Flight Changi Airport departs from Singapore Changi Airport at 00:50 and arrives at Tokyo Narita International Airport at 08:40.
The flighttime is about 6h 50m. The distance travelled ("as the bird flies"): 4385 Km. So the average speed is roughly 642 Km.
There is an 1 hour time difference between Singapore and Tokyo
The best day to arrive at Singapore is Tuesday and it would be best to avoid Wednesday, as prices are on average 632.47% higher than on Tuesday. (Average prices, based on 706238 datapoints.)
We have a lot more statistics for flights NQ4 and between Singapore and Tokyo.