Miles between Sioux Falls, SD and Boulder, CO

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

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

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

643 mi = 1,035.08 kms