There are
1,730 mi
from Temecula, CA to Watertown, SD
That's the driving distance. It would take 1 day 6 hours to go from Temecula, California to Watertown, South Dakota.
The flight distance (direct flight from Temecula, CA to Watertown, SD) is 1,324.98 mi.
1,730 mi = 1.61 kms