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 Penang is February and the most expensive month to fly is January. (Average prices, based on 3907 datapoints.)
The best day to arrive at Kuala Lumpur is Wednesday and it would be best to avoid Friday, as prices are on average 60.99% higher than on Wednesday. (Average prices, based on 1363 datapoints.)
The cheapest airline flying from Kuala Lumpur to Penang is Malindo Air. They are 41% cheaper than MasWings. (Average prices, based on 3946 datapoints.)
The best time to fly is at around 16. (Average prices, based on 6726 datapoints.)