Flight Lukou Airport departs from Nanjing Lukou Airport at 13:20 and arrives at Osaka Kansai International Airport at 17:00.
The flighttime is about 2h 40m. The distance travelled ("as the bird flies"): 1830 Km. So the average speed is roughly 686 Km.
There is an 1 hour time difference between Nanjing and Osaka