There are
1,575 mi
from Tacoma, WA to Watertown, SD
That's the driving distance. It would take 1 day 2 hours to go from Tacoma, Washington to Watertown, South Dakota.
The flight distance (direct flight from Tacoma, WA to Watertown, SD) is 1,219.38 mi.
1,575 mi = 1.61 kms