Flight Changi Airport departs from Singapore Changi Airport at 08:15 and arrives at Bangkok Suvarnabhumi Airport at 09:35.
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 Saturday and it would be best to avoid Sunday, as prices are on average 39.02% higher than on Saturday. (Average prices, based on 13010324 datapoints.)
We have a lot more statistics for flights TG 402 and between Singapore and Bangkok.