The best month to fly with Flight IW1839 is January and the most expensive month to fly is May. (Average prices, based on 3192 datapoints.)
The best day to arrive at Surabaya is Tuesday and it would be best to avoid Thursday, as prices are on average 18.12% higher than on Tuesday. (Average prices, based on 2664852 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 344 datapoints.)