Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 22:10 and arrives at Hyderabad Rajiv Gandhi International Airport at 00:10.
The flighttime is about 3h 30m. The distance travelled ("as the bird flies"): 2481 Km. So the average speed is roughly 709 Km.
There is an 1.5 hour time difference between Bangkok and Hyderabad