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Vietnam

$345+ 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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$710
(Delta)

One-way from

$345
(American Airlines)

Popular in

June

Cheapest in

September

Average price

$704
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. 21% potential increase in price ($245 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 15, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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 9/216:00 amONT - HAN
2 stops25h 35mDelta
Thu 10/212:00 pmHAN - ONT
2 stops25h 42mDelta
Deal found 9/15$710
This Korean Air deal was found by Cheapflights users on 9/14. 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.
Mon 9/296:00 amONT - HAN
2 stops25h 35mKorean Air
Tue 10/711:10 pmHAN - ONT
2 stops37h 31mKorean Air
Deal found 9/14$722
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 9/236:00 amONT - HAN
2 stops26h 15mUnited Airlines
Sat 10/411:35 pmHAN - ONT
2 stops31h 48mUnited Airlines
Deal found 9/15$732
This Korean Air deal was found by Cheapflights users on 9/14. 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.
Mon 9/296:00 amONT - HAN
2 stops25h 35mKorean Air
Sun 10/511:10 pmHAN - ONT
2 stops37h 31mKorean Air
Deal found 9/14$736
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/296:00 amONT - SGN
3 stops26h 55mUnited Airlines
Wed 11/126:00 amSGN - ONT
2 stops21h 37mUnited Airlines
Deal found 9/14$739
This United Airlines deal was found by Cheapflights users on 9/15. 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 12/276:39 pmONT - SGN
2 stops36h 11mUnited Airlines
Thu 1/16:00 amSGN - ONT
2 stops19h 01mUnited Airlines
Deal found 9/15$740
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/266:00 amONT - SGN
2 stops26h 55mUnited Airlines
Sun 11/166:00 amSGN - ONT
3 stops26h 34mUnited Airlines
Deal found 9/14$743
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/259:36 amONT - SGN
2 stops23h 19mUnited Airlines
Tue 11/256:00 amSGN - ONT
2 stops21h 37mUnited Airlines
Deal found 9/15$747
This Delta deal was found by Cheapflights users on 9/15. 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 9/216:00 amONT - HAN
2 stops25h 35mDelta
Fri 10/312:00 pmHAN - ONT
2 stops25h 42mDelta
Deal found 9/15$750
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/246:36 pmONT - SGN
2 stops38h 19mUnited Airlines
Sun 11/166:00 amSGN - ONT
2 stops31h 51mUnited Airlines
Deal found 9/14$753
This CrystalTravel deal was found by Cheapflights users on 9/14. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1412:45 amONT - SGN
1 stop18h 55mChina Airlines
Fri 10/3111:00 amSGN - ONT
1 stop20h 50mChina Airlines
Deal found 9/14$756
This CrystalTravel deal was found by Cheapflights users on 9/14. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1511:10 pmONT - SGN
1 stop21h 05mSTARLUX Airlines
Fri 10/3111:40 amSGN - ONT
1 stop19h 10mSTARLUX Airlines
Deal found 9/14$760

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 September 15, 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

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sun 2/22

10:50 pm-4:50 pm

1 stop27h 00m

Ho Chi Minh City

Mon 3/16

11:00 am-5:50 pm

1 stop20h 50m

$740

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 10/27

1:40 pm-10:55 pm

2 stops43h 15m

Ho Chi Minh City

Sat 11/15

6:00 am-5:34 pm

2 stops26h 34m

$747

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 11/15

6:38 pm-10:55 pm

2 stops37h 17m

Ho Chi Minh City

Tue 11/25

6:00 am-12:37 pm

2 stops21h 37m

$747

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sun 10/26

1:40 pm-10:55 pm

2 stops43h 15m

Ho Chi Minh City

Mon 11/17

6:00 am-10:51 pm

2 stops31h 51m

$747

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 10/27

6:38 pm-10:55 pm

2 stops38h 17m

Ho Chi Minh City

Thu 11/13

6:00 am-10:51 pm

2 stops31h 51m

$747

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 10/25

9:36 am-10:55 pm

2 stops23h 19m

Ho Chi Minh City

Tue 11/18

6:00 am-12:37 pm

2 stops21h 37m

$747

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sun 10/26

6:00 am-10:55 pm

2 stops26h 55m

Ho Chi Minh City

Tue 11/18

6:00 am-5:34 pm

2 stops26h 34m

$747

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 11/24

6:00 am-10:55 pm

2 stops25h 55m

Ho Chi Minh City

Sun 12/21

6:00 am-10:01 am

2 stops19h 01m

$747

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 10/13

11:10 pm-5:15 pm

1 stop28h 05m

Ho Chi Minh City

Tue 10/28

5:55 pm-4:50 pm

1 stop36h 55m

$785

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 11/15

9:45 pm-10:30 am

1 stop21h 45m

Ho Chi Minh City

Tue 11/25

5:55 pm-4:30 pm

1 stop37h 35m

$785

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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, September is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $883). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,426). 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 September 15, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Vietnam as you normally would.

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 September 15, 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
211 reviews

Entertainment

8.9

Crew

9.2

Comfort

8.9

Overall

8.9

Food

8.8

Boarding

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
8.9
Very good
211 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Entertainment

8.9

Crew

9.2

Comfort

8.9

Overall

8.9

Food

8.8

Boarding

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,139 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Entertainment

8.9

Crew

9.2

Comfort

8.9

Overall

8.9

Food

8.8

Boarding

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
767 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Entertainment

8.9

Crew

9.2

Comfort

8.9

Overall

8.9

Food

8.8

Boarding

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Asiana Airlines
8.2
Very good
479 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Entertainment

8.9

Crew

9.2

Comfort

8.9

Overall

8.9

Food

8.8

Boarding

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
United Airlines
7.4
Good
8,929 reviews
STARLUX Airlines
8.9
Very good
211 reviews

Entertainment

8.9

Crew

9.2

Comfort

8.9

Overall

8.9

Food

8.8

Boarding

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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 $710, Delta can have you in Vietnam from Ontario in 23h 10m. 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?

    $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 Korean Air and United Airlines, with prices starting from $371 and $395, 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, September is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $883). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,426). 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 5 airlines flying from Ontario to Vietnam

Discover the top 5 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$620Average$922FlexibilityNo cancel feeOn-time69%
Asiana AirlinesCheapest$640Average$793FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$714Average$1,082FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$763Average$903FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$767Average$1,101FlexibilityNo cancel feeOn-timeN/A

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