Vietnam

$312+ 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Jan 26 — Feb 21
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Cheap 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 December 27, 2025.

This United Airlines deal was found by Cheapflights users on 12/26. 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 12/286:39 pmONT - SGN
2 stops37h 16mUnited Airlines
Sun 2/156:00 amSGN - ONT
2 stops31h 57mUnited Airlines
Deal found 12/26$753
This United Airlines deal was found by Cheapflights users on 12/27. 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.
Wed 12/3110:42 amONT - SGN
2 stops45h 13mUnited Airlines
Mon 6/157:00 amSGN - ONT
2 stops30h 06mUnited Airlines
Deal found 12/27$847
This United Airlines deal was found by Cheapflights users on 12/26. 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.
Fri 12/266:39 pmONT - SGN
2 stops37h 16mUnited Airlines
Thu 1/156:00 amSGN - ONT
2 stops31h 53mUnited Airlines
Deal found 12/26$869
This Delta deal was found by Cheapflights users on 12/26. 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.
Tue 12/3011:42 amONT - SGN
2 stops44h 38mDelta
Tue 2/311:50 pmSGN - ONT
2 stops37h 54mDelta
Deal found 12/26$874
This United Airlines deal was found by Cheapflights users on 12/25. 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.
Thu 12/2510:42 amONT - SGN
2 stops45h 13mUnited Airlines
Sun 1/256:00 amSGN - ONT
2 stops31h 53mUnited Airlines
Deal found 12/25$919
This United Airlines deal was found by Cheapflights users on 12/25. 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.
Thu 12/2510:42 amONT - SGN
2 stops45h 13mUnited Airlines
Thu 1/156:00 amSGN - ONT
2 stops31h 53mUnited Airlines
Deal found 12/25$961
This oojo deal was found by Cheapflights users on 12/25. 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 12/3010:50 pmONT - SGN
1 stop27h 00mChina Airlines
Tue 2/35:50 pmSGN - ONT
1 stop38h 00mChina Airlines
Deal found 12/25$977
This FlightHub deal was found by Cheapflights users on 12/27. 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.
Wed 12/3110:50 pmONT - SGN
1 stop27h 00mChina Airlines
Mon 6/1510:50 amSGN - ONT
1 stop21h 10mChina Airlines
Deal found 12/27$984
This FlightHub deal was found by Cheapflights users on 12/26. 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 12/2810:50 pmONT - SGN
1 stop27h 00mChina Airlines
Thu 1/155:50 pmSGN - ONT
1 stop38h 00mChina Airlines
Deal found 12/26$1,086
This Agoda.com deal was found by Cheapflights users on 12/26. 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 Agoda.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:50 pmONT - SGN
1 stop27h 00mMultiple Airlines
Sun 2/155:50 pmSGN - ONT
1 stop37h 00mMultiple Airlines
Deal found 12/26$1,088
This FlightHub deal was found by Cheapflights users on 12/25. 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.
Fri 12/2610:50 pmONT - DAD
1 stop26h 35mChina Airlines
Sat 1/2410:20 amDAD - ONT
1 stop21h 30mChina Airlines
Deal found 12/25$1,103
This FlightHub deal was found by Cheapflights users on 12/25. 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.
Fri 12/2610:50 pmONT - DAD
1 stop26h 35mChina Airlines
Sat 1/3110:20 amDAD - ONT
1 stop21h 30mChina Airlines
Deal found 12/25$1,171

Find flight deals from Ontario to Vietnam

Keep the following information in mind while searching for Ontario to Vietnam flight deals. Data was last updated December 27, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$639
(Korean Air)

One-way from

$312
(Delta)

Popular in

June

Cheapest in

September

Average price

$1,115
Provider with most accurate pricing for Los Angeles-Ho Chi Minh City flight deals.
Provider most trusted by Cheapflights users for Los Angeles-Ho Chi Minh City flights.
From Ontario to Vietnam
One-way flight from Ontario to Vietnam
Highest demand for flights based on searches. 22% potential increase in price ($252 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Average for round-trip flights in December 2025

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 December 27, 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

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 4/12

6:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

Tue 4/28

11:10 pm-5:15 pm

2 stops32h 05m

$639

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sat 5/2

5:59 pm-9:05 pm

2 stops37h 06m

Da Nang

Wed 5/13

10:55 pm-10:40 pm

2 stops37h 45m

$710

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Wed 5/6

7:30 am-9:05 pm

2 stops23h 35m

Da Nang

Sat 5/16

3:40 pm-5:16 pm

2 stops39h 36m

$710

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Tue 3/10

6:00 am-9:30 pm

2 stops25h 30m

Da Nang

Tue 3/24

3:45 pm-5:13 pm

2 stops39h 28m

$710

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sun 4/5

6:00 am-9:05 pm

2 stops25h 05m

Da Nang

Thu 4/9

3:40 pm-5:13 pm

2 stops39h 33m

$715

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 4/18

6:00 am-12:15 am

2 stops28h 15m

Ho Chi Minh City

Mon 5/18

7:00 am-5:47 pm

2 stops24h 47m

$721

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Thu 4/16

12:10 am-4:50 pm

1 stop26h 40m

Hanoi Noibai

Mon 5/4

11:30 am-6:00 pm

1 stop20h 30m

$726

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Thu 4/16

12:10 am-4:50 pm

1 stop26h 40m

Hanoi Noibai

Sun 5/3

11:30 am-6:00 pm

1 stop20h 30m

$726

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Thu 4/16

12:10 am-9:00 am

1 stop18h 50m

Da Nang

Fri 5/8

5:30 pm-6:00 pm

1 stop38h 30m

$727

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sun 3/1

10:50 pm-4:25 pm

1 stop26h 35m

Da Nang

Sat 5/16

10:00 am-6:00 pm

1 stop22h 00m

$727

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

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 $769). 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.

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 December 27, 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.

Crew

9.1

Boarding

8.9

Entertainment

8.8

Food

8.6

Comfort

8.8

Overall

8.9

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Crew

9.1

Boarding

8.9

Entertainment

8.8

Food

8.6

Comfort

8.8

Overall

8.9

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Crew

9.1

Boarding

8.9

Entertainment

8.8

Food

8.6

Comfort

8.8

Overall

8.9

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Crew

9.1

Boarding

8.9

Entertainment

8.8

Food

8.6

Comfort

8.8

Overall

8.9

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Crew

9.1

Boarding

8.9

Entertainment

8.8

Food

8.6

Comfort

8.8

Overall

8.9

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

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 $721, Korean Air can have you in Vietnam from Ontario in 18h 50m. 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?

    $367 is the cheapest one-way deal found within the past few days, from Korean Air. You may also be able to find cheap deals on China Airlines and STARLUX Airlines, with prices starting from $393 and $430, respectively.

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

  • 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 $769). 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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Alternative routes for Ontario to Vietnam

See prices for flight routes from nearby airports that may be better suited for you.

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 December 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$640Average$882FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$700Average$889FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$710Average$821FlexibilityNo cancel feeOn-time81%
STARLUX AirlinesCheapest$746Average$907FlexibilityNo cancel feeOn-timeN/A

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