Miles between Sioux City, IA and Boulder, CO

There are
603 mi
from Sioux City, IA to Boulder, CO

That's the driving distance. It would take 10 hours 56 mins to go from Sioux City, Iowa to Boulder, Colorado.

The flight distance (direct flight from Sioux City, IA to Boulder, CO) is 491.41 mi.

603 mi = 970.63 kms