Flight Noi Bai International Airport departs from Hanoi Noi Bai International Airport at 20:05 and arrives at Beijing Daxing International Airport at 00:20.
The flighttime is about 3h 15m. The distance travelled ("as the bird flies"): 1375 Km. So the average speed is roughly 423 Km.
There is an 1 hour time difference between Hanoi and Beijing
