Flight Incheon International Airport departs from Seoul Incheon International Airport at 23:15 and arrives at Singapore Changi Airport at 04:55.
The flighttime is about 6h 40m. The distance travelled ("as the bird flies"): 2923 Km. So the average speed is roughly 438 Km.
There is an 1 hour time difference between Seoul and Singapore
The best day to arrive at Seoul is Wednesday and it would be best to avoid Sunday, as prices are on average 111% higher than on Wednesday. (Average prices, based on 690243 datapoints.)
We have a lot more statistics for flights SQ 605 and between Seoul and Singapore.
