I've noticed that UA and other airline pricing this summer seems to provide a disincentive to book early which seems like a strange way to run a business. Specifically in the last few days, I've noticed that UA slashed fares to and from Hawaii in coach with their Hawaii Hula sale so that later bookers got better deals than the plan ahead types. I've also noticed this on UA fares BWI-YVR-BWI and LAS-YVR-LAS. What I've learned from all of this is to go to the airlines' websites, make a query on the flights I want and check seats--if the plane still has plenty of room with desireable seats available, maybe it's not time to book unless the price seems at the low end or you don't care because the employer is paying for the ticket or you've got bigger fish to fry. Of course, collectively, if all pax did this, it would bluff the airlines into putting everything on deep discount sale.