The best month to fly between Hanoi and Kuala Lumpur is August and the most expensive month to fly is December. (Average prices, based on 1011 datapoints.)
The best day to arrive at Hanoi is Thursday and it would be best to avoid Tuesday, as prices are on average 31.85% higher than on Thursday. (Average prices, based on 1069 datapoints.)
The cheapest airline flying from Hanoi to Kuala Lumpur is AirAsia. They are 41% cheaper than Vietnam Airlines. (Average prices, based on 1016 datapoints.)