Miles between Boulder, CO and Cahokia, IL

There are
873 mi
from Boulder, CO to Cahokia, IL

That's the driving distance. It would take 15 hours 28 mins to go from Boulder, Colorado to Cahokia, Illinois.

The flight distance (direct flight from Boulder, CO to Cahokia, IL) is 811.57 mi.

873 mi = 1,405.69 kms