There are
1,557 mi
from Wheaton, IL to Missoula, MT
That's the driving distance. It would take 1 day 3 hours to go from Wheaton, Illinois to Missoula, Montana.
The flight distance (direct flight from Wheaton, IL to Missoula, MT) is 1,318.99 mi.
1,557 mi = 2,506.00 kms