Originally Posted by
sts603
But there's a difference between the fare basis and the class that it books into. Yes YUPs book into A/P on mainline jets if A or P is available. Otherwise they book into Y (and always do on Eagle/Connection as there is no A or P).
They are still Y fares as defined by the fact that the first letter of the fare is always the fare basis/class.
The thread is about two coach classes, Y and B. The subject of some Y fares that book into A is simply off-topic and will lead many to be confused in this thread.