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 February and the most expensive month to fly is March. (Average prices, based on 3563 datapoints.)
The best day to arrive at Bangkok is Tuesday and it would be best to avoid Sunday, as prices are on average 36.61% higher than on Tuesday. (Average prices, based on 2528 datapoints.)
The cheapest airline flying from Bangkok to Kuala Lumpur is AirAsia. They are 47% cheaper than Thai Airways. (Average prices, based on 3588 datapoints.)
The best time to fly is at around 7. (Average prices, based on 6956 datapoints.)