Miles between Longmont, CO and Granite City, IL

There are
879 mi
from Longmont, CO to Granite City, IL

That's the driving distance. It would take 15 hours 31 mins to go from Longmont, Colorado to Granite City, Illinois.

The flight distance (direct flight from Longmont, CO to Granite City, IL) is 803.40 mi.

879 mi = 1,415.08 kms