Originally Posted by
STS-134
Okay, additional question: if I want to get an upgrade offer, when's the best time to check in? Exactly at T-24? T-12? Right before heading to the airport? Does UA changes the prices of the offers (adjusting downward, if people aren't taking them)? Also, is it better to check in on UA.com or on the Android app?
As another poster suggested, have you looked at what the buy up offer is right now?
I am sure you know this, but from your reservation go to the redeem upgrade tab, and click on the buy up to first option to check it out.
It may just be cheap enough right now for you to buy it.
(The only way I am aware to go from Y to F is with a glitch that used to be in the .bomb system. If you were in Y (W), and applied a GPU that got waitlisted, you would receive a buy up offer to GF at that point. I am not sure if that glitch is still around. It helped us get to Australia in Global F a couple of years ago though!)