There are
725 mi
from Chattanooga, TN to Boynton Beach, FL
That's the driving distance. It would take 13 hours 14 mins to go from Chattanooga, Tennessee to Boynton Beach, Florida.
The flight distance (direct flight from Chattanooga, TN to Boynton Beach, FL) is 665.61 mi.
725 mi = 1,167.53 kms