Flight Narita International Airport departs from Tokyo Narita International Airport at 19:30 and arrives at Shanghai Pudong International Airport at 22:05.
The flighttime is about 3h 35m. The distance travelled ("as the bird flies"): 2092 Km. So the average speed is roughly 584 Km.
There is an 1 hour time difference between Tokyo and Shanghai
The best day to arrive at Tokyo is Thursday and it would be best to avoid Saturday, as prices are on average 80.82% higher than on Thursday. (Average prices, based on 164334 datapoints.)
We have a lot more statistics for flights CA 920 and between Tokyo and Shanghai.