Please be aware that Bangkok and Jakarta has multiple airports and that these results are for all airports serving the city.
The best month to fly between Bangkok and Jakarta is September and the most expensive month to fly is June. (Average prices, based on 8507 datapoints.)
The best day to arrive at Bangkok is Wednesday and it would be best to avoid Sunday, as prices are on average 52.17% higher than on Wednesday. (Average prices, based on 8892 datapoints.)
The cheapest airline flying from Bangkok to Jakarta is Indonesia AirAsia. They are 52% cheaper than Garuda Indonesia. (Average prices, based on 8522 datapoints.)
The best time to fly is at around 2. (Average prices, based on 17290 datapoints.)