Vietnam Airlines from Seoul to Ho Chi Minh City has 1 flight every day. And there are 7 flights per week flying out of Seoul which connect to Ho Chi Minh City.
The price for economy class – one way ticket of Vietnam Airlines from Seoul to Ho Chi Minh City is 13.191.000 VND (or ~$658 USD) and the price for bussiness class – one way ticket of Vietnam Airline is 17.592.000 VND (or ~$878 USD).