<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by ResAgent86:
What I posted is true, but could you be specific about which part is new news?</font>
The part that's news to me is:
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">But you can upgrade less than 72 hours prior to a flight if you buy a "Y" fare and use "Z" class--not for most wallets</font>
I was not aware that an upgrade for Y was available less than 72 hours. Although you're correct in saying that the Y fare is typically very expensive, it's only about half that of the BF fare, so if it came down to either buying a BF fare, or upgrading your coach ticket to Y then using miles to upgrade into Z, the latter would be the way to do it.