Flight Suvarnabhumi Airport departs from Bangkok Suvarnabhumi Airport at 20:45 and arrives at Ahmedabad Sardar Vallabhbhai Patel International Airport at 00:10.
The flighttime is about 4h 55m. The distance travelled ("as the bird flies"): 3117 Km. So the average speed is roughly 634 Km.
There is an 1.5 hour time difference between Bangkok and Ahmedabad