Please be aware that Jakarta and Tokyo has multiple airports and that these results are for all airports serving the city.
The best month to fly between Jakarta and Tokyo is May and the most expensive month to fly is December. (Average prices, based on 3465 datapoints.)
The best day to arrive at Jakarta is Monday and it would be best to avoid Saturday, as prices are on average 23.09% higher than on Monday. (Average prices, based on 24347 datapoints.)
The cheapest airline flying from Jakarta to Tokyo is Garuda Indonesia. They are 41% cheaper than Japan Airlines. (Average prices, based on 3470 datapoints.)