Originally Posted by
QRC3288
Redemptions 2: Cathay does offer a one-class redemption upgrade, but only certain sub fareclasses are eligible I believe. I *think* it's YBHKLV? But not 100% sure. If you're on an eligible fare class, and if redemption space opens up, I think you can use Asia Miles to upgrade your sector without impacting your underlying ticket.
For Economy, they now look at Light / Essential / Flex. You can book a stupidly high B fare and still not be eligible.