The best month to fly with Flight IU542 is September and the most expensive month to fly is July. (Average prices, based on 2952 datapoints.)
The best day to arrive at Surabaya is Tuesday and it would be best to avoid Friday, as prices are on average 4.65% higher than on Tuesday. (Average prices, based on 93753166 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 927 datapoints.)