From HAN Airport to your destination: Taxis takes about 40 minutes to city-center; the fee is fixed, which includes toll charges. Airport-authorized taxi drivers always display their license with their photo and name on the taximeter.
Airport minibuses only leave when full. Both minibuses and taxis park right in front of the airport exit gate. Three companies operate several kinds of taxis and minibuses with nearly the same fare structure.
Currently Jetstar, Kumho Viet Thanh, & Vietnam Airlines provide their own minibuses to the city.

Buses: The bus stop for Hanoi city buses 07 & 17, connecting the Airport with the city-center, is just to the right of the terminal exit. The bus trip takes about an hour, and buses run 5am-10pm. Note that passengers with oversized luggage are often denied entry. 
Bus 7 connects to Cau Giay bus station in the western part of the City;
Bus 17 connects to the Long Bien bus station, which is near the Old Quarter.

Buses To City

Service Name: MINIBUS
Service Area: Airport Minibus offers transportation directly to your hotel or residence in Hanoi.
Fare Information: costs VND 22,000 for Vietnamese or VND 32,000 (US$2) for foreigners.

Buses To Surrounding Area

Service Name: PUBLIC BUS
Service Area: The bus stop is just on the right side of the terminal exit.
Fare Information: costs 5,000 VND (0.3 USD) per person and takes about one hour.
Notes: 15-20 minutes from 5 a.m. to 10 p.m

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