There are
1,056 mi
from Missoula, MT to Watsonville, CA
That's the driving distance. It would take 20 hours 33 mins to go from Missoula, Montana to Watsonville, California.
The flight distance (direct flight from Missoula, MT to Watsonville, CA) is 793.46 mi.
1,056 mi = 1.61 kms