There are
1,710 mi
from Barstow, CA to Maryland Heights, MO
That's the driving distance. It would take 1 day 5 hours to go from Barstow, California to Maryland Heights, Missouri.
The flight distance (direct flight from Barstow, CA to Maryland Heights, MO) is 1,488.87 mi.
1,710 mi = 2,751.75 kms