Originally Posted by EmailKid

Sure, but I would be more worried about United's ability to get you there / from there

I have done three of these trips, which means to / from PEK which went fine, first to / from PVG also fine, last trip not so much ....

All excited as I scored my first and only OpUp (as did a LOT of elites when it turned out that a big tour group was all there with zero no shows), alas a few days before my return trip got an email from UA that PVG-SFO for my return date (and ONLY that date) was cancelled.

Sure enough, you could not buy a ticket for this date, the United cargo site did not show the flight ...

Several phone calls later after at least TWO agents insisted that "yes, there is a flight that day" finally got someone to recognize the fact that NO, there is no flight TO or FROM on that day and got rerouted via KIX, so lost my last day in Shanghai due to early morning departure.

I realize that I am almost certainly an outlier, but that was part of FOUR year run where I lost a day of vacation due to UA mechanicals and cancelled flights every year

TWOV, OTOH, never a problem, especially in Asia where they probably see more of that.