Please be aware that Bangkok has multiple airports and that these results are for all airports serving the city.
The best month to fly between Bangkok and Ho Chi Minh City is April and the most expensive month to fly is May. (Average prices, based on 204 datapoints.)
The best day to arrive at Bangkok is Thursday and it would be best to avoid Friday, as prices are on average 61.96% higher than on Thursday. (Average prices, based on 446 datapoints.)
The cheapest airline flying from Bangkok to Ho Chi Minh City is Thai AirAsia. They are 63% cheaper than Thai Airways. (Average prices, based on 213 datapoints.)
The best time to fly is at around 13. (Average prices, based on 416 datapoints.)