There are
725 mi
from Flower Mound, TX to Yankton, SD
That's the driving distance. It would take 13 hours 9 mins to go from Flower Mound, Texas to Yankton, South Dakota.
The flight distance (direct flight from Flower Mound, TX to Yankton, SD) is 681.21 mi.
725 mi = 1,166.34 kms