Originally Posted by
btonkid12345
This. Don't even show BOS-XXX as that will immediately trigger "domestic flights don't get access in F."
You need to show both tickets, since you do not get lounge access if you don't have a connecting flight. I did this four times last year at SEA, LAX, HNL and SLC. You hand them both boarding passes, you don't need to say anything or explain anything. I just say good morning/afternoon and hand them both tickets. Once, an agent two years ago asked me "separate tickets?" I said "yes." She did some typing and I was in. Skyclub agents are competent. OP or anyone else will have zero issue and there is no need to worry about them making up rules.