Originally Posted by themicah
http://www.nwa.com/freqfly/direct/charts/europe.html
"Coach full fare" (the 15k upgrade award) = Y fare
"Select coach fares" (the 30k upgrade award) = B fare
Nothing else is upgradeable.
So yes, you got lucky with the 20k for the companion. Not sure what that's about.
I just upgraded two B fares for 15k each. The rules seem more like "guidelines" from how they get applied.