There are
717 mi
from Denton, TX to Sioux City, IA
That's the driving distance. It would take 12 hours 48 mins to go from Denton, Texas to Sioux City, Iowa.
The flight distance (direct flight from Denton, TX to Sioux City, IA) is 642.78 mi.
717 mi = 1,153.25 kms