Miles between Boulder, CO and Granite City, IL

There are
871 mi
from Boulder, CO to Granite City, IL

That's the driving distance. It would take 15 hours 27 mins to go from Boulder, Colorado to Granite City, Illinois.

The flight distance (direct flight from Boulder, CO to Granite City, IL) is 811.96 mi.

871 mi = 1,402.52 kms