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 Singapore is October and the most expensive month to fly is July. (Average prices, based on 3835 datapoints.)
The best day to arrive at Kuala Lumpur is Thursday and it would be best to avoid Monday, as prices are on average 26.33% higher than on Thursday. (Average prices, based on 114506 datapoints.)
The cheapest airline flying from Kuala Lumpur to Singapore is AirAsia. They are 56% cheaper than Singapore Airlines. (Average prices, based on 3876 datapoints.)
The best time to fly is at around 15. (Average prices, based on 11604 datapoints.)