Flight Noi Bai International Airport departs from Hanoi Noi Bai International Airport at 19:45 and arrives at Phnom Penh Phnom Penh International Airport at 21:45.
The flighttime is about 2h 00m. The distance travelled ("as the bird flies"): 303 Km. So the average speed is roughly 152 Km.
The best month to arrive at Hanoi is March and the most expensive month to fly is June. (Average prices, based on 2796 datapoints.)
We have a lot more statistics for flights K6 851 and between Hanoi and Phnom Penh.