There are
1,704 mi
from Covina, CA to Watertown, SD
That's the driving distance. It would take 1 day 5 hours to go from Covina, California to Watertown, South Dakota.
The flight distance (direct flight from Covina, CA to Watertown, SD) is 1,329.74 mi.
1,704 mi = 2,741.99 kms