Flight search engines are online tools that help travelers find and compare flight options from various airlines. They allow users to enter their departure and arrival locations, travel dates, and preferences to generate a list of available flights. These platforms often display prices, flight durations, and layover information, making it easier for users to choose the best option for their needs. Many flight search engines also offer additional features, such as price alerts and flexible date searches. Popular examples include Google Flights, Skyscanner, and Kayak. By aggregating data from multiple sources, these engines save time and help users find the best deals on air travel.