There are
1,868 mi
from St Charles, MO to Mcfarland, CA
That's the driving distance. It would take 1 day 8 hours to go from St Charles, Missouri to Mcfarland, California.
The flight distance (direct flight from St Charles, MO to Mcfarland, CA) is 1,587.69 mi.
1,868 mi = 3,006.65 kms