There are
1,236 mi
from St George, UT to Maryville, MO
That's the driving distance. It would take 21 hours 28 mins to go from St George, Utah to Maryville, Missouri.
The flight distance (direct flight from St George, UT to Maryville, MO) is 1,030.96 mi.
1,236 mi = 1.61 kms