Hi Flyers,

1st post here and I am turning to you guys for a bit of help. I am OW Sapphire with BA, been that for years and pretty much my flight habits keep me there, always falling a little short from OW Emerald.
My question is simply, is there a massive difference in accumulating equivalent tier with AY. The BA system is quite clear and the tier point accumulation is quite smooth with even getting some nice 80 tierpoint european business class flights to rack up quickly.

Now I travel quite a bit between LHR-HEL but I am based in London and fly often on BA flights to other destinations. Will I earn less tier points if I fly BA - X and put my AY number in vs having my BA number in? Does it make a big difference tier point wise whos actual metal it is that im flying?

All help is much appreciated. Reason Im considering AY is just that ive had some really good experiences with them lately and being a Finn would like to support them with my flights, but im just wondering if there is a difference and will I have a harder time racking tier points for AY flying BA out of LHR to other destinations than HKI.

Thanks