Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 00:35 and arrives at Osaka Kansai International Airport at 10:00.The flight has a short stop at Taipei.
The flighttime is about 7h 25m. The distance travelled ("as the bird flies"): 3931 Km. So the average speed is roughly 530 Km.
There is an 2 hour time difference between Bangkok and Osaka