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 Tiruchirapalli is September and the most expensive month to fly is December. (Average prices, based on 409 datapoints.)
The best day to arrive at Kuala Lumpur is Sunday and it would be best to avoid Wednesday, as prices are on average 54.9% higher than on Sunday. (Average prices, based on 1183 datapoints.)