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 Solo is October and the most expensive month to fly is June. (Average prices, based on 99032 datapoints.)
The best day to arrive at Jakarta is Monday and it would be best to avoid Friday, as prices are on average 12.86% higher than on Monday. (Average prices, based on 177670 datapoints.)
The cheapest airline flying from Jakarta to Solo is Batik Air. They are 45% cheaper than Garuda Indonesia. (Average prices, based on 99042 datapoints.)
The best time to fly is at around 7. (Average prices, based on 119037 datapoints.)