Flight Incheon International Airport departs from Seoul Incheon International Airport at 15:10 and arrives at Tokyo Narita International Airport at 17:30.
The flighttime is about 2h 20m. The distance travelled ("as the bird flies"): 1555 Km. So the average speed is roughly 666 Km.
The best day to arrive at Seoul is Wednesday and it would be best to avoid Thursday, as prices are on average 177.4% higher than on Wednesday. (Average prices, based on 5705074 datapoints.)
We have a lot more statistics for flights ZE 603 and between Seoul and Tokyo.
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