There are
1,257 mi
from Missoula, MT to Poway, CA
That's the driving distance. It would take 21 hours 12 mins to go from Missoula, Montana to Poway, California.
The flight distance (direct flight from Missoula, MT to Poway, CA) is 973.25 mi.
1,257 mi = 1.61 kms