Based on flight volume data, Bangkok Suvarnabhumi is the most popular airport that Thai AirAsia X uses. Osaka Kansai Intl and Sydney Kingsford Smith are the next two most visited by Thai AirAsia X.
The least expensive round-trip Thai AirAsia X international flight we could find is flying from Incheon Intl to Bangkok Suvarnabhumi. This trip has 0 stops) and costs just 3,781,118 ₫ per ticket. Thai AirAsia X has international one-way flights available, but the cheapest is a flight from Shanghai Pu Dong to Bangkok Suvarnabhumi for just 1,902,302 ₫. This flight has 0 stops.
Thai AirAsia X does not have flights from Ho Chi Minh City - you will need to fly out of Bangkok Suvarnabhumi instead. However, you could fly from Ho Chi Minh City with Ethiopian Air or another airline.