Miles between Boulder, CO and Williston, ND

There are
670 mi
from Boulder, CO to Williston, ND

That's the driving distance. It would take 12 hours 48 mins to go from Boulder, Colorado to Williston, North Dakota.

The flight distance (direct flight from Boulder, CO to Williston, ND) is 567.79 mi.

670 mi = 1,078.00 kms