Flight Changi Airport departs from Singapore Changi Airport at 14:10 and arrives at Taipei Taoyuan International Airport at 18:55.
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 Singapore is Tuesday and it would be best to avoid Sunday, as prices are on average 204.03% higher than on Tuesday. (Average prices, based on 666029 datapoints.)
We have a lot more statistics for flights TR 992 and between Singapore and Taipei.