Originally Posted by
JAXBA
If/when they rebook to process the upgrade, you’d be rebooked on the AA flight number from the BA code.
Yes, the used to rebook onto AA prime flight numbers when upgrading BA*AA codeshares was allowed. BAEC changed the rules a few years ago requiring that AA and IB flights to be booked as prime flight numbers to begin with.
Originally Posted by
oceanscape
I was told in no uncertain terms that it made no difference it was booked through Amex corporate travel and they can still process the upgrade at BA, but maybe the travel agent part will be the issue with rebooking it on to the AA flight number.
It looks like the agents you spoke to did not realize that you were inquiring about a join business upgrade. It is possible to upgrade BA flights even if you purchased the ticket from a travel agent. But you're not upgrading a BA flight. What you want should not, and probably would not, happen. I don't know why you're getting a different answer from the call centre agents.