Please be aware that Seoul has multiple airports and that these results are for all airports serving the city.
The best month to arrive at Seoul is November and the most expensive month to fly is May. (Average prices, based on 2548 datapoints.)
The best day to arrive at Seoul is Wednesday and it would be best to avoid Saturday, as prices are on average 18.07% higher than on Wednesday. (Average prices, based on 3183 datapoints.)
The cheapest airline flying to Seoul is Hong Kong Express. They are 39% cheaper than Malindo Air. (Average prices, based on 2650 datapoints.)
At Seoul the most flights depart around 23:00. (Hourly flights, based on 2859 datapoints.)
From Seoul it is on average the cheapest to fly to Shanghai and to Osaka. (Average prices, based on 542 datapoints.)
From Seoul most of the flights depart to Beijing, second best connected from Seoul is Osaka. (Daily flights, based on 111 datapoints.)
