Originally Posted by
docr775
If you are considering FB, why don't you make your reservations on CO using your CO FF#. That way you are still elligible to get your EUAs, at least on the outbound domestic flights. The day of departure, log on to CO.com, go into your reservation and change your FF # from CO to AF. That you you cash in on Elite Access and EUAs, but still get credit on AF. I did it last year after getting re-qualified as PLAT. I had all my subsequent flights credited to FB to get FB status. You do not get EUAs on AF on transatlantic flights, but you do get bumped up front quite a bit on European flights and you get more luggage allowance as an elite.

But if you change your frequent flyer number to a non-CO or NW elite number after you have been EUA'd, you lose your EUA, no?