Flight Incheon International Airport departs from Seoul Incheon International Airport at 12:35 and arrives at Taipei Taoyuan International Airport at 14:10.
The flighttime is about 2h 35m. The distance travelled ("as the bird flies"): 958 Km. So the average speed is roughly 371 Km.
There is an 1 hour time difference between Seoul and Taipei
The best day to arrive at Seoul is Sunday and it would be best to avoid Monday, as prices are on average 304.44% higher than on Sunday. (Average prices, based on 2440826 datapoints.)
We have a lot more statistics for flights HA 2871 and between Seoul and Taipei.