Originally Posted by e_e_ling
I may go for AA as I will be flying with them, but how carefully should I think about this? Is it possible to join a program with a different oneworld airline in future if I find myself flying a lot with a different airline?
Just bear in mind though that you cannot accrue miles to disAAdvantage when flying from London to the Untied States on BA, so joining disAAdvantage will limit your airline options a bit. Might be worth checking out the other programs, QF, EI, IB and so on.
Dave