Kayak

Kayak is a travel metasearch engine, part of Booking Holdings, that compares flight fares from airlines and booking sites and links out to complete the purchase. Its flight tools go beyond a basic search: flexible-date grids, price alerts and a price forecast that suggests whether to buy now or wait, based on historical fare movements. Hacker Fares combine one-way tickets on different airlines when that produces a lower total, which can save money but means the legs are separate bookings. Filters cover bag fees, layover length, airlines and cabin. Kayak suits travellers who want to see the wider fare landscape before choosing a seller. The trade-off is that it does not normally handle the ticket itself, so customer service, refunds and changes depend on the airline or agency chosen.