Originally Posted by
Zeeb
I've run into situations where changing my outgoing flight changed the ticket class of my return. Did you have a Y ticket that changed to something else when you did the change? That would explain why a confirmed upgrade (from the full Y fare) might disapear if it became a Q fare or something like that.
Nope checked that, my class was the same before and after (wasn't a Y to begin with.) I got the upgrade because I have PM and the flight wasn't close to sold out - when I made my flight change half of first class was still open.