Miles between Flagstaff, AZ and Boulder, CO

There are
688 mi
from Flagstaff, AZ to Boulder, CO

That's the driving distance. It would take 13 hours 24 mins to go from Flagstaff, Arizona to Boulder, Colorado.

The flight distance (direct flight from Flagstaff, AZ to Boulder, CO) is 481.52 mi.

688 mi = 1,106.90 kms