$357 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 4/21. 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, 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
Ho Chi Minh City
Ho Chi Minh City2 stops$711
Hanoi
Hanoi2 stops$710
Da Nang
Da Nang1 stop$773
Ho Chi Minh City
Ho Chi Minh City2 stops$711
Hanoi
Hanoi2 stops$710
Da Nang
Da Nang1 stop$773

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

Wed, May 6 - Sun, May 10
Delta Logo
7:00 am - 9:35 pm
ONT
-
HAN
24h 35m
2 stops
Delta Logo
11:10 pm - 5:10 pm
HAN
-
ONT
32h 00m
2 stops
$710Delta
Sun, Oct 4 - Wed, Nov 11
Delta Logo
5:05 pm - 11:15 pm
ONT
-
SGN
40h 10m
2 stops
Delta Logo
8:00 am - 10:43 pm
SGN
-
ONT
29h 43m
2 stops
$711Delta
Thu, Sep 10 - Mon, Sep 14
Korean Air Logo
7:00 am - 10:35 am
ONT
-
HAN
37h 35m
2 stops
Korean Air Logo
11:10 pm - 10:40 pm
HAN
-
ONT
37h 30m
2 stops
$716Korean Air
Wed, May 6 - Thu, May 14
Korean Air Logo
7:00 am - 10:10 pm
ONT
-
SGN
25h 10m
2 stops
Korean Air Logo
7:30 am - 5:10 pm
SGN
-
ONT
23h 40m
2 stops
$722Korean Air
Mon, Oct 5 - Fri, Nov 6
Delta Logo
6:00 am - 11:15 pm
ONT
-
SGN
27h 15m
2 stops
Delta Logo
8:00 am - 4:12 pm
SGN
-
ONT
23h 12m
2 stops
$735Delta
Fri, Aug 21 - Wed, Sep 2
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
$740Delta
Sat, Oct 3 - Thu, Nov 12
Delta Logo
1:00 pm - 11:15 pm
ONT
-
SGN
44h 15m
2 stops
Delta Logo
8:00 am - 5:17 pm
SGN
-
ONT
24h 17m
2 stops
$741Delta
Sun, Oct 4 - Sun, Nov 1
Multiple Airlines Logo
12:10 am - 9:40 am
ONT
-
SGN
19h 30m
1 stop
Multiple Airlines Logo
11:20 am - 5:50 pm
SGN
-
ONT
20h 30m
1 stop
$744Multiple Airlines
Thu, Aug 27 - Mon, Oct 5
China Airlines Logo
12:45 am - 9:40 am
ONT
-
SGN
18h 55m
1 stop
China Airlines Logo
10:50 am - 6:00 pm
SGN
-
ONT
21h 10m
1 stop
$745China Airlines
Wed, Aug 19 - Sat, Aug 29
China Airlines Logo
12:45 am - 9:40 am
ONT
-
SGN
18h 55m
1 stop
China Airlines Logo
10:50 am - 6:40 pm
SGN
-
ONT
21h 50m
1 stop
$755China 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 March, when tickets cost $736 (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 $1,381 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 24% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonMay
Cheapest flight$362
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 16% 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.

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 296 reviews
8.7Food
9.0Boarding
9.2Crew
8.9Comfort
8.8Entertainment
Airline reviews

I liked everything but I flew business class and StarLux booked another passenger and a one year old , in business class The child cried 80 percent of the flight, the flight was a long 13 hour flight. I’m 75 and I have 10 grand children, I love kids But with that said it still made it not and enjoyable flight. Ask your great flight attendance what they think of the situation, they had to deal with. Let me know what they said Respectfully, Al Eaddy

2.0 MediocreAlbert, Apr 2026
TPE - SFO
Read more STARLUX Airlines reviews

I liked everything but I flew business class and StarLux booked another passenger and a one year old , in business class The child cried 80 percent of the flight, the flight was a long 13 hour flight. I’m 75 and I have 10 grand children, I love kids But with that said it still made it not and enjoyable flight. Ask your great flight attendance what they think of the situation, they had to deal with. Let me know what they said Respectfully, Al Eaddy

Everything is smooth. Very good. Except flight arrived SFO 30min late.

more new movies and the blockbuster movies that everyone likes

Great airline. Kind staff, before m, during, and after the flight. They Directed you the whole way. Even when I arrived at my transfer destination, flight attendants guided passengers on which direction to go. I would definitely fly STARLUX again.

Got dinner and breakfast! They had mahjong game in entertainment system. Current movies. Loved the slippers, sleeping mask packet. Great experience for a long flight

Leg room was great. Friendly crew. Food is great. Crew always kept the toilet clean.

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.

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

We really enjoyed our flight to Seattle. The food was great and service was attentive.

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.

Kayak uses scammer sites to steal money from their victims.

Kayak along with airfare assay are attempting to steal my money. Charges are being pressed.

Customer service and attention to details. The food was good.

Food could be better it was okay. Entertainment seems dated it was something but in this day and age could be a lot better.

I’d have rated Asiana good except an unfortunate incident in which I felt one of your employee didn’t really help us. During the first leg of the trip, the flight from LAX to ICN, I left my backpack on the plane. When I realized, I reported to one of your employee who promised me that it’d be taken care of, that my backpack will be there at HCM city. When we arrived there, HCM people had no idea and my backpack was still at Incheon airport who denied any knowledge whatsoever. I was left in the cold and felt helpless. I was very disappointed. I’d like someone to look into this and let me know.

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.

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.

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

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

Information on your arrival and departure airports