There are
986 mi
from Macon, GA to Marshalltown, IA
That's the driving distance. It would take 18 hours 42 mins to go from Macon, Georgia to Marshalltown, Iowa.
The flight distance (direct flight from Macon, GA to Marshalltown, IA) is 813.62 mi.
986 mi = 1,587.23 kms