There are
1,741 mi
from St Charles, MO to Calexico, CA
That's the driving distance. It would take 1 day 6 hours to go from St Charles, Missouri to Calexico, California.
The flight distance (direct flight from St Charles, MO to Calexico, CA) is 1,458.33 mi.
1,741 mi = 2,801.62 kms