Flight Incheon International Airport departs from Seoul Incheon International Airport at 10:35 and arrives at Jakarta Soekarno–Hatta International Airport at 16:00.
The flighttime is about 7h 25m. The distance travelled ("as the bird flies"): 2960 Km. So the average speed is roughly 399 Km.
There is an 2 hour time difference between Seoul and Jakarta
The best month to arrive at Seoul is October and the most expensive month to fly is February. (Average prices, based on 323 datapoints.)
The best day to arrive at Seoul is Monday and it would be best to avoid Saturday, as prices are on average 31.28% higher than on Monday. (Average prices, based on 11607651 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 288 datapoints.)
We have a lot more statistics for flights GA 879 and between Seoul and Jakarta.