Originally Posted by
Frequent flyer 101
That's right in theory, but wrong in practice. OSL-LHR-LAX (Y + W as per cash purchase). If you UuA the LHR-LAX flight from W to J, BA more of than not will not be able to do the calculation properly. I suspect because it may be calculating 3 classes during the journey or maybe it's just bad programming. But I've had it where it will price the taxes for the LHR-LAX J flight including full UK APD, even with a 2 hour connection. I didn't argue the point as I actually got the J tier points in the end (also a common glitch apparently).
Is that via online or the call center? The online tool does do crazy things sometimes, but I've upgraded these at least 5 or 6 times via the call center without issue (although, as always, YMMV).
The J tier points is always a nice surprise when it does happen, which,unfortunately, isn't as frequently as I would like it to be.