There are
1,515 mi
from Barstow, CA to St Joseph, MO
That's the driving distance. It would take 1 day 2 hours to go from Barstow, California to St Joseph, Missouri.
The flight distance (direct flight from Barstow, CA to St Joseph, MO) is 1,260.41 mi.
1,515 mi = 2,437.76 kms