Miles between Boulder, CO and Caldwell, ID

There are
831 mi
from Boulder, CO to Caldwell, ID

That's the driving distance. It would take 14 hours 1 min to go from Boulder, Colorado to Caldwell, Idaho.

The flight distance (direct flight from Boulder, CO to Caldwell, ID) is 638.71 mi.

831 mi = 1,337.23 kms