It's been a few years since I've travelled internationally, and I've never returned to the US via JFK. In a few weeks, we'll fly CDG-JFK-SAN with the JFK-SAN leg on Alaska. I'm OWE. I assume I would have the ability to access T8 Flagship lounge after clearing customs. Or am I hampered by the fact my onward flight on Alaska is out T7, preventing me from accessing secure area of T8?