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 Pekanbaru is October and the most expensive month to fly is June. (Average prices, based on 145003 datapoints.)
The best day to arrive at Jakarta is Tuesday and it would be best to avoid Sunday, as prices are on average 5.17% higher than on Tuesday. (Average prices, based on 253769 datapoints.)
The cheapest airline flying from Jakarta to Pekanbaru is Lion Air. They are 75% cheaper than Garuda Indonesia. (Average prices, based on 145013 datapoints.)
The best time to fly is at around 4. (Average prices, based on 165012 datapoints.)