There are
1,851 mi
from La Mesa, CA to Collinsville, IL
That's the driving distance. It would take 1 day 8 hours to go from La Mesa, California to Collinsville, Illinois.
The flight distance (direct flight from La Mesa, CA to Collinsville, IL) is 1,564.26 mi.
1,851 mi = 2,979.05 kms