Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 16:30 and arrives at Hong Kong Hong Kong International Airport at 18:45.
The flighttime is about 2h 15m. The distance travelled ("as the bird flies"): 826 Km. So the average speed is roughly 367 Km.
The best day to arrive at Taipei is Saturday and it would be best to avoid Sunday, as prices are on average 130.42% higher than on Saturday. (Average prices, based on 5192188 datapoints.)
We have a lot more statistics for flights HX 265 and between Taipei and Hong Kong.