Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 03:40 and arrives at Wuhan Wuhan Tianhe International Airport at 08:10.
The flighttime is about 3h 30m. The distance travelled ("as the bird flies"): 1586 Km. So the average speed is roughly 453 Km.
There is an 1 hour time difference between Bangkok and Wuhan
