require a transfer at Denver International Airport and take an average of 4h 21m. The schedules shown below are for the next available departures.

Departing Saturday, October 24, 2026

  •  → 

    Epic Mountain ExpressRegional Transport4h 27m • 1 change

Departing Sunday, October 25, 2026

  •  → 

    Arrives next day

    Epic Mountain ExpressRegional Transport14h 13m • 1 change

Departing Monday, October 26, 2026

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 56m • 1 change
  • Show more

Departing Tuesday, October 27, 2026

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 56m • 1 change
  • Show more

Departing Wednesday, October 28, 2026

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 56m • 1 change
  • Show more

Departing Thursday, October 29, 2026

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 56m • 1 change
  • Show more

Departing Friday, October 30, 2026

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 55m • 1 change

  •  → 

    Epic Mountain ExpressRegional Transport3h 56m • 1 change
  • Show more

Frequently asked questions

Want to know about travelling from Keystone to Boulder? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.

Map of how to get from Keystone to Boulder.ExpandLaunch map view
  • Distance: 142 mi
  • Duration: 4h 21m

What companies run services between Keystone, Summit County, CO, USA and Boulder, CO, USA?

You can take a bus from Keystone to Broadway & Pleasant St via Denver International Airport and Denver Airport Station Gate 8 in around 4h 2m.

Operators