Based on flight volume data, Fukuoka is the most popular airport that Amakusa Airlines uses. Amakusa and Kumamoto are the next two most visited by Amakusa Airlines.
The cheapest round-trip flight with Amakusa Airlines within the country is flying Osaka Itami to Kumamoto. Expect to pay around 4,812,206 ₫ per ticket. This route tends to have 0 stops. The cheapest domestic one-way flight with Amakusa Airlines that we could find is flying from Kumamoto to Osaka Itami. This flight has 0 stops and costs about 2,065,728 ₫ per ticket.
Amakusa Airlines does not have flights from Ho Chi Minh City - you will need to fly out of Amakusa instead. However, you could fly from Ho Chi Minh City with ANA or another airline.