"What often goes overlooked is how rapidly Priceline's European brand Booking.com has grown in the U.S., because 100% of Booking's volume is reported in Priceline's international business," Quinby said. "Booking.com has become the largest seller of (hotel rooms) in the U.S." Expedia's many brands, besides Expedia.com, include Hotels.com, China-based eLong (NASDAQ:LONG), discount travel website Hotwire, metasearch site Trivago, CarRentals.com, hotel reservation specialist Venere.com and business travel provider Egencia. Expedia says it will retain the Travelocity brand. Integrating Travelocity's systems and business had a big impact on Expedia's U.S. bookings starting in Q1 2014, RBC Capital Markets analyst Mark Mahaney said in a research report last month. Get the full story at Investor's Business Daily