$338 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 1/22. 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

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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
Hanoi
Hanoi2 stops$655
Da Nang
Da Nang1 stop$701
Hanoi
Hanoi2 stops$655
Da Nang
Da Nang1 stop$701

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, Mar 16 - Wed, Mar 25
Korean Air Logo
6:45 am - 9:45 pmONT-HAN
25h 00m2 stops
Korean Air Logo
11:05 pm - 10:38 pmHAN-ONT
37h 33m2 stops
$655Korean Air
Find Deal
Wed, Mar 25 - Sat, Apr 4
Korean Air Logo
6:45 am - 9:45 pmONT-HAN
25h 00m2 stops
Korean Air Logo
11:10 pm - 5:15 pmHAN-ONT
32h 05m2 stops
$676Korean Air
Find Deal
Wed, Mar 25 - Fri, Apr 3
Korean Air Logo
6:45 am - 9:45 pmONT-HAN
25h 00m2 stops
Korean Air Logo
11:10 pm - 5:15 pmHAN-ONT
32h 05m2 stops
$697Korean Air
Find Deal
Tue, May 5 - Sat, May 16
China Airlines Logo
12:10 am - 8:50 amONT-DAD
18h 40m1 stop
China Airlines Logo
9:50 am - 6:00 pmDAD-ONT
22h 10m1 stop
$701China Airlines
Find Deal
Tue, Jan 20 - Wed, Feb 4
China Airlines Logo
10:50 pm - 10:35 amONT-HAN
20h 45m1 stop
China Airlines Logo
11:35 am - 4:50 pmHAN-ONT
20h 15m1 stop
$706China Airlines
Find Deal
Thu, Jan 15 - Thu, Apr 30
China Airlines Logo
10:50 pm - 10:00 amONT-SGN
20h 10m1 stop
China Airlines Logo
10:50 am - 6:00 pmSGN-ONT
21h 10m1 stop
$712China Airlines
Find Deal
Tue, Mar 3 - Mon, Mar 23
Delta Logo
7:30 am - 11:20 pmONT-SGN
24h 50m2 stops
Delta Logo
8:00 am - 10:38 pmSGN-ONT
28h 38m2 stops
$721Delta
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Tue, Mar 3 - Wed, Mar 18
Delta Logo
7:30 am - 11:20 pmONT-SGN
24h 50m2 stops
Delta Logo
8:00 am - 5:15 pmSGN-ONT
23h 15m2 stops
$722Delta
Find Deal
Sun, Feb 1 - Fri, May 1
United Airlines Logo
6:00 am - 10:55 pmONT-SGN
49h 55m2 stops
United Airlines Logo
7:00 am - 11:06 pmSGN-ONT
30h 06m2 stops
$723United Airlines
Find Deal
Wed, Feb 11 - Tue, Mar 10
STARLUX Airlines Logo
9:45 pm - 5:15 pmONT-DAD
28h 30m1 stop
STARLUX Airlines Logo
6:25 pm - 4:50 pmDAD-ONT
36h 25m1 stop
$785STARLUX 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 November, when tickets cost $780 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $1,550 and $1,388 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 2 weeks before departure, which saves you about 12% 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$338
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from Ontario to Ho Chi Minh City

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 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 232 reviews
8.9Entertainment
9.2Crew
9.0Boarding
8.9Comfort
8.7Food
Airline reviews

Loved the boarding process. All airlines should board from the back to the front. Very efficient. Food was excellent, crew were great, seats were spacious and comfortable and the entertainment screen was the best I have seen.

10.0 ExcellentBrian, Oct 2025SIN - TPE
Read more STARLUX Airlines reviews

Loved the boarding process. All airlines should board from the back to the front. Very efficient. Food was excellent, crew were great, seats were spacious and comfortable and the entertainment screen was the best I have seen.

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.

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

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 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…

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.

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

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

Information on your arrival and departure airports