Flight Incheon International Airport departs from Seoul Incheon International Airport at 17:50 and arrives at Denpasar Bali Ngurah Rai International Airport at 23:50.
The flighttime is about 7h 00m. The distance travelled ("as the bird flies"): 2831 Km. So the average speed is roughly 404 Km.
There is an 1 hour time difference between Seoul and Denpasar Bali