Originally Posted by
oopsz
Yes you can do this. The easiest way is to buy online and enter your AA number, then call in to upgrade using your avios.
Also, IMO, PE->CW upgrades are a phenomenal way to burn avios.
+1
I have a trip that's departing on the 26th and is done exactly in the same way.
Book in WT+ upgraded to CW with avios AAdvantage number registered on ticket
Just book on ba.com put in aa and call BAEC.