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 Ho Chi Minh City is October and the most expensive month to fly is July. (Average prices, based on 6671 datapoints.)
The best day to arrive at Kuala Lumpur is Wednesday and it would be best to avoid Friday, as prices are on average 26.27% higher than on Wednesday. (Average prices, based on 6687 datapoints.)
The best time to fly is at around 11. (Average prices, based on 12003 datapoints.)