There are
1,515 mi
from St Joseph, MO to Barstow, CA
That's the driving distance. It would take 1 day 2 hours to go from St Joseph, Missouri to Barstow, California.
The flight distance (direct flight from St Joseph, MO to Barstow, CA) is 1,260.41 mi.
1,515 mi = 1.61 kms