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 Pangkalan Bun is September and the most expensive month to fly is May. (Average prices, based on 2428 datapoints.)
The best day to arrive at Jakarta is Wednesday and it would be best to avoid Monday, as prices are on average 2.82% higher than on Wednesday. (Average prices, based on 3042 datapoints.)