Originally Posted by
Geordie405
You can only use a SWU on AA marketed and operated flights, and they have to be purchased via AA or an authorised TA - and hence need to be 001- tickets. You would not be able to book with BA and have a 125- ticket and then apply a SWU to it.
I have booked BA tickets which include AA operated flights booked under the AA prime flight number many times. Usually those flights have been the domestic flights in the US, and the TATLs which connect to/from the AA flights have been BA operated and marketed flights.
I agree outside the JBA for TATL, BA will not sell you AA flights.