There are
896 mi
from Roswell, GA to Marshalltown, IA
That's the driving distance. It would take 17 hours 5 mins to go from Roswell, Georgia to Marshalltown, Iowa.
The flight distance (direct flight from Roswell, GA to Marshalltown, IA) is 722.97 mi.
896 mi = 1,441.84 kms