There are
1,205 mi
from Missoula, MT to San Jacinto, CA
That's the driving distance. It would take 20 hours 14 mins to go from Missoula, Montana to San Jacinto, California.
The flight distance (direct flight from Missoula, MT to San Jacinto, CA) is 916.49 mi.
1,205 mi = 1.61 kms