There are
1,867 mi
from Dayton, OH to Missoula, MT
That's the driving distance. It would take 1 day 8 hours to go from Dayton, Ohio to Missoula, Montana.
The flight distance (direct flight from Dayton, OH to Missoula, MT) is 1,566.86 mi.
1,867 mi = 1.61 kms