There are
332 mi
from Boynton Beach, FL to St Marys, GA
That's the driving distance. It would take 6 hours 8 mins to go from Boynton Beach, Florida to St Marys, Georgia.
The flight distance (direct flight from Boynton Beach, FL to St Marys, GA) is 306.24 mi.
332 mi = 533.72 kms