There are
1,738 mi
from Ukiah, CA to South Sioux City, NE
That's the driving distance. It would take 1 day 6 hours to go from Ukiah, California to South Sioux City, Nebraska.
The flight distance (direct flight from Ukiah, CA to South Sioux City, NE) is 1,413.88 mi.
1,738 mi = 2,796.44 kms