Understanding where to book requires distinguishing between two types of platforms:
Sites like Skyscanner , Google Flights , and KAYAK do not sell tickets. They "scrape" data from hundreds of sources to show you who has the lowest price. cheapest website to buy plane tickets
The "cheapest" website is not a single destination, but a variable result of how and Online Travel Agencies (OTAs) interact with airline algorithms. For 2026, Momondo has been ranked as the #1 airfare search site due to its ability to find the lowest prices for both advance and last-minute bookings without sacrificing user experience. The Hierarchy of Flight Booking For 2026, Momondo has been ranked as the
Sites like Expedia , Priceline , and CheapOair actually sell the ticket. They often negotiate bulk "private fares" that can be cheaper than the airline's direct price. The 10 Best (and Cheapest) Airfare Search Sites for 2026 The 10 Best (and Cheapest) Airfare Search Sites for 2026