Flight Narita International Airport departs from Tokyo Narita International Airport at 19:15 and arrives at Seoul Incheon International Airport at 21:45.
The flighttime is about 2h 30m. The distance travelled ("as the bird flies"): 1555 Km. So the average speed is roughly 622 Km.
The best day to arrive at Tokyo is Monday and it would be best to avoid Wednesday, as prices are on average 73.25% higher than on Monday. (Average prices, based on 4489776 datapoints.)
We have a lot more statistics for flights LJ 212 and between Tokyo and Seoul.
