There are
1,582 mi
from Sioux City, IA to Walnut, CA
That's the driving distance. It would take 1 day 3 hours to go from Sioux City, Iowa to Walnut, California.
The flight distance (direct flight from Sioux City, IA to Walnut, CA) is 1,298.51 mi.
1,582 mi = 1.61 kms