Miles between Longmont, CO and Dekalb, IL

There are
941 mi
from Longmont, CO to Dekalb, IL

That's the driving distance. It would take 16 hours 43 mins to go from Longmont, Colorado to Dekalb, Illinois.

The flight distance (direct flight from Longmont, CO to Dekalb, IL) is 859.34 mi.

941 mi = 1,514.73 kms