Miles between Longmont, CO and River Forest, IL

There are
994 mi
from Longmont, CO to River Forest, IL

That's the driving distance. It would take 17 hours 46 mins to go from Longmont, Colorado to River Forest, Illinois.

The flight distance (direct flight from Longmont, CO to River Forest, IL) is 907.37 mi.

994 mi = 1,599.31 kms