There are
1,778 mi
from Sioux City, IA to Gilroy, CA
That's the driving distance. It would take 1 day 6 hours to go from Sioux City, Iowa to Gilroy, California.
The flight distance (direct flight from Sioux City, IA to Gilroy, CA) is 1,383.95 mi.
1,778 mi = 1.61 kms