Originally Posted by
LondonAndy
I've done that in the past - AA metal with an AA flight number on a BA itinerary is fine, you can select the seat on the AA website using their PNR as you've said. The problem in this case is that it is AA metal with a BA flight number, and neither the AA website nor the BA website allow you to select seats.....
I had at least two AA metal with BA code (BA ticket) this summer and I was able to select seats on AA.com, using BA PNR.
Unless they screwed up something after that (of course very possible), you should be able to do the same.