Booking.comis one of the largest online travel agencies . It is headquartered in Amsterdam , and is a subsidiary of Booking Holdings . [1] In 2022, the company's mobile app was the most downloaded mobile app in the travel agency category. [2] As of December 31, 2022, Booking.comoffered lodging reservation services for approximately 2.7 million properties, including 400,000 hotels, motels, and resorts and 2.3 million homes, apartments in over 220 countries and in over 40 languages. It also offers flights in 54 markets and tours and activities in more than 1,200 cities.