Flight Kansai International Airport departs from Osaka Kansai International Airport at 14:45 and arrives at Singapore Changi Airport at 20:10.
The flighttime is about 6h 25m. The distance travelled ("as the bird flies"): 3803 Km. So the average speed is roughly 593 Km.
There is an 1 hour time difference between Osaka and Singapore
The best day to arrive at Osaka is Saturday and it would be best to avoid Thursday, as prices are on average 206.68% higher than on Saturday. (Average prices, based on 150213 datapoints.)
We have a lot more statistics for flights TR 819 and between Osaka and Singapore.
THB