Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 13:35 and arrives at Osaka Kansai International Airport at 17:15.
The flighttime is about 2h 40m. The distance travelled ("as the bird flies"): 1682 Km. So the average speed is roughly 631 Km.
There is an 1 hour time difference between Taipei and Osaka