There are
1,648 mi
from Lewisville, TX to Missoula, MT
That's the driving distance. It would take 1 day 4 hours to go from Lewisville, Texas to Missoula, Montana.
The flight distance (direct flight from Lewisville, TX to Missoula, MT) is 1,307.46 mi.
1,648 mi = 1.61 kms