There are
1,508 mi
from Tempe, AZ to Watertown, SD
That's the driving distance. It would take 1 day 3 hours to go from Tempe, Arizona to Watertown, South Dakota.
The flight distance (direct flight from Tempe, AZ to Watertown, SD) is 1,118.71 mi.
1,508 mi = 1.61 kms