There are multiple carriages operating flights from Toronto to Ho Chi Minh City and vice versa. The most popular stop on this route is Hong Kong, as it often involves only one stop along the way. 

United Airlines 

United Airlines operate flights from Toronto to Ho Chi Minh City, and prices start from $1200 for round trip. The disadvantage is that these flights often have two or more stops, one in the US and one in Asia. 

Sample schedule:

Depart Toronto: 12:32 PM
Arrive in Newark: 2:32 PM - layover: 53 minutes
Arrive in Hong Kong: 8:25 PM (+1 day) - layover: 2 hours
Arrive in Ho Chi Minh City: 12:02 AM (+1 day)

Total travel time: 23 h 33 m

All Nippon Airways

All Nippon Airways has flights connecting Toronto and Ho Chi Minh City, and prices start from $1205. The flights often involve connection both in the US and one in Japan, either Tokyo or Osaka. 

Sample schedule:

Depart Toronto: 8:29 AM
Arrive in Washington: 10:04 AM - layover: 1h 35m
Arrive in Tokyo: 3:25 PM (+1 day) - layover: 2 hours
Arrive in Ho Chi Minh City: 10:05 PM 

Total travel time: 23 h 33 m

All Nippon Airways 
All Nippon Airways Contact
All Nippon Airways Baggage Allowance

Air Canada

Air Canada has the most frequent schedules of flights between Toronto and Ho Chi Minh City. Sometimes it shares code with Cathay Pacific or Korean Air to make stop in Hong Kong or Seoul. The price is about $1300 for round trip ticket. 

Sample schedule:

Depart Toronto: 12:00 PM
Arrive in Tokyo: 3:10 PM (+1 day) - layover: 2h 15m 
Arrive in Ho Chi Minh City: 10:05 PM 

Total travel time: 22h 05m

Cathay Pacific

Cathay Pacific is among the most popular carriages on the routes connecting Canada and Vietnam. From Toronto to Ho Chi Minh City, there are daily flights and ticket costs between $1200 to $1800, round trip, depending on how long in advance you book. Most Cathay Pacific flights on this route depart at 1:30 AM in the morning so you have to arrive at Toronto Airport very late at night.

Sample schedule: 

Depart Toronto: 1:30 AM
Arrive in Hong Kong: 6:05 AM (+1 day) - layover: 2h 45m
Arrive in Ho Chi Minhh City: 10:25 AM

Total travel time: 20h 55m

Cathay Pacific Airways
Cathay Pacific Baggage Allowance
Cathay Pacific Meals
Cathay Pacific Contact