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 Samarinda is March and the most expensive month to fly is June. (Average prices, based on 420 datapoints.)
The best day to arrive at Yogyakarta is Thursday and it would be best to avoid Sunday, as prices are on average 4.2% higher than on Thursday. (Average prices, based on 419 datapoints.)