About Noi Bai (HAN)
Noi Bai International Airport is the main airport of northern Vietnam and the gateway to the capital, Hanoi. Operated by state company ACV, it is the country's second-busiest airport and the principal hub for reaching the north, including Halong Bay, Sapa and the Old Quarter. It lies about 35 km north of the city centre, roughly a 45–60 minute drive depending on traffic.
The airport has two terminals: T1 for domestic flights and T2 for international flights, set a short distance apart and linked by a free shuttle bus, so confirm your terminal before arriving. Both offer shops, dining, lounges, currency exchange and free Wi-Fi. For getting into town, the orange public bus 86 runs directly to the Old Quarter and Hanoi Railway Station, alongside metered taxis and ride-hailing.