Skyscanner is one of the best flight search engines, if not the absolute best. The thing is, the app analyzes flight offers from all airlines around the world. The system automatically compares the received options, sorting them by price. All the user needs to do is enter the departure and arrival points.

Skyscanner boasts a very convenient and functional set of features. First, you can view prices for your desired route on different days of the month, and you can even set a parameter for the search engine to show you the cheapest month to fly for a given route. Second, you can set up price drop notifications for a specific route.

Based on user experience, Skyscanner shows the maximum possible flight options to Vietnam. Users often find better deals here than through other flight search engines. The app's filter allows you to get information not only on direct flights, but also on flights with layovers, and you can even specify the acceptable number of layovers.