Rome2Rio

Boulder to Flagstaff buses

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Trip Overview

The average bus between Boulder and Flagstaff takes 20h 29m and the fastest bus takes 16h 35m. The bus runs, on average, 5 times per week from Boulder to Flagstaff. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.

20h 29m
Duration
800 mi
Distance
5 times a week
Frequency

Boulder to Flagstaff bus times

Buses run 5 times a week between Boulder and Flagstaff. The earliest departure is at 6:30 PM in the evening, and the last departure from Boulder is at 11:00 PM which arrives into Flagstaff at 11:05 AM. All services require a transfer at Union Station and take an average of 20h 29m. The schedules shown below are for the next available departures.

Departing Saturday, November 14, 2026

  •  → 

    Arrives +2 days

    Regional TransportGreyhound USAGreyhound USA36h 5m • 2 changes

Departing Monday, November 16, 2026

  •  → 

    Arrives next day

    Regional TransportGreyhound USAGreyhound USA16h 35m • 2 changes

Departing Tuesday, November 17, 2026

  •  → 

    Arrives next day

    Regional TransportGreyhound USAGreyhound USA16h 35m • 2 changes

Departing Friday, November 20, 2026

  •  → 

    Arrives next day

    Regional TransportGreyhound USAGreyhound USA16h 35m • 2 changes

Frequently asked questions

Want to know about travelling from Boulder to Flagstaff? 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 Boulder to Flagstaff.ExpandLaunch map view
  • Distance: 799.8 mi
  • Duration: 20h 29m

What companies run services between Boulder, CO, USA and Flagstaff, AZ, USA?

You can take a bus from Downtown Boulder Station Gate 1 to Flagstaff Bus Station via Union Station, Denver Union Station, and Albuquerque Bus Station in around 17h.

Operators