There are
1,298 mi
from Boynton Beach, FL to San Marcos, TX
That's the driving distance. It would take 23 hours 37 mins to go from Boynton Beach, Florida to San Marcos, Texas.
The flight distance (direct flight from Boynton Beach, FL to San Marcos, TX) is 1,111.60 mi.
1,298 mi = 1.61 kms