Join Date: Mar 2012
Programs: UA 1K, BA GGL/CCR, TK Elite Plus, Marriott Gold4Lyfe, HH Diamond, Avis PC, Hertz PC, Tesco Blue
Posts: 270
Funny that my first thought was, I wouldn't want to have to suffer BA metal transatlantic (or anywhere there's competition, really) to retain GGL going forward!
In the UK-to-US market, BA and AA do full revenue and cost sharing so it's irrelevant to either carrier whose metal you fly. (At least they have immunity to do this, so I am fairly certain they do. Therefore their only incentive in this market is to keep their costs as low/even with the AA as possible.) Not so on many/most of their other routes, so I can see it mattering to BA overall.