While it may feel like a monopoly, Expedia Group does not own all travel sites in 2026, though it is one of the two massive "duopolies" that dominate the market. Expedia's portfolio includes Hotels.com, Vrbo, Orbitz, Travelocity, and Trivago. However, its primary rival is Booking Holdings, which owns Booking.com, Priceline, Agoda, and KAYAK. Together, these two giants control nearly 90% of the Western OTA (Online Travel Agency) market. Beyond these two, there are significant independent players like Airbnb, and the "Trip.com Group" (including Skyscanner), which is a dominant force in Asia. Google Travel has also become a massive competitor in 2026, acting as a meta-search engine that often bypasses the traditional OTAs. For travelers, this means that while many sites share the same backend data, there are still several distinct "families" of travel sites to compare when looking for the best deals.