There are
1,796 mi
from Alameda, CA to Watertown, SD
That's the driving distance. It would take 1 day 7 hours to go from Alameda, California to Watertown, South Dakota.
The flight distance (direct flight from Alameda, CA to Watertown, SD) is 1,386.77 mi.
1,796 mi = 1.61 kms