Originally Posted by
EJRofChicago
How long has it been possible to purchase a paid upgrade on an award ticket? After redeeming 40k miles for a saver award US>Europe, I was offered premium economy for $375. Definitely worth it, in my opinion, so I took it.
On UA, many years. Prior to last couple of years it was only at check-in,, now it can be anytime after booking.