There are
1,604 mi
from Westminster, CA to South Sioux City, NE
That's the driving distance. It would take 1 day 4 hours to go from Westminster, California to South Sioux City, Nebraska.
The flight distance (direct flight from Westminster, CA to South Sioux City, NE) is 1,313.55 mi.
1,604 mi = 1.61 kms