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$368+ 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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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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 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/3. 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 12/36:41 pmONT - SGN
2 stops37h 14mUnited Airlines
Thu 12/256:00 amSGN - ONT
2 stops26h 51mUnited Airlines
Deal found 12/3$777
This Delta deal was found by Cheapflights users on 12/4. 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 12/296:00 amONT - SGN
2 stops26h 20mDelta
Mon 2/28:00 amSGN - ONT
2 stops29h 44mDelta
Deal found 12/4$857
This Korean Air deal was found by Cheapflights users on 12/4. 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.
Tue 12/306:38 amONT - SGN
2 stops25h 42mKorean Air
Tue 2/38:00 amSGN - ONT
2 stops20h 56mKorean Air
Deal found 12/4$862
This Delta deal was found by Cheapflights users on 12/4. 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 12/296:00 amONT - SGN
2 stops26h 20mDelta
Fri 1/238:00 amSGN - ONT
2 stops30h 58mDelta
Deal found 12/4$869
This Korean Air deal was found by Cheapflights users on 12/4. 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.
Tue 12/306:38 amONT - SGN
2 stops25h 42mKorean Air
Sun 2/18:00 amSGN - ONT
2 stops20h 56mKorean Air
Deal found 12/4$874
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/31:50 pmONT - SGN
2 stops42h 05mUnited Airlines
Sun 12/216:00 amSGN - ONT
2 stops26h 43mUnited Airlines
Deal found 12/3$882
This Delta deal was found by Cheapflights users on 12/3. 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 12/296:00 amONT - DAD
2 stops24h 30mDelta
Thu 1/223:45 pmDAD - ONT
2 stops46h 06mDelta
Deal found 12/3$885
This Delta deal was found by Cheapflights users on 12/3. 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.
Sun 12/281:15 pmONT - DAD
2 stops58h 00mDelta
Thu 1/223:45 pmDAD - ONT
2 stops47h 13mDelta
Deal found 12/3$891
This Delta deal was found by Cheapflights users on 12/4. 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 12/296:00 amONT - SGN
2 stops26h 20mDelta
Wed 1/2111:50 pmSGN - ONT
2 stops38h 01mDelta
Deal found 12/4$894
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/46:00 amONT - SGN
2 stops25h 55mUnited Airlines
Tue 12/236:00 amSGN - ONT
2 stops26h 43mUnited Airlines
Deal found 12/3$902
This FlightHub deal was found by Cheapflights users on 12/2. 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.
Tue 12/210:50 pmONT - SGN
1 stop20h 10mChina Airlines
Mon 12/85:50 pmSGN - ONT
1 stop38h 00mChina Airlines
Deal found 12/2$905
This Delta deal was found by Cheapflights users on 12/4. 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 12/306:38 amONT - SGN
2 stops25h 42mDelta
Thu 1/228:00 amSGN - ONT
2 stops29h 51mDelta
Deal found 12/4$907

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 4, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$696
(FlightHub)

One-way from

$368
(Delta)

Popular in

June

Cheapest in

September

Average price

$1,131
Provider with most accurate pricing for Los Angeles-Ho Chi Minh City flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Ho Chi Minh City flights.
Search Deals
From Ontario to Vietnam
Search Deals
One-way flight from Ontario to Vietnam
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($252 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 4, 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

Wed 5/13

12:10 am-10:35 am

1 stop20h 25m

Hanoi Noibai

Tue 5/19

11:35 am-6:00 pm

1 stop20h 25m

$704

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Mon 3/16

6:00 am-9:45 pm

2 stops25h 45m

Hanoi Noibai

Tue 4/7

11:10 pm-5:13 pm

2 stops32h 03m

$715

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 3/17

6:00 am-9:45 pm

2 stops25h 45m

Hanoi Noibai

Tue 4/7

11:10 pm-5:13 pm

2 stops32h 03m

$715

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 3/17

6:00 am-9:45 pm

2 stops25h 45m

Hanoi Noibai

Wed 4/1

12:00 pm-5:13 pm

2 stops43h 13m

$715

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Mon 3/16

6:00 am-9:45 pm

2 stops25h 45m

Hanoi Noibai

Wed 4/8

11:10 pm-5:13 pm

2 stops32h 03m

$715

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

$722

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sun 4/5

1:33 pm-9:50 pm

2 stops42h 17m

Ho Chi Minh City

Fri 5/8

7:00 am-12:20 pm

2 stops43h 20m

$723

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sun 2/1

6:00 am-10:55 pm

2 stops25h 55m

Ho Chi Minh City

Fri 5/1

7:00 am-11:06 pm

2 stops30h 06m

$723

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 4/7

6:00 am-11:15 pm

2 stops27h 15m

Ho Chi Minh City

Sat 5/9

11:45 pm-10:40 pm

2 stops36h 55m

$724

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 3/15

11:50 pm-10:20 am

1 stop20h 30m

Hanoi Noibai

Wed 4/8

11:35 am-6:00 pm

1 stop20h 25m

$725

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

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 $788). 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 December 4, 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 December 4, 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
243 reviews

Boarding

8.9

Entertainment

8.9

Food

8.7

Comfort

8.9

Crew

9.2

Overall

8.9

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
STARLUX Airlines
8.9
Very good
243 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Boarding

8.9

Entertainment

8.9

Food

8.7

Comfort

8.9

Crew

9.2

Overall

8.9

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
Korean Air
8.4
Very good
1,179 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Boarding

8.9

Entertainment

8.9

Food

8.7

Comfort

8.9

Crew

9.2

Overall

8.9

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
China Airlines
8.3
Very good
787 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Boarding

8.9

Entertainment

8.9

Food

8.7

Comfort

8.9

Crew

9.2

Overall

8.9

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
Asiana Airlines
8.2
Very good
490 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Boarding

8.9

Entertainment

8.9

Food

8.7

Comfort

8.9

Crew

9.2

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 $704, China Airlines can have you in Vietnam from Ontario in 20h 25m. There are 7664 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?

    $393 is the cheapest one-way deal found within the past few days, from China Airlines. You may also be able to find cheap deals on Korean Air and STARLUX Airlines, with prices starting from $395 and $430, 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 $788). 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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$640Average$882FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$701Average$893FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$710Average$825FlexibilityNo cancel feeOn-time81%
STARLUX AirlinesCheapest$750Average$895FlexibilityNo cancel feeOn-timeN/A

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