Please be aware that Shanghai and Jakarta has multiple airports and that these results are for all airports serving the city.
The best month to fly between Shanghai and Jakarta is February and the most expensive month to fly is June. (Average prices, based on 363 datapoints.)
The best day to arrive at Shanghai is Tuesday and it would be best to avoid Thursday, as prices are on average 69.76% higher than on Tuesday. (Average prices, based on 363 datapoints.)