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 Banjarmasin is October and the most expensive month to fly is April. (Average prices, based on 4802 datapoints.)
The best day to arrive at Yogyakarta is Friday and it would be best to avoid Monday, as prices are on average 12.06% higher than on Friday. (Average prices, based on 4770 datapoints.)