Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 18:10 and arrives at Hong Kong Hong Kong International Airport at 20:05.
The flighttime is about 1h 55m. The distance travelled ("as the bird flies"): 826 Km. So the average speed is roughly 431 Km.
The best day to arrive at Taipei is Thursday and it would be best to avoid Friday, as prices are on average 124.82% higher than on Thursday. (Average prices, based on 3458778 datapoints.)
We have a lot more statistics for flights CI 923 and between Taipei and Hong Kong.