There are
2,093 mi
from Missoula, MT to Brownsville, TX
That's the driving distance. It would take 1 day 12 hours to go from Missoula, Montana to Brownsville, Texas.
The flight distance (direct flight from Missoula, MT to Brownsville, TX) is 1,707.25 mi.
2,093 mi = 3.22 kms