Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 13:20 and arrives at Kunming Wujiaba International Airport at 16:55.
The flighttime is about 2h 35m. The distance travelled ("as the bird flies"): 337 Km. So the average speed is roughly 130 Km.
There is an 1 hour time difference between Bangkok and Kunming