Flight Incheon International Airport departs from Seoul Incheon International Airport at 17:55 and arrives at Ho Chi Minh City Tan Son Nhat International Airport at 21:15.
The flighttime is about 5h 20m. The distance travelled ("as the bird flies"): 2519 Km. So the average speed is roughly 472 Km.
There is an 2 hour time difference between Seoul and Ho Chi Minh City
The best day to arrive at Seoul is Wednesday and it would be best to avoid Sunday, as prices are on average 189.67% higher than on Wednesday. (Average prices, based on 195899 datapoints.)
We have a lot more statistics for flights VN 403 and between Seoul and Ho Chi Minh City.