There are
1,738 mi
from Gardena, CA to Watertown, SD
That's the driving distance. It would take 1 day 6 hours to go from Gardena, California to Watertown, South Dakota.
The flight distance (direct flight from Gardena, CA to Watertown, SD) is 1,357.05 mi.
1,738 mi = 2,797.66 kms