Flight Changi Airport departs from Singapore Changi Airport at 07:00 and arrives at Taipei Taoyuan International Airport at 11:45.
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 Monday and it would be best to avoid Saturday, as prices are on average 280.62% higher than on Monday. (Average prices, based on 1326844 datapoints.)
We have a lot more statistics for flights TR 892 and between Singapore and Taipei.