Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 21:20 and arrives at Bangalore Kempegowda International Airport at 23:25.
The flighttime is about 3h 35m. The distance travelled ("as the bird flies"): 2567 Km. So the average speed is roughly 716 Km.
There is an 1.5 hour time difference between Bangkok and Bangalore