There are
1,883 mi
from St Charles, MO to Oxnard, CA
That's the driving distance. It would take 1 day 8 hours to go from St Charles, Missouri to Oxnard, California.
The flight distance (direct flight from St Charles, MO to Oxnard, CA) is 1,616.57 mi.
1,883 mi = 3,030.37 kms