Please be aware that Kuala Lumpur has multiple airports and that these results are for all airports serving the city.
The best month to fly between Kuala Lumpur and Langkawi is August and the most expensive month to fly is May. (Average prices, based on 1759 datapoints.)
The best day to arrive at Kuala Lumpur is Tuesday and it would be best to avoid Sunday, as prices are on average 259.37% higher than on Tuesday. (Average prices, based on 297 datapoints.)
The cheapest airline flying from Kuala Lumpur to Langkawi is AirAsia. They are 47% cheaper than MasWings. (Average prices, based on 1783 datapoints.)