Originally Posted by
airoli
... The UA agent I spoke to on the phone told me that the transborder segments in B are not eligible for instant upgrades, "this is only available domestically in the US".

Is that really so? ...
Works on any CPU eligible flight, the agent was mistaken
Originally Posted by
airoli
The agent also told me that I am waitlisted for upgrades on the transborder segments as part of my PlusPoints upgrade, but the segments don't show as "waitlisted" when I view the PNR on united.com . (If I recall correctly, on similar trips in the past they did show as waitlisted). Is that normal?
Could be true, depends on how you applied the PlusPoints