Originally Posted by
manneca
The only "free" international upgrades on UA come with the system wide upgrades (I think they have a new name) which you get as a 1K. The exception is some international flights mainly to South and Central America and the Caribbean. My experience with the SWUs this year is that I got 4 upgrades out of the many I tried for.
They are not free. You have to buy more expensive fare classes to redeem them. TATL, it's about $150-200 more each way.