There are
1,555 mi
from Missoula, MT to Warrenville, IL
That's the driving distance. It would take 1 day 2 hours to go from Missoula, Montana to Warrenville, Illinois.
The flight distance (direct flight from Missoula, MT to Warrenville, IL) is 1,317.23 mi.
1,555 mi = 1.61 kms