Priceline would see much more airline booking business, I suspect, if only they allowed one to select an acceptable timeframe, such as morning, afternoon or evening. Otherwise, that product is only good for long trips, when losing a day at the front (late departure) and/or the end (early return) is not a big deal. For a weekend, PL is not a realistic option. Most of my flights are for weekend getaways. The only time I considered using PL (and eventually did) was on a 9-day trip. As for the hotel business, that's indeed the real business. But it will immediately go belly up when Hotwire manage to lower their rates to match PL's, and advertize that fact effectively. When there's no difference in price, it makes much more sense to use Hotwire, where you can see some clues about what you're getting (amenity icons).