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 Ternate is September and the most expensive month to fly is July. (Average prices, based on 5255 datapoints.)
The best day to arrive at Jakarta is Wednesday and it would be best to avoid Sunday, as prices are on average 10.84% higher than on Wednesday. (Average prices, based on 1883 datapoints.)