Flight Incheon International Airport departs from Seoul Incheon International Airport at 00:30 and arrives at Taipei Taoyuan International Airport at 02:15.
The flighttime is about 2h 45m. The distance travelled ("as the bird flies"): 958 Km. So the average speed is roughly 348 Km.
There is an 1 hour time difference between Seoul and Taipei
The best day to arrive at Seoul is Tuesday and it would be best to avoid Friday, as prices are on average 245.01% higher than on Tuesday. (Average prices, based on 2442692 datapoints.)
We have a lot more statistics for flights IT 603 and between Seoul and Taipei.