There are
1,323 mi
from Layton, UT to Cahokia, IL
That's the driving distance. It would take 23 hours 1 min to go from Layton, Utah to Cahokia, Illinois.
The flight distance (direct flight from Layton, UT to Cahokia, IL) is 1,165.54 mi.
1,323 mi = 2,129.19 kms