Please be aware that Taipei and Jakarta has multiple airports and that these results are for all airports serving the city.
The best month to fly between Taipei and Jakarta is March and the most expensive month to fly is July. (Average prices, based on 8168 datapoints.)
The best day to arrive at Taipei is Tuesday and it would be best to avoid Saturday, as prices are on average 7.21% higher than on Tuesday. (Average prices, based on 8178 datapoints.)