There are
1,540 mi
from Yankton, SD to Beaumont, CA
That's the driving distance. It would take 1 day 3 hours to go from Yankton, South Dakota to Beaumont, California.
The flight distance (direct flight from Yankton, SD to Beaumont, CA) is 1,222.65 mi.
1,540 mi = 2,477.69 kms