There are
820 mi
from Boynton Beach, FL to Shelbyville, TN
That's the driving distance. It would take 15 hours 8 mins to go from Boynton Beach, Florida to Shelbyville, Tennessee.
The flight distance (direct flight from Boynton Beach, FL to Shelbyville, TN) is 725.14 mi.
820 mi = 1,319.64 kms