Hanoi - Hai Phong Bus
Haiphong is a beautiful beach city which is 102 km away from Hanoi. From Luong Yen Terminal, you can buy a ticket with VND140,000/one way ($7) and enjoy the 2-hour-journey to the famed city of flamboyant flame trees, curving shoreline and delicious seafood. You can also visit Cat Ba Island from Haiphong city.
Another option is to take the train (2 hour) from Hanoi Train Station to Hai Phong. The bus, however, is faster and more convenient.
Hanoi is connected to the rest of Vietnam and the world by multiple means of transportation.
Most sights and accommodations are in Hoan Kiem District (downtown), centered around the picturesque Hoan Kiem Lake, and Ba Dinh, Dong Da or Hai Ba Trung districts. Most addresses include a district name. You'll want to plan your travels accordingly because getting from one district to another can be time-consuming. Within the downtown, you can easily walk from a spot to another.
The main airport that serves Hanoi and many surrounding Northern provinces is Noi Bai International Airport (HAN).