Please be aware that Bangkok and Kuala Lumpur has multiple airports and that these results are for all airports serving the city.
The best month to fly between Bangkok and Kuala Lumpur is May and the most expensive month to fly is September. (Average prices, based on 29071 datapoints.)
The best day to arrive at Bangkok is Friday and it would be best to avoid Sunday, as prices are on average 24.52% higher than on Friday. (Average prices, based on 22315 datapoints.)
The cheapest airline flying from Bangkok to Kuala Lumpur is AirAsia. They are 63% cheaper than Thai Airways. (Average prices, based on 29089 datapoints.)
The best time to fly is at around 8. (Average prices, based on 49087 datapoints.)