There are
1,816 mi
from Fremont, CA to Watertown, SD
That's the driving distance. It would take 1 day 7 hours to go from Fremont, California to Watertown, South Dakota.
The flight distance (direct flight from Fremont, CA to Watertown, SD) is 1,381.97 mi.
1,816 mi = 1.61 kms