From Juan Santamaría International Airport in Alajuela (SJO), fly SANSA Airlines to Golfito. SANSA offers daily flights from San Jose (SJO) to Golfito. This flight is approximately 45 minutes. From Golfito, taxi to Pavones. Contact here for a taxi service. The taxi ride takes one hour and 40 minutes to reach Pavones. This is the quickest way to travel from SJO to Pavones.
Keep in mind, these are the surfboard requirements on Sansa;
TRACOPA Bus Direct
Take public transportation from SJO to Golfito. Bus leaves SJO at 7;00 and 15;00. Switch buses in Golfito to Pavones. Leaves Golfito at 10;00 and 15;00 and arrives in Pavones at 5;00 and 12;30. The full bus schedule can be found here.
To leave Pavones you can do any of these steps in reverse. I hope this helped and safe travels.