What does PN availability really mean on an Intl flight?
So I get that PN availability means instant upgrades on Y/B/M fares when on a CPU eligible fare.
But what does it mean on an international fare?
I just booked a fare to SYD with PN avail and did the M class (as a 1K) and you guessed it, nothing happened.*
What's interesting, is that earlier today, my GS friend tried searching on it and it showed him as upgradable with a GPU.
Would his GPUs work on my reservation? even at W fare?
*UA shows $639 upgrade price on both going and coming - but when you click it, it totals $3,200. Must be some glitch on the site.
So is PN avail only for GS? Or for GS certs on anyone's ticket?