Originally Posted by
rylan
Hmmm... that helps with some UP fares that book into A such as this:
FARE CLS EXPLANATION BOOK CODES
-------- ---------------------- ----------
QA07UPNP ONE WAY INSTANT PURCHASE FARES Q/A/I
Although, DL automagically takes some standard fares and tacks on the WNUP and they book into P even though the base fare rules without the WNUP don't say P is in the booking codes.
Remember too that most (all, in the sense that A is a subset of P?) flights have more P than A inventory available.