Originally Posted by
deeruck
You also may get the opportunity for cheaper upgrades through BA.com. (There's a thread tracking prices in the BA forum). That's not an option if booked on or through aa.
Originally Posted by
FAA1996
I would do it for the upgrades also. Currently in CW on a flight booked as an AA flight number on he A380, can't really do anything about upgrading until I'm at the lounge and see if they'll let me pay...
For pretty much every conceivable reason-- but the BAEC/ BA-offered upgrade possibility mentioned above being very high on the list-- book the BA flight number if you have any choice, for sure.