I see R inventory for a flight to europe I'd like to take next year: won't have GPUs to apply till the end of August.
Can I get the seats with miles/money to upgrade, since R is available, and then call United to switch the upgrade instrument to a GPU when I have them? And then get the miles/money refunded to my account?
(It is too bad that one has to check with FT before calling UA directly, since I don't know if I can rely on information given by a Agent who may or may not know the answer).