Originally Posted by
tjcxx
Sorry I got this quite badly wrong with the AA calculation. My calculator was still using the pandemic reduced thresholds. The breakeven fare is actually over £700.
Just for completeness, crediting BA-coded flights to AA advantage would need over 20 trips to NYC, or over 16 trips to LAX. (at whatever price you find). The AA-coded flights calculation of £700 as above is destination mileage-independent.
Now if you are paying £700 and are credting to BAEC, then you'll probably be in a fare class that gives 35TPs per sector, meaning it will take only 9 trips. Sorry it's so complicated....
I can't really now see any reason why you would not credit to BA, based on aiming to keep status for the following year.
Of course, any Loyalty Points earned through other methods -- such as hotel stays or car rentals -- would reduce the number of Loyalty Points needed through flying. And if the OP's AAdvantage Platinum status extends through 2023, a 60% bonus on base mileage earned on BA-coded flights, or pre-tax fares paid on AA-coded flights, would be earned.
Economy Class fare bases when flying BA-coded flights will affect the number of Loyalty Points earned when credited to AAdvantage.