Noi Bai International Airport Noi Bai International Airport (IATA: HAN, ICAO: VVNB) (Vietnamese: Sân bay Quốc tế Nội Bài), the biggest airport in northern Vietnam, serves the capital city Hanoi. The airport is 28 miles (45 km) from the city's downtown. Travel time by taxi takes between 30 to 45 minutes. Transportation Hanoi ...