Flight comparison websites are online tools that help travelers find the best deals on airline tickets. By entering your travel details, such as departure and arrival cities, dates, and the number of passengers, these websites search multiple airlines and travel agencies to show you a list of available flights. This makes it easy to compare prices, flight times, and other important factors. These websites often include filters to narrow down your options based on preferences like layovers, flight duration, and airline loyalty programs. Popular flight comparison sites include Kayak, Skyscanner, and Google Flights, making it simple for anyone to plan their next trip.