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 Medan is August and the most expensive month to fly is December. (Average prices, based on 162029 datapoints.)
The best day to arrive at Jakarta is Tuesday and it would be best to avoid Saturday, as prices are on average 3.22% higher than on Tuesday. (Average prices, based on 195236 datapoints.)
The cheapest airline flying from Jakarta to Medan is Lion Air. They are 51% cheaper than Garuda Indonesia. (Average prices, based on 162062 datapoints.)
The best time to fly is at around 14. (Average prices, based on 182061 datapoints.)