There are
1,042 mi
from Missoula, MT to Flagstaff, AZ
That's the driving distance. It would take 18 hours 17 mins to go from Missoula, Montana to Flagstaff, Arizona.
The flight distance (direct flight from Missoula, MT to Flagstaff, AZ) is 814.96 mi.
1,042 mi = 1.61 kms