Flight Changi Airport departs from Singapore Changi Airport at 02:15 and arrives at Seoul Incheon International Airport at 09:50.
The flighttime is about 6h 35m. The distance travelled ("as the bird flies"): 2923 Km. So the average speed is roughly 444 Km.
There is an 1 hour time difference between Singapore and Seoul
The best day to arrive at Singapore is Monday and it would be best to avoid Sunday, as prices are on average 260.2% higher than on Monday. (Average prices, based on 930016 datapoints.)
We have a lot more statistics for flights 7C 2622 and between Singapore and Seoul.
