Miles between Longmont, CO and Rock Island, IL

There are
836 mi
from Longmont, CO to Rock Island, IL

That's the driving distance. It would take 14 hours 53 mins to go from Longmont, Colorado to Rock Island, Illinois.

The flight distance (direct flight from Longmont, CO to Rock Island, IL) is 763.89 mi.

836 mi = 1,344.70 kms