Flight Noi Bai International Airport departs from Hanoi Noi Bai International Airport at 09:30 and arrives at Phnom Penh Phnom Penh International Airport at 13:00.
The flighttime is about 3h 30m. The distance travelled ("as the bird flies"): 303 Km. So the average speed is roughly 87 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.)
The best day to arrive at Hanoi is Monday and it would be best to avoid Sunday, as prices are on average 18.65% higher than on Monday. (Average prices, based on 460229 datapoints.)
We have a lot more statistics for flights SQ 921 and between Hanoi and Phnom Penh.