The best month to fly between Surabaya and Singapore is October and the most expensive month to fly is June. (Average prices, based on 506 datapoints.)
The best day to arrive at Surabaya is Saturday and it would be best to avoid Monday, as prices are on average 30.71% higher than on Saturday. (Average prices, based on 17277105 datapoints.)
The best time to fly is at around 9. (Average prices, based on 7090 datapoints.)