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 Batam is October and the most expensive month to fly is January. (Average prices, based on 1197 datapoints.)
The best day to arrive at Kuala Lumpur is Thursday and it would be best to avoid Sunday, as prices are on average 30.02% higher than on Thursday. (Average prices, based on 1197 datapoints.)