There are
1,638 mi
from Champaign, IL to Missoula, MT
That's the driving distance. It would take 1 day 4 hours to go from Champaign, Illinois to Missoula, Montana.
The flight distance (direct flight from Champaign, IL to Missoula, MT) is 1,366.08 mi.
1,638 mi = 1.61 kms