Miles between Centennial, CO and Alton, IL

There are
859 mi
from Centennial, CO to Alton, IL

That's the driving distance. It would take 15 hours 7 mins to go from Centennial, Colorado to Alton, Illinois.

The flight distance (direct flight from Centennial, CO to Alton, IL) is 786.87 mi.

859 mi = 1,382.39 kms