There are
2,074 mi
from Missoula, MT to San Benito, TX
That's the driving distance. It would take 1 day 11 hours to go from Missoula, Montana to San Benito, Texas.
The flight distance (direct flight from Missoula, MT to San Benito, TX) is 1,689.27 mi.
2,074 mi = 3.22 kms