Originally Posted by
BusinessElite25
Flying RST-ORD-TXL as AB Gold/OW Sapphire. Can I just use the AA flagship club in T3 before switching to T5 for my AB flight?
Not by oneworld rules (Need First or Emerald for that).
However, AA have their own rules and the answer is yes:
https://www.aa.com/i18n/travel-info/...hip-lounge.jsp (Select Qualifying First and Business Class.)
Get access if you’re traveling in First or Business on a qualifying international or transcontinental flight marketed and operated by American or a oneworld® airline. ...