There are
1,783 mi
from San Bernardino, CA to St Charles, MO
That's the driving distance. It would take 1 day 6 hours to go from San Bernardino, California to St Charles, Missouri.
The flight distance (direct flight from San Bernardino, CA to St Charles, MO) is 1,517.20 mi.
1,783 mi = 2,868.89 kms