Flight Kansai International Airport departs from Osaka Kansai International Airport at 23:25 and arrives at Singapore Changi Airport at 04:45.
The flighttime is about 6h 20m. The distance travelled ("as the bird flies"): 3803 Km. So the average speed is roughly 600 Km.
There is an 1 hour time difference between Osaka and Singapore
The best day to arrive at Osaka is Friday and it would be best to avoid Tuesday, as prices are on average 2304.8% higher than on Friday. (Average prices, based on 257943 datapoints.)
We have a lot more statistics for flights NH 6261 and between Osaka and Singapore.
