There are
1,958 mi
from Santa Maria, CA to Cahokia, IL
That's the driving distance. It would take 1 day 10 hours to go from Santa Maria, California to Cahokia, Illinois.
The flight distance (direct flight from Santa Maria, CA to Cahokia, IL) is 1,685.01 mi.
1,958 mi = 3,151.39 kms