, Ryanair hit out against a number of online travel agents, including Booking.com, Kiwi and Kayak, after it said its flights had been suddenly removed from their websites.The airline reduced fares to fill seats in December after it said sites including Booking.com, Kiwi and Kayak suddenly removed its flights.In January, Ryanair hit out against a number of online travel agents, including Booking.com,