There are
1,512 mi
from Boynton Beach, FL to Marshalltown, IA
That's the driving distance. It would take 1 day 4 hours to go from Boynton Beach, Florida to Marshalltown, Iowa.
The flight distance (direct flight from Boynton Beach, FL to Marshalltown, IA) is 1,295.88 mi.
1,512 mi = 1.61 kms