Qatar Airways flights from Doha to Hanoi typically arrive at Noi Bai International Airport (HAN). The airport has two terminals: Terminal 1, which is primarily for domestic flights, and Terminal 2, which is used for international flights.
There are multiple daily flights between Doha Hamad International Airport (DOH) and Haneda (HND) offered by Qatar Airways including direct and one-stop flights on Turkish Airlines, Thai Airways, or Emirates. For more information on the flights or for purchasing a ticket, you can go to the Qatar Airways official website or use their booking platform. Most of these flights use Terminal 2 for check-in and boarding whilst for arrival the flights use Terminal 3, which provides the boarding gates to the HND connections.