Flight Narita International Airport departs from Tokyo Narita International Airport at 19:30 and arrives at Taipei Taoyuan International Airport at 22:45.
The flighttime is about 4h 15m. The distance travelled ("as the bird flies"): 2260 Km. So the average speed is roughly 532 Km.
There is an 1 hour time difference between Tokyo and Taipei
The best day to arrive at Tokyo is Saturday and it would be best to avoid Friday, as prices are on average 177.03% higher than on Saturday. (Average prices, based on 2320062 datapoints.)
We have a lot more statistics for flights CI 109 and between Tokyo and Taipei.
