$445 Find Cheap Flights from Vietnam to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 9/14. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Vietnam to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Vietnam to Ontario 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 Vietnam to Ontario

Mon, Dec 1 - Mon, Dec 8
China Airlines Logo
5:50 pm - 4:50 pmSGN-ONT
38h 00m1 stop
China Airlines Logo
10:50 pm - 4:50 pmONT-SGN
27h 00m1 stop
$761China Airlines
Find Deal
Mon, Sep 8 - Mon, Nov 10
STARLUX Airlines Logo
11:30 am - 5:05 pmSGN-ONT
19h 35m1 stop
STARLUX Airlines Logo
9:45 pm - 10:30 amONT-SGN
21h 45m1 stop
$777STARLUX Airlines
Find Deal
Sat, Nov 8 - Mon, Nov 17
STARLUX Airlines Logo
11:40 am - 4:30 pmSGN-ONT
19h 50m1 stop
STARLUX Airlines Logo
9:45 pm - 10:30 amONT-SGN
21h 45m1 stop
$778STARLUX Airlines
Find Deal
Sat, Nov 8 - Tue, Nov 18
China Airlines Logo
5:50 pm - 4:50 pmSGN-ONT
38h 00m1 stop
China Airlines Logo
10:50 pm - 10:00 amONT-SGN
20h 10m1 stop
$795China Airlines
Find Deal
Wed, Oct 15 - Fri, Nov 28
United Airlines Logo
7:00 am - 5:40 pmSGN-ONT
24h 40m2 stops
United Airlines Logo
6:00 am - 9:50 pmONT-SGN
24h 50m2 stops
$891United Airlines
Find Deal
Thu, Sep 25 - Thu, Oct 30
United Airlines Logo
11:15 pm - 10:52 pmSGN-ONT
37h 37m2 stops
United Airlines Logo
6:00 am - 12:15 amONT-SGN
28h 15m2 stops
$892United Airlines
Find Deal
Wed, Feb 18 - Sun, Feb 22
Japan Airlines Logo
11:55 pm - 6:17 pmHAN-ONT
33h 22m2 stops
Japan Airlines Logo
6:00 am - 10:30 pmONT-HAN
25h 30m2 stops
$1,157Japan Airlines
Find Deal
Wed, Feb 18 - Sun, Feb 22
Japan Airlines Logo
11:55 pm - 6:17 pmHAN-ONT
33h 22m2 stops
Japan Airlines Logo
6:00 am - 10:30 pmONT-HAN
25h 30m2 stops
$1,158Japan Airlines
Find Deal
Tue, Sep 9 - Wed, Sep 17
Qatar Airways Logo
8:45 am - 6:47 pmHAN-ONT
48h 02m2 stops
Qatar Airways Logo
6:00 am - 1:55 pmONT-HAN
41h 55m2 stops
$1,446Qatar Airways
Find Deal
Mon, Sep 8 - Tue, Sep 16
Qatar Airways Logo
8:45 am - 6:54 pmHAN-ONT
48h 09m2 stops
Qatar Airways Logo
6:00 am - 2:00 pmONT-HAN
42h 00m2 stops
$1,542Qatar Airways
Find Deal
Booking Insights

KAYAK's insights & trends for flights to Ontario

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

What is the cheapest month to fly to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Ontario, 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 to Ontario is November, where tickets cost $706 on average for return flights. On the other hand, the most expensive months are January and December, where the average cost of tickets from Vietnam is $1,247 and $1,022 respectively. For one-way flights, the best month to travel is November with an average price of $706.

Good to know

Low seasonFebruary
Cheapest flight$445
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Ho Chi Minh City to Ontario

FAQs - booking Ontario flights

  • How far is Ontario Airport from central Ontario?

    There are 3 miles between Ontario city center and Ontario Airport.

  • What is the name of Ontario’s airport?

    There is only 1 airport in Ontario, called Ontario Airport (ONT). It can also be referred to as Ontario or Ontario Intl.

  • What is the cheapest day to fly to Ontario?

    Based on KAYAK data, the cheapest day to fly to Ontario is Thursday where round-trip tickets can be as cheap as $799. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are $952 on average.

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

    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 to Ontario.

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

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

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

    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 to Ontario 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 to Ontario?

    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 to Ontario 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 Ontario?

    The cheapest time of day to fly to Ontario is generally at night, when round-trip flights cost $760 on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is $850.

  • How many direct flights to Ontario are there each week?

    Each week there are around 553 direct flights from within Vietnam to Ontario. The most common day for departures is Thursday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to Ontario

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Ontario flight deals.

Reviews of the top airlines flying from Vietnam to Ontario

 
See real verified KAYAK customer reviews for airlines flying to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Vietnam to Ontario. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Ontario? 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 211 reviews
8.9Entertainment
8.8Food
8.9Comfort
9.0Boarding
9.2Crew
Airline reviews

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

6.0 GoodAnonymous, Aug 2025TPE - LAX
Read more STARLUX Airlines reviews

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.

Serve me a meal, I fell asleep during the flight. So they passed me twice.

Seats are not table comfortable. Crew members are pretty good. Can be much better!!

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.

Overall was a lovely experience. The crew were kind and courteous throughout the entire flight.

Sat next to a woman who had her period. Blood was on her seat and on the arm rest between us. I ended up having period blood on my jacket and shoes. Very gross!

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

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

Most relaxing long distance flight I have been on. And I have flown on many.

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

I would like to commend the staff from this flight. They all looked happy and I can tell they love what they are doing and constantly smiling while serving the passengers. Special mention to the guy FA in our section. I did not get his name but he is so far the best F.A I have ever encountered!

staff are super nice and effiecient! It was a very comfortable and relaxing flight

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

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