Originally Posted by
Meneer Guggenheimer
BOS-AMS on Delta... I asked for the upgrade fee...
It was 6.000 to 10.000 U$.
They where not sure but it would be in that price range.
From what I've been told by Delta they do not do buy ups at OLCI in the same way KLM and other airlines do them. If you want Business you have to pay a Business Class fare so likely you were just quoted the difference between Y and C.