There are
2,051 mi
from Modesto, CA to Cahokia, IL
That's the driving distance. It would take 1 day 11 hours to go from Modesto, California to Cahokia, Illinois.
The flight distance (direct flight from Modesto, CA to Cahokia, IL) is 1,668.29 mi.
2,051 mi = 3.22 kms