The best month to fly with Flight IW1981 is June and the most expensive month to fly is May. (Average prices, based on 3832 datapoints.)
The best day to arrive at Surabaya is Wednesday and it would be best to avoid Friday, as prices are on average 10% higher than on Wednesday. (Average prices, based on 14037120 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 300 datapoints.)