Originally Posted by
Mr. Bean
I recently tried booking a JL flight with BA miles for NRT-LAX.
With BA, have to go through LHR and cost 48K miles + $450 (one way). With JL the cost is 25K miles and $120.
This means that BA is collecting the YQ that JL charges for the route ($72).

since that fee is not passed on to JL anyway.
Since JL doesn't fly NRT-LHR-LAX, I can only presume that you were being quoted at least one segment on BA (LHR-LAX), which entails YQ. I'm more interested in the fees associated with booking JL062 (NRT-LAX) with BA miles. From what I've been able to ascertain elsewhere, there is no YQ in this case.