Flight Haneda Airport departs from Tokyo Haneda Airport at 15:55 and arrives at Seoul Incheon International Airport at 18:35.
The flighttime is about 2h 40m. The distance travelled ("as the bird flies"): 1487 Km. So the average speed is roughly 558 Km.
The best day to arrive at Tokyo is Wednesday and it would be best to avoid Friday, as prices are on average 196.96% higher than on Wednesday. (Average prices, based on 1235852 datapoints.)
We have a lot more statistics for flights NH 865 and between Tokyo and Seoul.
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