The best month to fly with Flight IW1811 is May and the most expensive month to fly is August. (Average prices, based on 1612 datapoints.)
The best day to arrive at Surabaya is Tuesday and it would be best to avoid Saturday, as prices are on average 34.39% higher than on Tuesday. (Average prices, based on 11752228 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 532 datapoints.)