Originally Posted by
gemac
I don't think this is exactly correct. "American Airlines First Class and Business Class passengers traveling on, or connecting to or from an American Airlines international* flight have access to the Admirals Club on the same-day** of their international flight."
I had thought that upgrades didn't count for this (only paid or award F or J). But I could well be wrong in my recollection as I've never accessed a lounge in this way.
Cheers.