Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 17:35 and arrives at Singapore Changi Airport at 22:20.
The flighttime is about 4h 45m. The distance travelled ("as the bird flies"): 2134 Km. So the average speed is roughly 449 Km.
The best day to arrive at Taipei is Tuesday and it would be best to avoid Saturday, as prices are on average 135.26% higher than on Tuesday. (Average prices, based on 956511 datapoints.)
We have a lot more statistics for flights SQ 879 and between Taipei and Singapore.
