There are
1,131 mi
from Danbury, CT to Marshalltown, IA
That's the driving distance. It would take 21 hours 3 mins to go from Danbury, Connecticut to Marshalltown, Iowa.
The flight distance (direct flight from Danbury, CT to Marshalltown, IA) is 1,002.10 mi.
1,131 mi = 1.61 kms