Flight Yangon International Airport departs from Yangon Yangon International Airport at 07:00 and arrives at Seoul Incheon International Airport at 15:00.
The flighttime is about 5h 30m. The distance travelled ("as the bird flies"): 3421 Km. So the average speed is roughly 622 Km.
There is an 2.5 hour time difference between Yangon and Seoul