Miles between Boulder, CO and Sioux Falls, SD

There are
642 mi
from Boulder, CO to Sioux Falls, SD

That's the driving distance. It would take 11 hours 54 mins to go from Boulder, Colorado to Sioux Falls, South Dakota.

The flight distance (direct flight from Boulder, CO to Sioux Falls, SD) is 504.25 mi.

642 mi = 1,033.44 kms