There are
1,797 mi
from Longview, TX to Missoula, MT
That's the driving distance. It would take 1 day 7 hours to go from Longview, Texas to Missoula, Montana.
The flight distance (direct flight from Longview, TX to Missoula, MT) is 1,419.30 mi.
1,797 mi = 1.61 kms