Flight Incheon International Airport departs from Seoul Incheon International Airport at 07:00 and arrives at Da Nang Da Nang International Airport at 09:40.
The flighttime is about 4h 40m. The distance travelled ("as the bird flies"): 2275 Km. So the average speed is roughly 487 Km.
There is an 2 hour time difference between Seoul and Da Nang
