There are
716 mi
from Denton, TX to South Sioux City, NE
That's the driving distance. It would take 12 hours 48 mins to go from Denton, Texas to South Sioux City, Nebraska.
The flight distance (direct flight from Denton, TX to South Sioux City, NE) is 640.40 mi.
716 mi = 1,152.08 kms