Originally Posted by
thijsseh
Just a few quick answers:
2. As far as I understand, auto upgrade cancels at T-72. It is very unlikely that from then onward ‘normal’ upgrades will be available (maybe even impossible).
ATH - EWR last week, was able to upgrade J to F award online about 10 hours before departure. Showed on manage booking page as upgrade available, clicked through and was confirmed in F in 15 seconds.
So it is possible between 72 hours and the airport, although my guess is this is unlikely in most instances.