There are
781 mi
from Boynton Beach, FL to Slidell, LA
That's the driving distance. It would take 14 hours 8 mins to go from Boynton Beach, Florida to Slidell, Louisiana.
The flight distance (direct flight from Boynton Beach, FL to Slidell, LA) is 644.46 mi.
781 mi = 1,257.22 kms