There are
1,638 mi
from Missoula, MT to Rantoul, IL
That's the driving distance. It would take 1 day 4 hours to go from Missoula, Montana to Rantoul, Illinois.
The flight distance (direct flight from Missoula, MT to Rantoul, IL) is 1,363.87 mi.
1,638 mi = 1.61 kms