Priceline's profits have grown for years, driven by people searching for hotel rooms, who tend to be its most lucrative customers. Its heavy reliance on the hotel business has long insulated it from a pullback in air travel, which makes up a smaller share of sales. The company recently completed its $1.8 billion acquisition of leading travel-search aggregator Kayak Software Corp., a deal that gives Priceline a large base of new site traffic. Website changes at Google and TripAdvisor did little to slow Priceline's growth, which has accelerated over the past year after a slowdown in Europe cut into new bookings. Google and TripAdvisor make money feeding business to booking services like Priceline through advertising links on their websites. Priceline spent heavily to expand its U.S. presence and improved results largely at the expense of rival Expedia, a pressure that Expedia acknowledged when it reported earnings recently. Get the full story at The Wall Street Journal, Reuters. and Priceline