Originally Posted by christep
You can tell this was set up by AA - why not do LHR-SFO on BA instead of LHR-xLAX-SFO?
Perhaps
20schwarz wants to credit the flights to an AAdvantage account. That rules out BA from LHR-SFO.
Or maybe s/he wants to use an eVIP or upgrade with AAdvantage miles from LHR to LAX.