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 Kathmandu is December and the most expensive month to fly is March. (Average prices, based on 367 datapoints.)
The best day to arrive at Kuala Lumpur is Sunday and it would be best to avoid Tuesday, as prices are on average 78.12% higher than on Sunday. (Average prices, based on 488 datapoints.)
The cheapest airline flying from Kuala Lumpur to Kathmandu is Malindo Air. They are 54% cheaper than MasWings. (Average prices, based on 371 datapoints.)