Miles between Westminster, CO and Alton, IL

There are
856 mi
from Westminster, CO to Alton, IL

That's the driving distance. It would take 15 hours 10 mins to go from Westminster, Colorado to Alton, Illinois.

The flight distance (direct flight from Westminster, CO to Alton, IL) is 795.18 mi.

856 mi = 1,378.24 kms