Originally Posted by
Kacee
I have no idea what you're talking about. UA routinely offers multiple connection choices, ranging from less than 1 hour to more than 12 hours, all on a single fare. Choosing the longer connection does not turn the ticket into two separate one-ways. It only becomes a stopover at 24 hours.
As far as the ticket, on an international itin, anything under 24 hours is a connection (and not a stopover). HOWEVER, any connection (international itin) over 12 hours* breaks a GPU -- so the agent was correct that a 12.5 hour connection would require separate upgrade instruments. (Note believe mileage upgrades are not bound by the same limitation.)
* Note -- some have reported online exceeding the 12 hour limitation at times (see up thread).