Momondo
Booking Holdings
Cheapflights
Priceline.com
Expedia
Booking.com
Agoda
Expedia Group
Skyscanner
Orbitz
Tripadvisor
OpenTable
Airbnb
Hotels.com
Baidu
Fare aggregator and travel metasearch engine
kayak.com
Kayak is a metasearch engine for travel services, including airline flights, hotels, rental cars, and vacation packages. It is owned and operated by Booking Holdings. Wikipedia