There are
1,724 mi
from Walnut Creek, CA to Sioux Falls, SD
That's the driving distance. It would take 1 day 5 hours to go from Walnut Creek, California to Sioux Falls, South Dakota.
The flight distance (direct flight from Walnut Creek, CA to Sioux Falls, SD) is 1,378.01 mi.
1,724 mi = 2,774.15 kms