$500 Find Cheap Flights from Vietnam to Ontario - Compare and Save

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 9/7. 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 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

Fri, Dec 11 - Sat, Dec 26
STARLUX Airlines Logo
11:40 am - 3:55 pm
SGN
-
ONT
19h 15m
1 stop
STARLUX Airlines Logo
9:45 pm - 10:30 am
ONT
-
SGN
21h 45m
1 stop
$868STARLUX Airlines
Mon, Dec 21 - Wed, Dec 30
STARLUX Airlines Logo
11:40 am - 3:55 pm
SGN
-
ONT
19h 15m
1 stop
STARLUX Airlines Logo
9:45 pm - 10:30 am
ONT
-
SGN
21h 45m
1 stop
$869STARLUX Airlines
Fri, Nov 13 - Mon, Nov 23
STARLUX Airlines Logo
11:40 am - 3:55 pm
SGN
-
ONT
19h 15m
1 stop
STARLUX Airlines Logo
9:45 pm - 4:45 pm
ONT
-
SGN
28h 00m
1 stop
$876STARLUX Airlines
Tue, Oct 6 - Mon, Oct 26
STARLUX Airlines Logo
6:05 pm - 5:05 pm
SGN
-
ONT
37h 00m
1 stop
STARLUX Airlines Logo
10:45 pm - 4:45 pm
ONT
-
SGN
28h 00m
1 stop
$878STARLUX Airlines
Thu, Sep 3 - Sun, Sep 13
China Airlines Logo
10:50 am - 6:40 pm
SGN
-
ONT
21h 50m
1 stop
China Airlines Logo
12:45 am - 9:40 am
ONT
-
SGN
18h 55m
1 stop
$894China Airlines
Mon, Sep 14 - Mon, Dec 14
China Airlines Logo
10:50 am - 6:40 pm
SGN
-
ONT
21h 50m
1 stop
China Airlines Logo
10:50 pm - 4:50 pm
ONT
-
SGN
27h 00m
1 stop
$897China Airlines
Sat, Oct 31 - Tue, Nov 3
China Airlines Logo
11:00 am - 5:50 pm
SGN
-
ONT
20h 50m
1 stop
China Airlines Logo
10:50 pm - 4:50 pm
ONT
-
SGN
27h 00m
1 stop
$937China Airlines
Fri, Sep 4 - Tue, Sep 8
United Airlines Logo
11:35 pm - 8:01 pm
HAN
-
ONT
34h 26m
2 stops
United Airlines Logo
6:00 am - 10:15 pm
ONT
-
HAN
26h 15m
2 stops
$1,001United Airlines
Fri, Oct 16 - Fri, Oct 30
Qatar Airways Logo
7:30 pm - 6:03 pm
HAN
-
ONT
36h 33m
2 stops
Qatar Airways Logo
11:13 am - 6:55 am
ONT
-
HAN
29h 42m
2 stops
$1,229Qatar Airways
Mon, Dec 14 - Fri, Dec 25
United Airlines Logo
12:25 am - 3:27 pm
HAN
-
ONT
30h 02m
2 stops
United Airlines Logo
5:00 am - 11:05 pm
ONT
-
HAN
27h 05m
2 stops
$1,342United Airlines
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 round-trip 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 June, where tickets cost $700 on average for return flights. On the other hand, the most expensive months are March and July, where the average cost of tickets from Vietnam is $835 and $834 respectively. For one-way flights, the best month to travel is December with an average price of $429.

Good to know

Low seasonAugust
Cheapest flight$500
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 11% lower on average.
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.

  • 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.

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

    Each week there are around 1,042 direct flights from within Vietnam to Ontario. The most common day for departures is Friday, 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 350 reviews
8.7Food
8.8Entertainment
8.9Comfort
8.9Boarding
9.2Crew
Airline reviews

Was not able to buy wifi on the plane given, not available for economy tickets. Was not clear when buying the ticket that this was the case.

8.0 Excellentjoseph, Jun 2026
TPE - SFO
Read more STARLUX Airlines reviews

Was not able to buy wifi on the plane given, not available for economy tickets. Was not clear when buying the ticket that this was the case.

The overall experience with STARLUX was phenomenal. One of the best highlights for me was the smooth landing in LA(smoothest landing I’ve experienced ever) and the attentiveness of all your staff from check-in to boarding. Also, flight left and landed between airports on time. I highly recommend Starlux to my family and friends and I’m excited to fly with you again.

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.

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

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.

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.

The crew are amazing. Very professional, polite, kind, and accommodating.

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.

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.

The flight who provided services on my row had some not-nice attitude and not smiling at all.

Comfort was left wanting due to such a long flight, made the wife and I wish we could upgrade the seats to Business class or First Class, but did not have that option. Food was good but had very limited options and I have a dietary restriction which was difficult for the staff to accommodate since everything provided came with cheese on it. (Cheese could potentially kill me) Did not have an option to inform the staff until we were already in the air about the restriction and was not provided another option before flight departed.

The plane was uncomfortable. I paid extra for more legroom but the seat was still uncomfortable. Other seats on the same exact row didn’t have to pay extra but still have extra legroom. I didn’t understand why I needed to pay $170 for. It was Iike China airline just wants to make money off their passengers. It was unfair.

Baggage made it successfully to destination despite short layover. Appreciate that.

Staff were good and nice. There should me 3 meals instead of only 2 and snacks.

Excellent staff made the boarding process fast and easy. Friendly crews on both flights from Saigon to Taipei and Taipei to Los Angeles. Will fly China Airlines again.

this is a great airline to fly on. I have not ever had a bad experiance with China Air.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario