There are
1,767 mi
from San Bernardino, CA to Wentzville, MO
That's the driving distance. It would take 1 day 6 hours to go from San Bernardino, California to Wentzville, Missouri.
The flight distance (direct flight from San Bernardino, CA to Wentzville, MO) is 1,499 mi.
1,767 mi = 2,844.48 kms