Please be aware that Tokyo and Jakarta has multiple airports and that these results are for all airports serving the city.
The best month to fly between Tokyo and Jakarta is September and the most expensive month to fly is December. (Average prices, based on 4276 datapoints.)
The best day to arrive at Tokyo is Thursday and it would be best to avoid Sunday, as prices are on average 27.32% higher than on Thursday. (Average prices, based on 9051 datapoints.)
The cheapest airline flying from Tokyo to Jakarta is Garuda Indonesia. They are 62% cheaper than Japan Airlines. (Average prices, based on 4282 datapoints.)