There are
820 mi
from Sioux Falls, SD to Flower Mound, TX
That's the driving distance. It would take 14 hours 38 mins to go from Sioux Falls, South Dakota to Flower Mound, Texas.
The flight distance (direct flight from Sioux Falls, SD to Flower Mound, TX) is 728.24 mi.
820 mi = 1,319.19 kms