There are
1,755 mi
from Union City, CA to Sioux Falls, SD
That's the driving distance. It would take 1 day 6 hours to go from Union City, California to Sioux Falls, South Dakota.
The flight distance (direct flight from Union City, CA to Sioux Falls, SD) is 1,386.20 mi.
1,755 mi = 1.61 kms