Thank you for bringing this to my attention. I hadn’t even thought about the terminal connection situation.

however, I believe I should be able to go through customs after landing, re-enter the south terminal security and use the lounge (though this is not my departure terminal, from what I’ve read you can enter a different terminal for lounge use). I would have to pass through security again at the central terminal to board my JetBlue flight. I realize this is a lot of hassle for lounge use but our layover is 3.5 hours so it would be worthwhile.

My only concern is that they will not allow me to enter at the LATAM lounge as my boarding pass shows a JetBlue flight, even if I purchased through LATAM.