There are
733 mi
from Flower Mound, TX to South Sioux City, NE
That's the driving distance. It would take 13 hours 15 mins to go from Flower Mound, Texas to South Sioux City, Nebraska.
The flight distance (direct flight from Flower Mound, TX to South Sioux City, NE) is 654.09 mi.
733 mi = 1,178.84 kms