Flight Changi Airport departs from Singapore Changi Airport at 01:00 and arrives at Taipei Taoyuan International Airport at 05:35.
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 Singapore is Wednesday and it would be best to avoid Tuesday, as prices are on average 81.53% higher than on Wednesday. (Average prices, based on 784631 datapoints.)
We have a lot more statistics for flights TR 898 and between Singapore and Taipei.