Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 13:05 and arrives at Bangalore Kempegowda International Airport at 15:40.
The flighttime is about 4h 05m. The distance travelled ("as the bird flies"): 2567 Km. So the average speed is roughly 629 Km.
There is an 1.5 hour time difference between Bangkok and Bangalore