There are
1,639 mi
from Missoula, MT to Champaign, IL
That's the driving distance. It would take 1 day 4 hours to go from Missoula, Montana to Champaign, Illinois.
The flight distance (direct flight from Missoula, MT to Champaign, IL) is 1,366.08 mi.
1,639 mi = 1.61 kms