$368 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 10/21. 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

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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$716
Hanoi
Hanoi1 stop$726
Da Nang
Da Nang1 stop$722
Ho Chi Minh City
Ho Chi Minh City2 stops$716
Hanoi
Hanoi1 stop$726
Da Nang
Da Nang1 stop$722

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

Mon, Oct 27 - Sun, Nov 9
Korean Air Logo
7:35 am - 11:20 pmONT-SGN
25h 45m2 stops
Korean Air Logo
11:50 pm - 10:55 pmSGN-ONT
38h 05m2 stops
$716Korean Air
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Mon, Nov 10 - Mon, Dec 8
China Airlines Logo
10:50 pm - 4:50 pmONT-SGN
27h 00m1 stop
China Airlines Logo
11:00 am - 4:50 pmSGN-ONT
20h 50m1 stop
$721China Airlines
Find Deal
Mon, Oct 27 - Mon, Nov 24
China Airlines Logo
11:50 pm - 10:00 amONT-SGN
20h 10m1 stop
China Airlines Logo
5:50 pm - 4:50 pmSGN-ONT
38h 00m1 stop
$722China Airlines
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Sun, Nov 9 - Tue, Dec 9
United Airlines Logo
6:00 am - 10:55 pmONT-SGN
25h 55m2 stops
United Airlines Logo
7:30 am - 12:17 pmSGN-ONT
19h 47m2 stops
$732United Airlines
Find Deal
Sat, Feb 14 - Sat, Mar 7
United Airlines Logo
6:37 pm - 12:15 amONT-SGN
38h 38m2 stops
United Airlines Logo
6:00 am - 9:59 amSGN-ONT
18h 59m2 stops
$736United Airlines
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Wed, Oct 29 - Sun, Nov 9
Korean Air Logo
7:35 am - 11:20 pmONT-SGN
25h 45m2 stops
Korean Air Logo
11:50 pm - 5:09 pmSGN-ONT
32h 19m2 stops
$740Korean Air
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Tue, Nov 25 - Mon, Dec 15
Delta Logo
6:45 am - 11:20 pmONT-SGN
25h 35m2 stops
Delta Logo
8:00 am - 10:47 pmSGN-ONT
29h 47m2 stops
$759Delta
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Wed, Nov 12 - Fri, Nov 21
Delta Logo
11:48 am - 9:45 pmONT-HAN
42h 57m2 stops
Delta Logo
12:20 pm - 10:55 pmHAN-ONT
25h 35m2 stops
$767Delta
Find Deal
Wed, Jan 14 - Mon, Feb 9
STARLUX Airlines Logo
9:45 pm - 4:45 pmONT-SGN
28h 00m1 stop
STARLUX Airlines Logo
11:40 am - 4:30 pmSGN-ONT
19h 50m1 stop
$781STARLUX Airlines
Find Deal
Mon, Jan 12 - Wed, Feb 11
STARLUX Airlines Logo
9:45 pm - 10:30 amONT-SGN
21h 45m1 stop
STARLUX Airlines Logo
11:40 am - 4:30 pmSGN-ONT
19h 50m1 stop
$782STARLUX Airlines
Find Deal
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 October, when tickets cost $785 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $1,564 and $1,389 respectively.

What’s the cheapest day of the week to fly from Ontario to Vietnam?

The average price of all round-trip flights from Ontario to Vietnam clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Vietnam on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from Ontario to Vietnam. For your return ticket, we recommend flying on a Thursday and avoiding Saturdays for the best deals.

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 1 week before departure. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$368
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 36% increase in price.
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.

  • What is the cheapest time of day to fly to Vietnam?

    The cheapest time of day to fly to Vietnam is generally in the morning, when round-trip flights cost $914 on average. Morning departures are around 22% cheaper than evening flights, on average. The most expensive time of day to fly to Vietnam is generally in the evening, which is peak travel time and where the average cost of a ticket is $1,167.

Reviews of the top 5 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 216 reviews
9.0Boarding
9.2Crew
8.7Food
8.9Comfort
8.8Entertainment
Airline reviews

Flight cancelled due to inclement weather yet rival airline EVA Air with the same route departed 2 hours later and landed safely while our flight was cancelled and rescheduled for 36 hours later.

2.0 MediocreTrach, Sep 2025SFO - TPE
Read more STARLUX Airlines reviews

Flight cancelled due to inclement weather yet rival airline EVA Air with the same route departed 2 hours later and landed safely while our flight was cancelled and rescheduled for 36 hours later.

The staff in air and on land went above and beyond! I would definately recommend and we will fly Starlux again!

I need Starlux to respond to my complaint and issues for my flight.

Someon vomit during boarding. My seat was next to the vomit. I asked crew member to switch seat, but they said it was a full flight. I had my baby with me. My baby got sick after the flight. He was in the hospital for 2 days.

The airplane so clean and they have a nice crew

it they come out with resent movie and good food

The crew could have been kinder and less pushy. The premium economy seats don't have enough cushion. The seats are to hard and the flight became painful and uncomfortable after an hour of flying.

Aircraft is new and toilets are spacious, but toilets are quite filthy. They should clean more often. They have a long list of drink offer but are actually not available during meal. They said they’ll come back with them and you don’t get them until after dinner which means you eat your meals without any drinks if you were to get something that they don’t have on the cart. They are strict about removing headphones during take off and landing which is new to us since the movies did not get turned off. Instead, we we’re forced to watch their commercials during that time. We probably would fly with them again but not with the cost we spent. For the record, I work in tourism and travel a lot for inspections.

Our transit in Taipei was disappointing. The ground crew could not tell us where the lounge was located, so we wasted 15 minutes trying to find it. The airline has a great review, but our experience says otherwise.

Greetings when you arrive on the plane and good bye when you leave. Very attentive flight attendants.

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

The delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

Great except for the delay in Korea. Korean Air did a great job setting up a hotel for the night. I also needed assistance with a wheelchair and they were outstanding.

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.

I absolutely loved my flight from Taipei to LAX. I was originally assigned to a different seat, however one of the stewardess noticed I was uncomfortable in my seat. She offered to move me to a more comfortable setting. Although she didn’t have to do what she did, I am more than grateful and thankful for her doing so. My longer flight felt much more comfortable, just by her taking notice. I really appreciate her.

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

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

Been flying with China Airline over years many times. Good experience with them, no issues.

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 our first time flying with China Airlines and had a very nice experience. The airline staff & crews both on the ground and air were very nice. Food on the plane was very good. Will recommend it to family and friends.

Not great, will likely try to fly another or maybe I should have upgraded my ticket? Needed Air…

I don’t think I’ll be flying them again. Tight seats, no flowing air or air nozzles that you can turn air on you, for those who could have motion sickness this would be your worst nightmare. The pilot was great and experienced (which is what you want when flying 12 hours) overall I’m thankful knowledgeable pilots!

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.

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.

The beefsteak on the lunch menu was excellent! I usually do not eat airplane food. I loved it.

Flight was too cold. I wore a regular cotton tee and it wasn’t enough. It was a night time flight so I would have thought a blanket would be provided to passengers. A 4 hour flight and no options for a meal? I flew Asiana the next day from Seoul to Manilla. Same duration, 4 hours. They give everyone a pillow and blanket and serve a meal. Why is United so cheap and holding back meals and amenities? Also, they promote too much gay stuff and DEI in their advertisements. Please be mindful of other beliefs and don’t shove your gay ideology down my throat.

It was amazing. I was not expecting the phenomenal customer service Asiana provides.

We were in business class. the angled seats in that class do not have a real window view & the placement of the controls are bad. But we knew that. But the food options were mediocre. The taste was fine, but the size was for a child. It’s just really feels like United is skimping on everything. Even when we were in the Polaris lounge they did not have diet sodas. They said they were out no Coke zero no Diet Coke, etc. I do not think the portion of nuts they serve on the plane could get any smaller. Really a minimal service and offer for what you’re paying for in business.

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

From the first moment you interact with United Airlines, you can expect nothing less but extreme frustration. The baggage handler at the bag drop seems completely unbothered by the presence of customers waiting in line. No help was extended to load the baggage whatsoever. And if any of your bags is overweight by 0.01 pound they will make you re-distribute everything in your suitcase just to play power trip. When it was time to board no help was extended to customers to locate their seats. Moreover. It was a chaotic mess at the gate when it was unclear who should board first and everyone just bunched up, trying to get on the plane. I am sure the crew was doing their best to perform their jobs while being paid their wages however it shouldn’t be that hard to smile once or twice when you’re in the business if serving customers. It is a shame for the United States of America to have a flagship carrier of such low caliber. Our flight was also delayed by about an hour and a half due to further delays prior to our inbound flight. Being someone who has travelled for both business and leisure in Asia, Europe, and South America I have never experienced such poor quality of service.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

The pilots were late and it made us 1 hour late. The meat was tough and bok choy was also tough.

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

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

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