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 March. (Average prices, based on 23148 datapoints.)
The best day to arrive at Jakarta is Monday and it would be best to avoid Thursday, as prices are on average 12.71% higher than on Monday. (Average prices, based on 23504 datapoints.)
The best time to fly is at around 17. (Average prices, based on 38383 datapoints.)