Priceline Group: priceline.com, agoda.com, booking.com, cheapflights.com, ctrip.com, KAYAK, Momondo.com, Opentable.com, rentalcars.com, Rocketmiles
Expedia, Inc.: Expedia.com, Carrentals.com, Classic Vacations, eLong.com, HomeAway, Hotels.com, Hotwire, Orbitz Worldwide, Travelocity, Traveldoo, Trivago, Venere, Wotif Group