There are
878 mi
from Danbury, CT to Algonquin, IL
That's the driving distance. It would take 16 hours 33 mins to go from Danbury, Connecticut to Algonquin, Illinois.
The flight distance (direct flight from Danbury, CT to Algonquin, IL) is 765.50 mi.
878 mi = 1,413.08 kms