There are
1,617 mi
from Missoula, MT to Gainesville, TX
That's the driving distance. It would take 1 day 4 hours to go from Missoula, Montana to Gainesville, Texas.
The flight distance (direct flight from Missoula, MT to Gainesville, TX) is 1,271.13 mi.
1,617 mi = 1.61 kms