Flight Incheon International Airport departs from Seoul Incheon International Airport at 10:20 and arrives at Tokyo Narita International Airport at 12:55.
The flighttime is about 2h 35m. The distance travelled ("as the bird flies"): 1555 Km. So the average speed is roughly 602 Km.
The best day to arrive at Seoul is Tuesday and it would be best to avoid Thursday, as prices are on average 218.5% higher than on Tuesday. (Average prices, based on 6931092 datapoints.)
We have a lot more statistics for flights TW 243 and between Seoul and Tokyo.
