There are
1,351 mi
from Sioux City, IA to Danbury, CT
That's the driving distance. It would take 1 day to go from Sioux City, Iowa to Danbury, Connecticut.
The flight distance (direct flight from Sioux City, IA to Danbury, CT) is 1,178.05 mi.
1,351 mi = 1.61 kms