Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 16:35 and arrives at Hong Kong Hong Kong International Airport at 18:30.
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 91.98% higher than on Thursday. (Average prices, based on 4231610 datapoints.)
We have a lot more statistics for flights HX 1831 and between Taipei and Hong Kong.