Miles between Longmont, CO and Crystal Lake, IL

There are
985 mi
from Longmont, CO to Crystal Lake, IL

That's the driving distance. It would take 17 hours 45 mins to go from Longmont, Colorado to Crystal Lake, Illinois.

The flight distance (direct flight from Longmont, CO to Crystal Lake, IL) is 882.78 mi.

985 mi = 1,585.43 kms