There are
1,786 mi
from Pittsburg, CA to Watertown, SD
That's the driving distance. It would take 1 day 6 hours to go from Pittsburg, California to Watertown, South Dakota.
The flight distance (direct flight from Pittsburg, CA to Watertown, SD) is 1,361 mi.
1,786 mi = 2,873.94 kms