Originally Posted by
samthemainman
Thanks all - but what about CASH upgrades? will BA upgrade the cathay sectors if I can pay the difference?
You would only be able to do a fare difference upgrade. You almost certainly have a MAD-SYD return fare so you can't really do a fare difference upgrade on just one segment, just the full outbound or inbound segments which would be the fare difference plus change fee from Y+ to J.