Please be aware that Kuala Lumpur and Seoul has multiple airports and that these results are for all airports serving the city.
The best month to fly between Kuala Lumpur and Seoul is May and the most expensive month to fly is January. (Average prices, based on 300 datapoints.)
The best day to arrive at Kuala Lumpur is Tuesday and it would be best to avoid Sunday, as prices are on average 51.84% higher than on Tuesday. (Average prices, based on 272 datapoints.)
The cheapest airline flying from Kuala Lumpur to Seoul is AirAsia X. They are 45% cheaper than MasWings. (Average prices, based on 306 datapoints.)