There are
717 mi
from Sioux City, IA to Denton, TX
That's the driving distance. It would take 12 hours 47 mins to go from Sioux City, Iowa to Denton, Texas.
The flight distance (direct flight from Sioux City, IA to Denton, TX) is 642.78 mi.
717 mi = 1,154.11 kms