There are
1,618 mi
from Simi Valley, CA to South Sioux City, NE
That's the driving distance. It would take 1 day 4 hours to go from Simi Valley, California to South Sioux City, Nebraska.
The flight distance (direct flight from Simi Valley, CA to South Sioux City, NE) is 1,332.16 mi.
1,618 mi = 1.61 kms