Please be aware that Kuala Lumpur has multiple airports and that these results are for all airports serving the city.
The best month to fly between Kuala Lumpur and Surabaya is February and the most expensive month to fly is June. (Average prices, based on 20988 datapoints.)
The best day to arrive at Kuala Lumpur is Saturday and it would be best to avoid Friday, as prices are on average 8.31% higher than on Saturday. (Average prices, based on 19411 datapoints.)
The cheapest airline flying from Kuala Lumpur to Surabaya is Indonesia AirAsia. They are 29% cheaper than MasWings. (Average prices, based on 20997 datapoints.)
The best time to fly is at around 21. (Average prices, based on 40996 datapoints.)
