Flight Incheon International Airport departs from Seoul Incheon International Airport at 01:50 and arrives at Nha Trang Cam Ranh International Airport at 05:00.
The flighttime is about 5h 10m. The distance travelled ("as the bird flies"): 2289 Km. So the average speed is roughly 443 Km.
There is an 2 hour time difference between Seoul and Nha Trang
