Originally Posted by
jk88usa
Its a known glitch where a lot of intl “business class” listed flights (or domestic segments continuing an intl flight number) show Not Eligble, but you are fully eligible for the upgrade on those segments.
It’s fast becoming nearly impossible to get F upgrades on mainline as Silver (for me at least) so enjoy them when you can!
You are actually not eligible for upgrades if you are on a PNR with 3 other individuals. Only you and one traveling companion in the same reservation are eligible. You could split the PNR which might help but honestly as an FO your odds of an upgrade are extremely unlikely.