Originally Posted by
NoLaGent
Yes, A GS GPU books into PN and yes, his GPU will work on your reservation and confirm immediately.
The $639 (+mileage, I'm assuming) books into R, just like a 1k's GPU and in this case, will be waitlisted.
No instant upgrades are available for int'l longhaul.
No -- if it were the mileage upgrade, it would be $600, not $639. $639 sounds like a buy-up price. UA will honor it if you call web support. However, it may not be some incredible deal -- it may just be the fare difference from M to P or Z. M is typically a very expensive fare.