Flight Kansai International Airport departs from Osaka Kansai International Airport at 12:15 and arrives at Hangzhou Hangzhou Xiaoshan International Airport at 13:55.
The flighttime is about 2h 40m. The distance travelled ("as the bird flies"): 1670 Km. So the average speed is roughly 626 Km.
There is an 1 hour time difference between Osaka and Hangzhou