There are
1,294 mi
from St Charles, MO to Layton, UT
That's the driving distance. It would take 22 hours 33 mins to go from St Charles, Missouri to Layton, Utah.
The flight distance (direct flight from St Charles, MO to Layton, UT) is 1,144.88 mi.
1,294 mi = 2,081.71 kms