There are
1,683 mi
from Walnut Creek, CA to Sioux City, IA
That's the driving distance. It would take 1 day 5 hours to go from Walnut Creek, California to Sioux City, Iowa.
The flight distance (direct flight from Walnut Creek, CA to Sioux City, IA) is 1,385.28 mi.
1,683 mi = 2,708.63 kms