There are
1,202 mi
from Missoula, MT to Placentia, CA
That's the driving distance. It would take 20 hours 10 mins to go from Missoula, Montana to Placentia, California.
The flight distance (direct flight from Missoula, MT to Placentia, CA) is 919.70 mi.
1,202 mi = 1.61 kms