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 685593 datapoints.)
The best day to arrive at Jakarta is Tuesday and it would be best to avoid Friday, as prices are on average 11.03% higher than on Tuesday. (Average prices, based on 299668 datapoints.)
The cheapest airline flying from Jakarta to Surabaya is Lion Air. They are 41% cheaper than Garuda Indonesia. (Average prices, based on 685634 datapoints.)
The best time to fly is at around 3. (Average prices, based on 705633 datapoints.)