My anecdotal impression, from looking at travel for a number of fall trips, is that there are some decent deals out there, including fares in P. Been looking at mostly domestic + 1 trip to the Caribbean out of LAX. I've been looking to book in P, but have noticed some extremely low Y fares. Timeframe is September through November. I've even been seeing some $129 each way fares LAX-DCA in Y.