Flight Changi Airport departs from Singapore Changi Airport at 02:30 and arrives at Seoul Incheon International Airport at 09:50.
The flighttime is about 6h 20m. The distance travelled ("as the bird flies"): 2923 Km. So the average speed is roughly 462 Km.
There is an 1 hour time difference between Singapore and Seoul
The best day to arrive at Singapore is Sunday and it would be best to avoid Wednesday, as prices are on average 85.73% higher than on Sunday. (Average prices, based on 919800 datapoints.)
We have a lot more statistics for flights OZ 6726 and between Singapore and Seoul.
