Originally Posted by jarino
you're right, X isn't (anymore ?) a revenue class on SA, though it is still shown in the GDS.
according to this
thread, class W is for upgrades to business class.
That thread pre-dates SA in *A.
thijsseh is more up to date.
I notice a bunch of strange new codes for SA on KVS:
F
P A
U
C J Z
D R
W is now an economy class with some other new ones.
The ones I've put in bold italic can't be award classes. Wonder what they are?