FlyerTalk Forums - View Single Post - BA Gold Flying SEA - SFO, AA Ticket, AS Metal - Baggage Allowance
Old Sep 30, 2017 | 4:17 am
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Prospero
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In theory, as this is a US domestic flight, AA allowances prevail as AA is the marketed airline (per US DOT guidelines).

I'll leave the practical matter of oneworld Emerald allowances to those with direct experience.
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