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 May and the most expensive month to fly is January. (Average prices, based on 34099 datapoints.)
The best day to arrive at Kuala Lumpur is Wednesday and it would be best to avoid Sunday, as prices are on average 28.15% higher than on Wednesday. (Average prices, based on 92291 datapoints.)
The cheapest airline flying from Kuala Lumpur to Jakarta is Indonesia AirAsia. They are 61% cheaper than Garuda Indonesia. (Average prices, based on 34138 datapoints.)
The best time to fly is at around 6. (Average prices, based on 54135 datapoints.)