There are
1,216 mi
from St George, UT to Sioux City, IA
That's the driving distance. It would take 21 hours 20 mins to go from St George, Utah to Sioux City, Iowa.
The flight distance (direct flight from St George, UT to Sioux City, IA) is 983.11 mi.
1,216 mi = 1.61 kms