There are
896 mi
from Killeen, TX to Sioux City, IA
That's the driving distance. It would take 15 hours 55 mins to go from Killeen, Texas to Sioux City, Iowa.
The flight distance (direct flight from Killeen, TX to Sioux City, IA) is 789.87 mi.
896 mi = 1,441.24 kms