Boston MA: Direct flights ~$280 from BOS to SJU, then 2 hours to Rincon
Newark NJ: Direct flights ~$360 from EWR to BQN (Aguadilla), then 30 min to Rincon
Transportation
Rental car ~$50/day (recommended)
Uber from Aguadilla to Rincon ~$40
Uber from SJU to Rincon ~$200