Please be aware that Kuala Lumpur and Istanbul has multiple airports and that these results are for all airports serving the city.
The best month to fly between Kuala Lumpur and Istanbul is December and the most expensive month to fly is July. (Average prices, based on 268 datapoints.)
The best day to arrive at Kuala Lumpur is Saturday and it would be best to avoid Sunday, as prices are on average 38.41% higher than on Saturday. (Average prices, based on 227 datapoints.)