Please be aware that Jakarta and Kuala Lumpur has multiple airports and that these results are for all airports serving the city.
The best month to fly between Jakarta and Kuala Lumpur is November and the most expensive month to fly is June. (Average prices, based on 437277 datapoints.)
The best day to arrive at Jakarta is Tuesday and it would be best to avoid Friday, as prices are on average 15.6% higher than on Tuesday. (Average prices, based on 423330 datapoints.)
The cheapest airline flying from Jakarta to Kuala Lumpur is AirAsia. They are 57% cheaper than Garuda Indonesia. (Average prices, based on 437307 datapoints.)
The best time to fly is at around 20. (Average prices, based on 457306 datapoints.)