Having worked on tripadvisor's flights product, all I can say is "well, duh."<p>Seems to me there is room for a disruptive hotel booking startup. A Kayak Explore like interface that included the total cost of a trip (mid-range hotel and cost of a flight) would be killer.<p>Or even better, one that also offered/priced alternative methods of travel. Here on the east coast, now that air travel has been turned into a massive ordeal and time sink by the TSA, bus and train are often quicker, cheaper and more convenient alternatives.