Originally Posted by
Vengabus
Using the oneworld alliance option that allows you to transfer avios between participating airlines, so BA Executive Club to AAAdvantage, or vice versa. Or if I am using the wrong term 'transfer', then use the BA avios to book reward flights with AA which is possible
I'm not aware of any mechanism to
transfer Avios to AAdvantage. However, yes, you can book AA flights with Avios but will need to go through BA for that, not AA. I suggest posting this question (or asking the mods to move this thread) to the BA forum.