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$354+ Cheap flights from Ontario (ONT) to Vietnam

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Dec 10 — Dec 171
Wed 12/10
Wed 12/17
1 adult, Economy
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Cheap flight deals from Ontario to Vietnam

Keep the following information in mind while searching for Ontario to Vietnam flight deals. Data was last updated November 10, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$693
(Trip.com)

One-way from

$354
(lol.travel)

Popular in

June

Cheapest in

September

Average price

$736
Provider with most accurate pricing for Los Angeles-Ho Chi Minh City flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Ho Chi Minh City flights.
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From Ontario to Vietnam
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One-way flight from Ontario to Vietnam
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Highest demand for flights based on searches. 22% potential increase in price ($256 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Ontario to Vietnam

Cheapest flights from Ontario to Vietnam
Explore the most affordable flight options available from Ontario to Vietnam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 10, 2025.

This oojo deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1210:50 pmONT - SGN
1 stop27h 00mChina Airlines
Wed 11/1911:00 amSGN - ONT
1 stop20h 50mChina Airlines
Deal found 11/9$715
This oojo deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2610:50 pmONT - SGN
1 stop20h 10mChina Airlines
Wed 3/185:50 pmSGN - ONT
1 stop38h 00mChina Airlines
Deal found 11/9$716
This SmartFares deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:50 pmONT - HAN
1 stop20h 45mChina Airlines
Sat 12/1311:35 amHAN - ONT
1 stop20h 15mChina Airlines
Deal found 11/10$721
This Korean Air deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:40 amONT - SGN
2 stops24h 45mKorean Air
Sat 1/318:00 amSGN - ONT
2 stops20h 56mKorean Air
Deal found 11/8$722
This oojo deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1510:50 pmONT - HAN
1 stop26h 40mChina Airlines
Wed 12/2411:35 amHAN - ONT
1 stop20h 15mChina Airlines
Deal found 11/7$725
This oojo deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1110:50 pmONT - HAN
1 stop26h 40mChina Airlines
Wed 12/2411:35 amHAN - ONT
1 stop20h 15mChina Airlines
Deal found 11/7$729
This FlightHub deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:50 pmONT - SGN
1 stop20h 10mChina Airlines
Wed 4/15:30 pmSGN - ONT
1 stop38h 30mChina Airlines
Deal found 11/9$732
This FlightHub deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1610:50 pmONT - HAN
1 stop26h 40mChina Airlines
Thu 12/2511:35 amHAN - ONT
1 stop20h 15mChina Airlines
Deal found 11/7$733
This United Airlines deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/231:40 pmONT - SGN
2 stops42h 15mUnited Airlines
Sun 12/711:05 pmSGN - ONT
2 stops33h 32mUnited Airlines
Deal found 11/9$734
This United Airlines deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/86:38 pmONT - SGN
2 stops37h 17mUnited Airlines
Sat 11/157:30 amSGN - ONT
2 stops28h 14mUnited Airlines
Deal found 11/7$737
This FlightHub deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:50 pmONT - DAD
1 stop19h 20mChina Airlines
Wed 12/1710:20 amDAD - ONT
1 stop21h 30mChina Airlines
Deal found 11/10$737
This Delta deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:00 amONT - SGN
2 stops26h 20mDelta
Thu 1/298:00 amSGN - ONT
2 stops29h 29mDelta
Deal found 11/8$742

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Vietnam that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 10, 2025.
Use the filters below to find and compare flights from Ontario to Vietnam that are best for you.

Fly from

Ontario

Fly to

Vietnam

Route

Depart

Return

Price

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Thu 4/30

12:10 am-8:50 am

1 stop18h 40m

Da Nang

Sun 5/31

5:35 pm-6:00 pm

1 stop38h 25m

$698

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sun 4/26

12:10 am-4:35 pm

1 stop26h 25m

Da Nang

Tue 5/26

5:35 pm-6:00 pm

1 stop38h 25m

$698

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Fri 5/1

12:10 am-4:35 pm

1 stop26h 25m

Da Nang

Sat 5/16

9:50 am-6:00 pm

1 stop22h 10m

$698

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 1/25

10:50 pm-4:30 pm

1 stop26h 40m

Hanoi Noibai

Mon 3/30

11:35 am-6:00 pm

1 stop20h 25m

$703

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Thu 3/19

11:50 pm-9:10 am

1 stop19h 20m

Da Nang

Wed 4/15

9:50 am-6:00 pm

1 stop22h 10m

$722

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 11/30

10:50 pm-10:35 am

1 stop20h 45m

Hanoi Noibai

Sat 12/13

11:35 am-4:50 pm

1 stop20h 15m

$729

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 2/16

8:55 pm-9:50 pm

2 stops33h 55m

Ho Chi Minh City

Wed 3/18

6:00 am-12:17 pm

2 stops20h 17m

$740

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sun 3/22

6:45 am-11:20 pm

2 stops26h 35m

Ho Chi Minh City

Wed 3/25

8:00 am-5:15 pm

2 stops23h 15m

$747

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 12/1

6:00 am-10:55 pm

2 stops25h 55m

Ho Chi Minh City

Fri 1/30

6:00 am-11:18 am

2 stops20h 18m

$748

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 1/12

6:00 am-10:55 pm

2 stops25h 55m

Ho Chi Minh City

Tue 1/20

6:00 am-10:53 pm

2 stops31h 53m

$748

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Vietnam

Have a flexible travel schedule? Discover the best time to fly to Vietnam from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Ontario to Vietnam?

Currently, April is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $304). Flying from Ontario to Vietnam in July is currently the most expensive (average of $789). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to VN?

Find hourly flight availability from Ontario to Vietnam. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 10, 2025.

It’s optimal to fly from Ontario to Vietnam at noon. By choosing this option you can save up to 20% on the cost of your flight, compared to a flight in the afternoon.

Reviews of airlines servicing Vietnam

Get insights into the airlines that provide service to Vietnam. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Vietnam. Reviews last updated November 10, 2025.
See what other customers who have flown with STARLUX Airlines, Korean Air, and China Airlines from Ontario to Vietnam have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very good
222 reviews

Boarding

9.0

Food

8.7

Overall

8.9

Entertainment

8.9

Crew

9.2

Comfort

8.9

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
STARLUX Airlines
8.9
Very good
222 reviews
STARLUX Airlines
8.9
Very good
222 reviews

Boarding

9.0

Food

8.7

Overall

8.9

Entertainment

8.9

Crew

9.2

Comfort

8.9

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
Korean Air
8.4
Very good
1,162 reviews
STARLUX Airlines
8.9
Very good
222 reviews

Boarding

9.0

Food

8.7

Overall

8.9

Entertainment

8.9

Crew

9.2

Comfort

8.9

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
China Airlines
8.3
Very good
778 reviews
STARLUX Airlines
8.9
Very good
222 reviews

Boarding

9.0

Food

8.7

Overall

8.9

Entertainment

8.9

Crew

9.2

Comfort

8.9

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
Asiana Airlines
8.2
Very good
485 reviews
STARLUX Airlines
8.9
Very good
222 reviews

Boarding

9.0

Food

8.7

Overall

8.9

Entertainment

8.9

Crew

9.2

Comfort

8.9

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!

Related info for your journey

Find useful and relevant information for your journey from Ontario to Vietnam. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Vietnam?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Vietnam. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • How long is the flight from Ontario to Vietnam?

    For as low as $698, China Airlines can have you in Vietnam from Ontario in 18h 40m. There are 7844 mi between Ontario and Vietnam. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Ontario to Vietnam one-way?

    $368 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on China Airlines and STARLUX Airlines, with prices starting from $408 and $443, respectively.

  • What are the most popular routes from Ontario to Vietnam?

    The most popular route from Ontario to Vietnam is Ontario - Ho Chi Minh City. You may also consider Ontario - Hanoi Noibai or Ontario - Da Nang.

  • Can I find deals for flights from Ontario to Vietnam that include hotel bookings?

    Yes. In addition to deals on Ontario to Vietnam flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Vietnam?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Vietnam.

  • Can I find deals for business class flights from Ontario to Vietnam?

    Yes. Cheapflights offers flight deals from Ontario to Vietnam by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Vietnam?

    Currently, April is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $304). Flying from Ontario to Vietnam in July is currently the most expensive (average of $789). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 4 airlines flying from Ontario to Vietnam

Discover the top 4 airlines that operate flights from Ontario to Vietnam. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$640Average$793FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$714Average$836FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$727Average$906FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$757Average$943FlexibilityNo cancel feeOn-timeN/A

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