There are
993 mi
from Janesville, WI to Middletown, CT
That's the driving distance. It would take 18 hours 44 mins to go from Janesville, Wisconsin to Middletown, Connecticut.
The flight distance (direct flight from Janesville, WI to Middletown, CT) is 841.05 mi.
993 mi = 1,597.72 kms