There are
1,684 mi
from Hayward, CA to Yankton, SD
That's the driving distance. It would take 1 day 5 hours to go from Hayward, California to Yankton, South Dakota.
The flight distance (direct flight from Hayward, CA to Yankton, SD) is 1,344.57 mi.
1,684 mi = 1.61 kms