Originally Posted by
vgb2001
Nothing unusual. just means DL has not released upgrade inventory on this route yet. It can happen anytime between now and boarding. If not before gate, you will likely be near the top of the list because of the Y fare. Only DM on Y and DM and Plat with an upgrade instrument will be ahead of you. You can wait till OLCI and check your position on the list before applying a SWU if necessary. If the SWU is going to be wasted anyway, you can call and apply it now.
+1. I don't why people think this is so unusual. If the Y upgrade was not subject to upgrade inventory restrictions, it would essentially be the same thing as a F fare.