Miles between Boulder, CO and Sioux City, IA

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

That's the driving distance. It would take 10 hours 55 mins to go from Boulder, Colorado to Sioux City, Iowa.

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

604 mi = 971.45 kms