There are
818 mi
from Danbury, CT to Calumet City, IL
That's the driving distance. It would take 15 hours 6 mins to go from Danbury, Connecticut to Calumet City, Illinois.
The flight distance (direct flight from Danbury, CT to Calumet City, IL) is 727.67 mi.
818 mi = 1,315.96 kms