I have a similar but slightly different question. I am looking to book my daughter on an AA ticket that includes flights operated by both AA and BA. She is BA Silver / oneworld sapphire.

If I book her a basic economy ticket will she still receive her oneworld sapphire baggage allowance. On the AA website it says that the "Restriction doesn’t apply to AAdvantageŽ elite status members". Is that strictly AAdvantage elite status members or does it extend to oneworld members too?

Thanks