There are
1,628 mi
from St George, UT to Des Plaines, IL
That's the driving distance. It would take 1 day 4 hours to go from St George, Utah to Des Plaines, Illinois.
The flight distance (direct flight from St George, UT to Des Plaines, IL) is 1,404.68 mi.
1,628 mi = 1.61 kms