There are
2,287 mi
from Missoula, MT to Allentown, PA
That's the driving distance. It would take 1 day 16 hours to go from Missoula, Montana to Allentown, Pennsylvania.
The flight distance (direct flight from Missoula, MT to Allentown, PA) is 1,950.68 mi.
2,287 mi = 3.22 kms