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 Miri is November and the most expensive month to fly is June. (Average prices, based on 206 datapoints.)
The best day to arrive at Kuala Lumpur is Tuesday and it would be best to avoid Friday, as prices are on average 153.3% higher than on Tuesday. (Average prices, based on 210 datapoints.)