The best month to fly between Hong Kong and Jakarta is August and the most expensive month to fly is June. (Average prices, based on 1916 datapoints.)
The best day to arrive at Hong Kong is Saturday and it would be best to avoid Wednesday, as prices are on average 52.93% higher than on Saturday. (Average prices, based on 1922 datapoints.)
The cheapest airline flying from Hong Kong to Jakarta is Indonesia AirAsia. They are 69% cheaper than Cathay Pacific. (Average prices, based on 1921 datapoints.)