Originally Posted by cxfan1960

Full or upgrade redemption for 9-31 December SFO or LAX flight is pretty much impossible to clear. You can try to extend, but I don't think they will.

However, you can still try again after your waitlist is gone. I got an upgrade this way 2-3 years ago.

In addition, you still have a chance to do instant upgrade at the airport (assuming you are using your own miles or traveling with your AM sponsor).