Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 08:05 and arrives at Singapore Changi Airport at 12:35.
The flighttime is about 4h 30m. The distance travelled ("as the bird flies"): 2134 Km. So the average speed is roughly 474 Km.
The best day to arrive at Taipei is Saturday and it would be best to avoid Thursday, as prices are on average 144.18% higher than on Saturday. (Average prices, based on 1012867 datapoints.)
We have a lot more statistics for flights CI 753 and between Taipei and Singapore.
