$309 Find Cheap Flights from Ontario to Vietnam

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Vietnam departing on 5/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Vietnam

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Vietnam

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Ho Chi Minh City
Ho Chi Minh City2 stops$686
Hanoi
Hanoi2 stops$635
Da Nang
Da Nang1 stop$691
Ho Chi Minh City
Ho Chi Minh City2 stops$686
Hanoi
Hanoi2 stops$635
Da Nang
Da Nang1 stop$691

Book Cheap Ontario to Vietnam Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Vietnam that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Vietnam

Sun, Aug 16 - Tue, Sep 1
Delta Logo
7:00 am - 9:35 pm
ONT
-
HAN
24h 35m
2 stops
Delta Logo
11:10 pm - 11:44 pm
HAN
-
ONT
38h 34m
2 stops
$635Delta
Sun, Mar 29 - Mon, Apr 27
Korean Air Logo
6:00 am - 10:50 am
ONT
-
HAN
38h 50m
2 stops
Korean Air Logo
11:10 pm - 5:15 pm
HAN
-
ONT
32h 05m
2 stops
$640Korean Air
Thu, Mar 19 - Fri, Apr 17
Korean Air Logo
6:00 am - 10:25 pm
ONT
-
SGN
26h 25m
2 stops
Korean Air Logo
7:30 am - 5:15 pm
SGN
-
ONT
23h 45m
2 stops
$686Korean Air
Tue, Apr 7 - Sun, May 3
China Airlines Logo
12:10 am - 9:40 am
ONT
-
SGN
19h 30m
1 stop
China Airlines Logo
10:50 am - 6:00 pm
SGN
-
ONT
21h 10m
1 stop
$688China Airlines
Sun, Apr 5 - Mon, Apr 20
China Airlines Logo
12:10 am - 9:40 am
ONT
-
SGN
19h 30m
1 stop
China Airlines Logo
5:30 pm - 6:00 pm
SGN
-
ONT
38h 30m
1 stop
$689China Airlines
Mon, Apr 6 - Thu, Apr 30
China Airlines Logo
12:10 am - 4:20 pm
ONT
-
SGN
26h 10m
1 stop
China Airlines Logo
10:50 am - 6:00 pm
SGN
-
ONT
21h 10m
1 stop
$690China Airlines
Sun, Apr 26 - Tue, May 26
China Airlines Logo
12:10 am - 4:30 pm
ONT
-
DAD
26h 20m
1 stop
China Airlines Logo
5:30 pm - 6:00 pm
DAD
-
ONT
38h 30m
1 stop
$691China Airlines
Wed, May 6 - Wed, May 27
Vietnam Airlines Logo
11:53 am - 10:20 am
ONT
-
SGN
32h 27m
2 stops
Vietnam Airlines Logo
4:30 pm - 11:12 am
SGN
-
ONT
32h 42m
2 stops
$699Vietnam Airlines
Tue, Aug 18 - Wed, Sep 16
United Airlines Logo
6:00 am - 10:15 pm
ONT
-
HAN
26h 15m
2 stops
United Airlines Logo
11:35 pm - 5:47 pm
HAN
-
ONT
32h 12m
2 stops
$722United Airlines
Wed, Apr 1 - Tue, Apr 28
STARLUX Airlines Logo
11:10 pm - 5:35 pm
ONT
-
DAD
28h 25m
1 stop
STARLUX Airlines Logo
6:45 pm - 5:05 pm
DAD
-
ONT
36h 20m
1 stop
$756STARLUX Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Vietnam flights

Get data-powered insights and trends into flights from Ontario to Vietnam to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Ontario to Vietnam?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Vietnam, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Vietnam is November, when tickets cost $773 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $1,583 and $1,384 respectively.

How far in advance should I book a flight from Ontario to Vietnam?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Vietnam, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to Vietnam, you should book around 2 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$309
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from Ontario to Hanoi

FAQs - booking Vietnam flights

  • How does KAYAK find such low prices on flights from Ontario to Vietnam?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Vietnam.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Vietnam?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to Vietnam is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Vietnam?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Ontario to Vietnam with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Vietnam?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ontario to Vietnam up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Ontario to Vietnam

 
Need help choosing which airline to fly with from Ontario to Vietnam? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.9
STARLUX AirlinesOverall score based on 274 reviews
8.9Comfort
8.7Food
8.8Entertainment
9.2Crew
8.9Boarding
Airline reviews

Excellent. Airline was very clean, staff was excellent, very professional. Economy seats were still large and comfortable. Meals were included and with good options. We were given a blanket and pillow as well as a comfort kit including an eye mask, ear plugs, and tooth brush. Would highly recommend.

10.0 ExcellentAdam, Feb 2026
SEA - TPE
Read more STARLUX Airlines reviews

Excellent. Airline was very clean, staff was excellent, very professional. Economy seats were still large and comfortable. Meals were included and with good options. We were given a blanket and pillow as well as a comfort kit including an eye mask, ear plugs, and tooth brush. Would highly recommend.

Business Class is exceptional, from the lie flat seats to the wide range of food on board. Can’t wait for our next journey with Starlux!

Th tray was dirty when pulled it out. Still oily and food stains can clearly see last trip cleaner did not clean well. The toilet sink water did not drain quickly enough.

Majority of the movie entertainment loaded in the aircraft were quite old.

Crew is very attentive. Another new airbus 350-900 plane. Very modern.

Passengers were confused and freaking out coz the flight information wasn’t showing on the board that was running with all the departing flights. B9 gate was still showing Cathay Pacific bound for HK 15:50 was on until 22:07. STARLUX staff cameater but didn’t let the passengers go in to pre departure area until 22:45 for the 23:30 boarding time

The aircraft is fairly new. The screen is big and it's great to enjoy movies on a long haul flight. However, the food quality , and drink and snack selections, have room for improvement.

Preboarding food selection is an excellent idea. On the other end I did know the choice. People in my area know the choice. It ends with I got my meal till most of them are half way to finish their meal.

Overall it’s good . However the food quality can be improved .

My luggage was forced open and broke the zipper. I received it in a huge STARLUX plastic bag. Unfortunately, I have a round trip ticket but might be my first and last with this airline

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

Flight crew was fantastic. The aircraft was meticulously cleaned at all times. The crew was continuously checking to see if the passengers were ok.

They were trying to get people to check luggage because the over head compartments were full but when we boarded there were lots of empty places that people could have put the luggage.

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

This flight was a superior flight in all regards. Extremely pleasant experience.

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Not many people, so you can lay down on two seats

Flight attendants. Food, entertainment and most of all, be on time.

Very bad. They don’t allow group people to sit together by blocking most of seats and opening only single seat during online checking in. . By doing so, they can rip off customers at the check-in counter by collecting extra money if we want to sit together in the same row.

Hour late but understandable under the conditions. Taoyuan airport could have clearer signs language wise and more staff to help direct people.

Delayed. Not a full flight and whole rows left open with the paid seating. Food was ok. My beef meal only had one cube of beef the rest carrot cubes. Entertainment on personal device but didn’t know about it until the flight was almost done.

We are glad to have used China Airlines for our trip. Continue the good service! Thank you!

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

I love my Delta crew, they were so welcoming and helpful.

Better organization of boarding procedures. Terrible leadership guiding people to gates.

I did not like how the plane landed. It was not smooth.

China Airlines crews are very excellent doing their job. Very friendly and hardworking. I will always choose China Airlines over and over. Thank you all for making my flight comfortable. God bless to all the staff. :)

It was my first time flying Asiana but i was very pleased with how professional and understanding the flight crew is with little kids. One flight attendant held my 3 year old daughter’s hand guiding her to the exit after landing while i had my hands full with luggage and my infant. She was very helpful.

The customer service was excellent. They noticed that our connecting flight was scheduled too closely for us to complete customs, so they changed the flight. Our initial flight was delayed, and they were able to get us on another flight, all without charging us any additional fees. I would fly them again anytime!

Better screens, it would have been nice to have more comfortable seats.

2nd major delay due to maintenance issues. 1st delay missed my connecting flight.

The aircraft was massive (A-380) and became crowded with 400+ passengers on board.

The plane hasnt left im stuck in seatle still my flight has been grounded for almost 5 hours

My luggage didn’t arrive with my flight. Flight was delayed by nearly 2 hours while we sat on the plane and I almost missed my connecting flight and subsequently missed the last train from the airport so it took me another 2 hours to get to my destination after arriving, Crew skipped me several times when offering beverages, and I couldn’t get their attention at times because they wouldn’t even make eye contact with me. They didn’t give me a form for disembarking so I had to go to the back of the line after waiting an eternity for immigration. Paid for on flight wi- fi that didn’t work for most of the flight.

Love flying Asiana. Been using it for over a decade now.

Coming back to America was a peaceful flight everyone and everything was perfect

The staff was courteous and the flight was very smooth. It was so nice to see the captain greeting the passengers at the end of the flights.

Everything you need to know for your flight from Ontario to Vietnam

Information on your arrival and departure airports