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 Hong Kong is October and the most expensive month to fly is December. (Average prices, based on 3077 datapoints.)
The best day to arrive at Jakarta is Tuesday and it would be best to avoid Monday, as prices are on average 11.51% higher than on Tuesday. (Average prices, based on 14237 datapoints.)
The best time to fly is at around 7. (Average prices, based on 5635 datapoints.)