There are
1,581 mi
from Reno, NV to Watertown, SD
That's the driving distance. It would take 1 day 3 hours to go from Reno, Nevada to Watertown, South Dakota.
The flight distance (direct flight from Reno, NV to Watertown, SD) is 1,214.68 mi.
1,581 mi = 1.61 kms