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 Hong Kong is March and the most expensive month to fly is August. (Average prices, based on 795 datapoints.)
The best day to arrive at Kuala Lumpur is Friday and it would be best to avoid Monday, as prices are on average 82.17% higher than on Friday. (Average prices, based on 737 datapoints.)
The cheapest airline flying from Kuala Lumpur to Hong Kong is AirAsia. They are 65% cheaper than Cathay Pacific. (Average prices, based on 806 datapoints.)
The best time to fly is at around 7. (Average prices, based on 1569 datapoints.)