re: "oneworld" award (140K/280K/420K) Planning - The Definitive Thread
The short answer is no.
If it's a Y award, you can't upgrade a single sector or the whole trip to J or even PE. If it's an J award, you can't even upgrade a US domestic sector on AA or US to their domestic F. It'll have to be a 3 class intercon AA service on A321 with a 3 class configuration. Otherwise Qantas will book you into Y. I personally think it's a rip-off ...
You can, however, downgrade a sector(s) from J to Y if no J available. Which I also think is a rip-off...but that's what it is