Originally Posted by
BenjaminNYC
Huh? One can easily buy up from A to F (both First Class).
SQ flights on 380 only offer one booking class "R" for First Class.So there is no option to buy up in First. My Guess.
In Business SQ flight on 380 offer D, C, I know ,
I think another discounted Business booking class, thus one can buy up in Business.
Originally Posted by whlinder
My guess for this is that the GDS' recognize F and R as the same class. Officially (IATA rules) there are only 3 cabins, F, J and Y and there are no plans to add a 4th. R is a subset of the F cabin and I believe buying up to a higher cabin using a differential can only occur between different cabins. I don't think you can buy a differential to a higher booking code. The GDSs probably don't have the functionality (yet, if ever) to allow that.