Miles between Boulder, CO and Portage, MI

There are
1,147 mi
from Boulder, CO to Portage, MI

That's the driving distance. It would take 20 hours 24 mins to go from Boulder, Colorado to Portage, Michigan.

The flight distance (direct flight from Boulder, CO to Portage, MI) is 1,033.81 mi.

1,147 mi = 1.61 kms