There’s an international airport on the NW corner of the island in Aguadilla. When I looked into planning a trip in the past I was hoping it would be possible to fly there from Boston with just one stop someplace, but I couldn’t make it work. One of those not enough flights with the right airlines or times things. Has anyone flown into there rather than San Juan?
Out of curiosity I looked up the airport. The Wikipedia entry of all the history is interesting, and talks about very recent plans to expand the airport. (Also about previous plans to expand the airport, unclear if any of it happened.)