There are
1,266 mi
from Marshalltown, IA to Jacksonville Beach, FL
That's the driving distance. It would take 23 hours 47 mins to go from Marshalltown, Iowa to Jacksonville Beach, Florida.
The flight distance (direct flight from Marshalltown, IA to Jacksonville Beach, FL) is 1,033.87 mi.
1,266 mi = 2,038.12 kms