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Keystone to Boulder buses

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Trip Overview

The average bus between Keystone and Boulder takes 4h 23m 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 23m
Duration
142 mi
Distance
5 times a day
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 5 times a day 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 7:17 PM. All services require a transfer at Denver International Airport and take an average of 4h 23m. The schedules shown below are for the next available departures.

Departing Monday, October 26, 2026

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    Epic Mountain ExpressRegional Transport3h 47m • 1 change

Departing Tuesday, October 27, 2026

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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

Departing Wednesday, October 28, 2026

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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

Departing Thursday, October 29, 2026

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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

Departing Friday, October 30, 2026

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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    Epic Mountain ExpressRegional Transport3h 55m • 1 change

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

Departing Saturday, October 31, 2026

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    Epic Mountain ExpressRegional Transport4h 5m • 1 change

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    Epic Mountain ExpressRegional Transport4h 34m • 1 change

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    Epic Mountain ExpressRegional Transport4h 4m • 1 change

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    Epic Mountain ExpressRegional Transport4h 39m • 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 23m

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