In some big cities as Hanoi and Ho Chi Minh City, visitors can get to the centre by bus.
Airport Taxis charge a flat rate of US$ 10 (one-way) for cars from Noi Bai Airport to central Hanoi. The drive takes about 45 minutes. A minibus makes the trip for US$ 4 per person.
Fare for buses No. 7 Kim Ma - Noi Bai and No. 17 Long Bien - Noi Bai is VND 5,000. There is a bus every 15 - 20 minutes.
In Ho Chi Minh City:
A metered cab from Tan Son Nhat Airport to downtown costs around VND 50,000. The trip takes about 20 minutes.