There are
998 mi
from Sioux City, IA to Orem, UT
That's the driving distance. It would take 17 hours 26 mins to go from Sioux City, Iowa to Orem, Utah.
The flight distance (direct flight from Sioux City, IA to Orem, UT) is 806.02 mi.
998 mi = 1,606.89 kms