Flight Phu Quoc International Airport departs from Phu Quoc Phu Quoc International Airport at 01:50 and arrives at Seoul Incheon International Airport at 09:30.
The flighttime is about 5h 40m. The distance travelled ("as the bird flies"): 2751 Km. So the average speed is roughly 485 Km.
There is an 2 hour time difference between Phu Quoc and Seoul