There are
1,098 mi
from Missoula, MT to Barstow, CA
That's the driving distance. It would take 18 hours 15 mins to go from Missoula, Montana to Barstow, California.
The flight distance (direct flight from Missoula, MT to Barstow, CA) is 841.20 mi.
1,098 mi = 1.61 kms