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 Sydney is March and the most expensive month to fly is January. (Average prices, based on 827 datapoints.)
The best day to arrive at Kuala Lumpur is Sunday and it would be best to avoid Monday, as prices are on average 37.26% higher than on Sunday. (Average prices, based on 827 datapoints.)