There are
1,885 mi
from Missoula, MT to Westerville, OH
That's the driving distance. It would take 1 day 9 hours to go from Missoula, Montana to Westerville, Ohio.
The flight distance (direct flight from Missoula, MT to Westerville, OH) is 1,614.39 mi.
1,885 mi = 1.61 kms