Flight Narita International Airport departs from Tokyo Narita International Airport at 09:20 and arrives at Seoul Incheon International Airport at 11:45.
The flighttime is about 2h 25m. The distance travelled ("as the bird flies"): 1555 Km. So the average speed is roughly 643 Km.
The best day to arrive at Tokyo is Friday and it would be best to avoid Monday, as prices are on average 387.58% higher than on Friday. (Average prices, based on 3826902 datapoints.)
We have a lot more statistics for flights JL 5201 and between Tokyo and Seoul.
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