There are
1,815 mi
from Sioux Falls, SD to Watsonville, CA
That's the driving distance. It would take 1 day 7 hours to go from Sioux Falls, South Dakota to Watsonville, California.
The flight distance (direct flight from Sioux Falls, SD to Watsonville, CA) is 1,392.69 mi.
1,815 mi = 1.61 kms