Flight Incheon International Airport departs from Seoul Incheon International Airport at 08:30 and arrives at Kalibo Kalibo International Airport at 12:00.
The flighttime is about 4h 30m. The distance travelled ("as the bird flies"): 1670 Km. So the average speed is roughly 371 Km.
There is an 1 hour time difference between Seoul and Kalibo
