Use AA trip credit for AA flight to book BA flights
Hi. I need to cancel a Biz AA flight LHR-PHX of my sister (in her AA acct that I can access) that I booked for her with My credit card.
I assume the cost will come as Trip Credit to her AA acct.
She is 90 years old, just had change in health and can NOT fly any more.
I know that it is possible to use someone else trip credit when calling AA - after putting the trip on hold.
The question is:
Can this trip credit be used for someone else for a BA flight starting at LHR and Not to the US ?