Originally Posted by Gardyloo
LHR-SFO is operated by BA, toxic to the OP's quest for AA EXP.
OTOH Tom could go LHR-LAX-SJU-DFW-ANC-DFW-JFK in the US instead,
Good point. And I forgot about SJU since I tend to avoid it on AONE3s because it is Y/J, not Y/F which means less status miles on CX Marco Polo, but is OK on DONEx and AAdvantage.