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 Surabaya is October and the most expensive month to fly is June. (Average prices, based on 288224 datapoints.)
The best day to arrive at Jakarta is Sunday and it would be best to avoid Friday, as prices are on average 11.6% higher than on Sunday. (Average prices, based on 250307 datapoints.)
The cheapest airline flying from Jakarta to Surabaya is Lion Air. They are 52% cheaper than Garuda Indonesia. (Average prices, based on 288257 datapoints.)
The best time to fly is at around 3. (Average prices, based on 308255 datapoints.)