Flight Noi Bai International Airport departs from Hanoi Noi Bai International Airport at 07:55 and arrives at Osaka Kansai International Airport at 14:30.
The flighttime is about 4h 35m. The distance travelled ("as the bird flies"): 3339 Km. So the average speed is roughly 729 Km.
There is an 2 hour time difference between Hanoi and Osaka