Originally Posted by
Apieinthesky
That is essentially what's going on. The website shows SWU available if Y>J (C) OR J>F (A) upgrades are available. Since 772 flights almost always have A inventory available, this is not terribly useful if you are upgrading Y>J.
Excellent summary. This is not useful at all for me since I almost never purchase international J. I wish the SWU availability could be deliniated when you expand on a flight option via the + symbol. I'm sure they could add a fifth field where they have the meal, advance purchase, booking code and cabin identified.