There are
1,522 mi
from Missoula, MT to Antioch, IL
That's the driving distance. It would take 1 day 2 hours to go from Missoula, Montana to Antioch, Illinois.
The flight distance (direct flight from Missoula, MT to Antioch, IL) is 1,302.91 mi.
1,522 mi = 1.61 kms