There are
1,781 mi
from Oxnard, CA to Watertown, SD
That's the driving distance. It would take 1 day 7 hours to go from Oxnard, California to Watertown, South Dakota.
The flight distance (direct flight from Oxnard, CA to Watertown, SD) is 1,381.69 mi.
1,781 mi = 1.61 kms