The best month to fly with Flight IW1811 is January and the most expensive month to fly is July. (Average prices, based on 479 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 11480705 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 532 datapoints.)