Someone who works for an Admirals Club should add their comments as they would be most welcome.

I usually travel overnight GRU-DFW, arriving DFW in the morning and as a few years ago I'd usually get barred out a few AC, specially out of main hubs. LGA having been one of them. Even in those days both AA International and AA DFW would say that I should be allowed in on my itin to the end, regardless of being the next day.

Currently all I see happening is AC Agents typing my Boarding Pass (domestic) into their terminals and all of them waiving me in. I'd say currently it's the system who clears the passenger, and being in an international itinerary, probably the system mght add CLUB to our itineraries - and agents do not make any more mistakes.

I'd say you've great chances - as long as the Agent types your itinerary into the system.

Please do let us know the outcome.