There are
1,508 mi
from Barstow, CA to Maryville, MO
That's the driving distance. It would take 1 day 2 hours to go from Barstow, California to Maryville, Missouri.
The flight distance (direct flight from Barstow, CA to Maryville, MO) is 1,265.13 mi.
1,508 mi = 2,426.60 kms