Booking.com
Global OTA with hotels, vacation rentals, and apartments. Known for its deep inventory and flexible cancellations.
HolidayPirates / TravelPirates
HolidayPirates (TravelPirates in the US) is a deal-discovery platform offering cheap flights, hotels, and travel packages.
Kiwi.com
Kiwi.com is a flight search and booking platform specializing in virtual interlining and unique multi-carrier itineraries.
MyTrip
MyTrip is an international OTA offering flights, hotels, car rentals, and travel extras with strong coverage across Europe and worldwide destinations.
Travix
Travix is a Netherlands-based global OTA operating brands like CheapTickets, Vliegwinkel, and BudgetAir with broad flight coverage.