Flight Narita International Airport departs from Tokyo Narita International Airport at 09:15 and arrives at Seoul Incheon International Airport at 12:00.
The flighttime is about 2h 45m. The distance travelled ("as the bird flies"): 1555 Km. So the average speed is roughly 565 Km.
The best day to arrive at Tokyo is Wednesday and it would be best to avoid Friday, as prices are on average 149.64% higher than on Wednesday. (Average prices, based on 4427150 datapoints.)
We have a lot more statistics for flights KE 706 and between Tokyo and Seoul.
