Flight Changi Airport departs from Singapore Changi Airport at 18:15 and arrives at Bangkok Suvarnabhumi Airport at 19:35.
The flighttime is about 2h 20m. The distance travelled ("as the bird flies"): 462 Km. So the average speed is roughly 198 Km.
There is an 1 hour time difference between Singapore and Bangkok
The best day to arrive at Singapore is Sunday and it would be best to avoid Thursday, as prices are on average 67.15% higher than on Sunday. (Average prices, based on 10273739 datapoints.)
We have a lot more statistics for flights TG 408 and between Singapore and Bangkok.