There are
2,133 mi
from Missoula, MT to Petal, MS
That's the driving distance. It would take 1 day 13 hours to go from Missoula, Montana to Petal, Mississippi.
The flight distance (direct flight from Missoula, MT to Petal, MS) is 1,693.55 mi.
2,133 mi = 3.22 kms