From Southeast Asia destinations:

Bangkok - Hanoi
Bangkok - Ho Chi Minh City
Singapore - Hanoi
Singapore - Ho Chi Minh City

From Oceania destinations:

Sydney - Hanoi
Sydney - Ho Chi Minh City
Melbourne - Hanoi
Melbourne -Ho Chi Minh City

From US destinations:

New York - Hanoi
New York -Ho Chi Minh City

From Canadian destinations:

Toronto - Hanoi
Toronto - Ho Chi Minh City
Vancouver - Hanoi
Vancouver - Ho Chi Minh City