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 March and the most expensive month to fly is December. (Average prices, based on 360024 datapoints.)
The best day to arrive at Jakarta is Tuesday and it would be best to avoid Friday, as prices are on average 8.67% higher than on Tuesday. (Average prices, based on 266553 datapoints.)
The cheapest airline flying from Jakarta to Surabaya is Lion Air. They are 51% cheaper than Garuda Indonesia. (Average prices, based on 360053 datapoints.)
The best time to fly is at around 3. (Average prices, based on 380052 datapoints.)