There are
1,784 mi
from St Charles, MO to San Bernardino, CA
That's the driving distance. It would take 1 day 6 hours to go from St Charles, Missouri to San Bernardino, California.
The flight distance (direct flight from St Charles, MO to San Bernardino, CA) is 1,517.20 mi.
1,784 mi = 2,870.56 kms