There are
795 mi
from Boynton Beach, FL to Johnson City, TN
That's the driving distance. It would take 14 hours 40 mins to go from Boynton Beach, Florida to Johnson City, Tennessee.
The flight distance (direct flight from Boynton Beach, FL to Johnson City, TN) is 689.54 mi.
795 mi = 1,280.04 kms