The best month to fly between Hong Kong and Seoul is September and the most expensive month to fly is June. (Average prices, based on 310 datapoints.)
The best day to arrive at Hong Kong is Thursday and it would be best to avoid Saturday, as prices are on average 99.39% higher than on Thursday. (Average prices, based on 336 datapoints.)
The cheapest airline flying from Hong Kong to Seoul is Hong Kong Express. They are 74% cheaper than Cathay Pacific. (Average prices, based on 319 datapoints.)
The best time to fly is at around 2. (Average prices, based on 670 datapoints.)