Originally Posted by
ernestnywang
I believe [MENTION=794258]Leaping_Deere[/MENTION] was talking about nesting another ticket within the RTW and wanted to keep everything in one PNR. If the other ticket is on AA flights, BA would not be able to issue it on its plate in a BA-created PNR unless one is using the oneworld Visit North America fare.
BA can and do issue fully AA itineraries on 125 stock. (I have plenty of personal experience.)
It’s in line with the
policy on the usage of 125 stock, which, separately from tickets containing BA flights, also allows it to be used on itineraries containing only AA, AY, EI, IB, JL, and/or VY flights.
Most (but not all) AA fares can be issued by BA. The "instant upgrade" domestic fares usually must be issued on 001 AA stock.
However, many BA staff do not know this or do not want to do it.