There are
1,706 mi
from Beaumont, CA to Watertown, SD
That's the driving distance. It would take 1 day 5 hours to go from Beaumont, California to Watertown, South Dakota.
The flight distance (direct flight from Beaumont, CA to Watertown, SD) is 1,297.53 mi.
1,706 mi = 2,746.07 kms