Miles between Longmont, CO and St Charles, IL

There are
965 mi
from Longmont, CO to St Charles, IL

That's the driving distance. It would take 17 hours 18 mins to go from Longmont, Colorado to St Charles, Illinois.

The flight distance (direct flight from Longmont, CO to St Charles, IL) is 881.86 mi.

965 mi = 1,553.56 kms