Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 14:20 and arrives at Singapore Changi Airport at 18:55.
The flighttime is about 4h 35m. The distance travelled ("as the bird flies"): 2134 Km. So the average speed is roughly 466 Km.
The best day to arrive at Taipei is Friday and it would be best to avoid Thursday, as prices are on average 134.63% higher than on Friday. (Average prices, based on 488854 datapoints.)
We have a lot more statistics for flights SQ 877 and between Taipei and Singapore.