Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 19:35 and arrives at Hong Kong Hong Kong International Airport at 21:30.
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 Sunday, as prices are on average 45.16% higher than on Thursday. (Average prices, based on 4429241 datapoints.)
We have a lot more statistics for flights CX 451 and between Taipei and Hong Kong.