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 Kota Kinabalu is January and the most expensive month to fly is June. (Average prices, based on 3228 datapoints.)
The best day to arrive at Kuala Lumpur is Wednesday and it would be best to avoid Thursday, as prices are on average 208.19% higher than on Wednesday. (Average prices, based on 848 datapoints.)
The cheapest airline flying from Kuala Lumpur to Kota Kinabalu is Malindo Air. They are 41% cheaper than MasWings. (Average prices, based on 3261 datapoints.)
The best time to fly is at around 17. (Average prices, based on 5974 datapoints.)