Originally Posted by Always Flyin
If the other person is not on the same PNR as you, but you are both on the same flight segment, I think you can still sponsor them up to E+, but I am not 100% certain.
Yes, you can still sponsor them into E+. I've done it several times when I travel with my gf on seperate PNRs but same segments.
I also link the PNRs in case something does go wrong and an agent happens to read it.