In 2021, a variety of online travel agencies (OTAs) were highlighted for their flight booking capabilities, each offering unique features to help travelers find the best deals. Momondo was praised for its ability to find cheap last-minute tickets and provide price tracking tools, while Booking.com was noted for its low airfare prices and robust filtering options. Skyscanner stood out for incorporating low-cost airlines and providing a calendar of fares, and Kayak was recognized for its flexible fare tool and price alerts. Google Flights, a meta-search engine, offered price trend analysis and a map-based search function, whereas Hipmunk impressed with its visual presentation and comprehensive information. CheapOair was acknowledged for its quality fares and last-minute flight deals, and Expedia maintained its reputation with a unique tool for comparing itineraries and a rewards program. Despite their strengths, each platform had its drawbacks, such as basic features or cluttered interfaces, emphasizing the need to use multiple sites for the best deals.