There are
1,707 mi
from Kalispell, MT to Chatham, IL
That's the driving distance. It would take 1 day 6 hours to go from Kalispell, Montana to Chatham, Illinois.
The flight distance (direct flight from Kalispell, MT to Chatham, IL) is 1,350.75 mi.
1,707 mi = 2,747.79 kms