海南航空 is a travel and navigation app developed by Hainan Airlines Holding Co. Ltd. It offers a range of self-service features including flight booking and payment, flight status tracking, mobile check-in, and member mileage inquiry. The app aims to provide users with a convenient and personalized travel experience.

The app allows users to easily book and modify flights, as well as upgrade their seats. It provides accurate information on international and domestic flight schedules and delays, ensuring users stay informed about their travel plans. Additionally, users can conveniently select their preferred seats in advance, making their journey more comfortable.

海南航空 also offers exclusive upgrades for app users, enhancing their travel experience. Users can redeem their accumulated points for free tickets on Hainan Airlines and other partner airlines. The app also provides various additional services such as meal reservations, paid luggage, flight record tracking, and lost baggage assistance.

Overall,海南航空 is a user-friendly and efficient app that offers a range of features to enhance the travel experience. Whether you're booking a flight, checking flight status, or selecting seats, this app provides a seamless and convenient way to manage your travel plans.