Miles between Longmont, CO and Lemont, IL

There are
991 mi
from Longmont, CO to Lemont, IL

That's the driving distance. It would take 17 hours 40 mins to go from Longmont, Colorado to Lemont, Illinois.

The flight distance (direct flight from Longmont, CO to Lemont, IL) is 897.32 mi.

991 mi = 1,594.74 kms