Please be aware that Kuala Lumpur and Jakarta has multiple airports and that these results are for all airports serving the city.
The best month to fly between Kuala Lumpur and Jakarta is February and the most expensive month to fly is June. (Average prices, based on 39093 datapoints.)
The best day to arrive at Kuala Lumpur is Wednesday and it would be best to avoid Sunday, as prices are on average 21.87% higher than on Wednesday. (Average prices, based on 108485 datapoints.)
The cheapest airline flying from Kuala Lumpur to Jakarta is AirAsia. They are 59% cheaper than Garuda Indonesia. (Average prices, based on 39132 datapoints.)
The best time to fly is at around 11. (Average prices, based on 59130 datapoints.)