Originally Posted by
cr7L
Hi there! I'm wondering if its possible to use different FFN's for different segments on a single itinerary. I've seen people mention that you can have your FFN changed segment by segment at the gate or at check in for accrual purposes, but I would like to know if this is something that can be done beforehand, primarily for seat selection. Example would be MIA - LHR operated by AA and LHR - FCO operated by BA. I'm gold on AA and sapphire on AT, so I want to be able to choose MCE (at 24 hours) on the AA segment, and then choose preferred seats on BA. Thank you!
I'm sure you realize that Oneworld sapphire will let you choose MCE on AA... so I'm guessing that you want the miles credited to AA for MIA-LHR ?
Separately, you can try to do the FFN switcheroo on day of travel but be warned that it's a royal hassle to undo points crediting with BA.
AA also frowns on using their status to get status-related perks, only to then switch to a non-AA status for accrual.