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 2330 datapoints.)
The best day to arrive at Kuala Lumpur is Monday and it would be best to avoid Friday, as prices are on average 55.33% higher than on Monday. (Average prices, based on 2485 datapoints.)
The cheapest airline flying from Kuala Lumpur to Langkawi is AirAsia. They are 46% cheaper than MasWings. (Average prices, based on 2350 datapoints.)