There are
1,009 mi
from Missoula, MT to Half Moon Bay, CA
That's the driving distance. It would take 19 hours 43 mins to go from Missoula, Montana to Half Moon Bay, California.
The flight distance (direct flight from Missoula, MT to Half Moon Bay, CA) is 778.09 mi.
1,009 mi = 1.61 kms