There are
1,128 mi
from Norwalk, CT to Marshalltown, IA
That's the driving distance. It would take 21 hours 8 mins to go from Norwalk, Connecticut to Marshalltown, Iowa.
The flight distance (direct flight from Norwalk, CT to Marshalltown, IA) is 1,007.65 mi.
1,128 mi = 1.61 kms