Flight Noi Bai International Airport departs from Hanoi Noi Bai International Airport at 01:45 and arrives at Manila Ninoy Aquino International Airport at 06:25.
The flighttime is about 3h 40m. The distance travelled ("as the bird flies"): 1715 Km. So the average speed is roughly 468 Km.
There is an 1 hour time difference between Hanoi and Manila