Originally Posted by
crnk
Upgrades from X can happen, IF you're a UA elite with credit card. I don't think the ticket has to be issued by UA, does it?
The website just says UA-operated flights, no reference to a requirement of UA ticketed. Would be interesting to know whether it works on a ticket issued by an OAL. Although as a practical matter will be a rare circumstance b/c the cards are mostly only available to US residents.