Originally Posted by QRC3288

You can upgrade by paying the fare difference. The sub fare class is what matters. If your fare is non refundable then no. Short of just eating the cost and buying a J ticket. If you paid a lot and are in W class (full fare PEY), the difference might only be 1k USD. But most likely more.

Fyi Asia Miles are only eligible for W and E class upgrades. No E.

There is no let's make a deal, aka a reduced fare upgrade sale.

The status is irrelevant.