Originally Posted by
Sam Bee
So I guess i'm looking at AF/KL, CX, SQ (QF?) for Y to Y+, and chuck in EK & EY & AY (just using SIN/KUL as can easily connect onwards) for a one way Business upgrade - but without scouring every FFP, are their any airline that allows upgrade (at reasonable mileage options) on cheapest Y fare bucket?
AY allows upgrades from any of the booking classes to J.