Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 16:30 and arrives at Shanghai Pudong International Airport at 18:35.
The flighttime is about 2h 05m. The distance travelled ("as the bird flies"): 358 Km. So the average speed is roughly 172 Km.
The best day to arrive at Taipei is Tuesday and it would be best to avoid Monday, as prices are on average 49.36% higher than on Tuesday. (Average prices, based on 139470 datapoints.)
We have a lot more statistics for flights CI 503 and between Taipei and Shanghai.