There are
1,216 mi
from Sioux City, IA to St George, UT
That's the driving distance. It would take 21 hours 18 mins to go from Sioux City, Iowa to St George, Utah.
The flight distance (direct flight from Sioux City, IA to St George, UT) is 983.11 mi.
1,216 mi = 1.61 kms