Flight Taoyuan International Airport departs from Taipei Taoyuan International Airport at 02:50 and arrives at Busan Gimhae International Airport at 06:10.
The flighttime is about 2h 20m. The distance travelled ("as the bird flies"): 1071 Km. So the average speed is roughly 459 Km.
There is an 1 hour time difference between Taipei and Busan
