Flight Changi Airport departs from Singapore Changi Airport at 08:00 and arrives at Bangkok Suvarnabhumi Airport at 09:20.
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 Monday and it would be best to avoid Tuesday, as prices are on average 84.2% higher than on Monday. (Average prices, based on 9706661 datapoints.)
We have a lot more statistics for flights CX 402 and between Singapore and Bangkok.