Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 20:05 and arrives at Singapore Changi Airport at 00:40.
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 Tuesday and it would be best to avoid Wednesday, as prices are on average 124.41% higher than on Tuesday. (Average prices, based on 497676 datapoints.)
We have a lot more statistics for flights CI 755 and between Taipei and Singapore.