Please be aware that Yogyakarta has multiple airports and that these results are for all airports serving the city.
The best month to fly between Yogyakarta and Tarakan is November and the most expensive month to fly is December. (Average prices, based on 224 datapoints.)
The best day to arrive at Yogyakarta is Wednesday and it would be best to avoid Tuesday, as prices are on average 1.93% higher than on Wednesday. (Average prices, based on 224 datapoints.)