Flight Incheon International Airport departs from Seoul Incheon International Airport at 10:35 and arrives at Jakarta Soekarno–Hatta International Airport at 15:40.
The flighttime is about 7h 05m. The distance travelled ("as the bird flies"): 2960 Km. So the average speed is roughly 418 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 333 datapoints.)
The best day to arrive at Seoul is Wednesday and it would be best to avoid Friday, as prices are on average 172.68% higher than on Wednesday. (Average prices, based on 12314939 datapoints.)
We have a lot more statistics for flights KE 5643 and between Seoul and Jakarta.