Please be aware that Jakarta has multiple airports and that these results are for all airports serving the city.
The best month to fly between Jakarta and Singapore is November and the most expensive month to fly is June. (Average prices, based on 160717 datapoints.)
The best day to arrive at Jakarta is Saturday and it would be best to avoid Thursday, as prices are on average 13.62% higher than on Saturday. (Average prices, based on 172399 datapoints.)
The cheapest airline flying from Jakarta to Singapore is Indonesia AirAsia. They are 74% cheaper than Singapore Airlines. (Average prices, based on 160750 datapoints.)
The best time to fly is at around 16. (Average prices, based on 180746 datapoints.)