Miles between Decatur, IL and Alton, IL

There are
108 mi
from Decatur, IL to Alton, IL

That's the driving distance. It would take 2 hours 24 mins to go from Decatur, Illinois to Alton, Illinois.

The flight distance (direct flight from Decatur, IL to Alton, IL) is 92.84 mi.

108 mi = 173.00 kms