Flight Changi Airport departs from Singapore Changi Airport at 23:00 and arrives at Seoul Incheon International Airport at 06:30.
The flighttime is about 6h 30m. The distance travelled ("as the bird flies"): 2923 Km. So the average speed is roughly 450 Km.
There is an 1 hour time difference between Singapore and Seoul
The best month to arrive at Singapore is November and the most expensive month to fly is September. (Average prices, based on 1604 datapoints.)
The best day to arrive at Singapore is Friday and it would be best to avoid Sunday, as prices are on average 25.9% higher than on Friday. (Average prices, based on 382716 datapoints.)
We have a lot more statistics for flights CX 752 and between Singapore and Seoul.