There are
1,944 mi
from Missoula, MT to Chillicothe, OH
That's the driving distance. It would take 1 day 10 hours to go from Missoula, Montana to Chillicothe, Ohio.
The flight distance (direct flight from Missoula, MT to Chillicothe, OH) is 1,637.52 mi.
1,944 mi = 1.61 kms