There are
1,400 mi
from Missoula, MT to Roswell, NM
That's the driving distance. It would take 1 day to go from Missoula, Montana to Roswell, New Mexico.
The flight distance (direct flight from Missoula, MT to Roswell, NM) is 1,055.24 mi.
1,400 mi = 1.61 kms