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 Tarakan is March and the most expensive month to fly is May. (Average prices, based on 726 datapoints.)
The best day to arrive at Jakarta is Tuesday and it would be best to avoid Thursday, as prices are on average 24.1% higher than on Tuesday. (Average prices, based on 729 datapoints.)