There are
1,756 mi
from Sioux Falls, SD to Union City, CA
That's the driving distance. It would take 1 day 6 hours to go from Sioux Falls, South Dakota to Union City, California.
The flight distance (direct flight from Sioux Falls, SD to Union City, CA) is 1,386.20 mi.
1,756 mi = 1.61 kms