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Vietnam

$311+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Feb 14 — Feb 211
Sat 2/14
Sat 2/21
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 January 15, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$640
(Korean Air)

One-way from

$311
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$767
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 ($250 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 January 2026
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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 January 15, 2026.

This Korean Air deal was found by Cheapflights users on 1/13. 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 3/176:00 am
ONT
-
HAN
2 stops25h 45m
Korean Air
Sat 5/911:10 pm
HAN
-
ONT
2 stops32h 06m
Korean Air
Deal found 1/13$640
This Delta deal was found by Cheapflights users on 1/12. 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 9/286:00 am
ONT
-
HAN
2 stops25h 35m
Delta
Thu 10/1511:10 pm
HAN
-
ONT
2 stops32h 07m
Delta
Deal found 1/12$685
This CrystalTravel deal was found by Cheapflights users on 1/14. 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.
Thu 10/1512:10 am
ONT
-
SGN
1 stop26h 10m
China Airlines
Fri 10/3011:00 am
SGN
-
ONT
1 stop20h 50m
China Airlines
Deal found 1/14$690
This Korean Air deal was found by Cheapflights users on 1/14. 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.
Fri 4/177:30 am
ONT
-
HAN
2 stops24h 05m
Korean Air
Sat 4/2512:00 pm
HAN
-
ONT
2 stops43h 15m
Korean Air
Deal found 1/14$690
This oojo deal was found by Cheapflights users on 1/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:10 am
ONT
-
SGN
1 stop19h 30m
China Airlines
Tue 10/610:50 am
SGN
-
ONT
1 stop21h 10m
China Airlines
Deal found 1/14$693
This Korean Air deal was found by Cheapflights users on 1/14. 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.
Sun 3/86:00 am
ONT
-
SGN
2 stops40h 50m
Korean Air
Wed 3/182:05 pm
SGN
-
ONT
2 stops46h 29m
Korean Air
Deal found 1/14$696
This Delta deal was found by Cheapflights users on 1/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/283:30 pm
ONT
-
SGN
2 stops40h 50m
Delta
Sun 2/82:05 pm
SGN
-
ONT
2 stops47h 39m
Delta
Deal found 1/14$698
This oojo deal was found by Cheapflights users on 1/13. 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 2/2510:50 pm
ONT
-
SGN
1 stop27h 00m
China Airlines
Thu 3/2611:00 am
SGN
-
ONT
1 stop20h 50m
China Airlines
Deal found 1/13$699
This Delta deal was found by Cheapflights users on 1/15. 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.
Sat 1/317:30 am
ONT
-
SGN
2 stops24h 50m
Delta
Tue 2/108:00 am
SGN
-
ONT
2 stops29h 44m
Delta
Deal found 1/15$700
This oojo deal was found by Cheapflights users on 1/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/512:10 am
ONT
-
SGN
1 stop19h 30m
China Airlines
Mon 4/275:30 pm
SGN
-
ONT
1 stop38h 30m
China Airlines
Deal found 1/14$702
This oojo deal was found by Cheapflights users on 1/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/310:50 pm
ONT
-
SGN
1 stop27h 00m
China Airlines
Tue 3/1011:00 am
SGN
-
ONT
1 stop20h 50m
China Airlines
Deal found 1/14$706
This Delta deal was found by Cheapflights users on 1/15. 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 4/126:00 am
ONT
-
DAD
2 stops25h 05m
Delta
Sun 4/1910:55 pm
DAD
-
ONT
2 stops38h 49m
Delta
Deal found 1/15$706

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 January 15, 2026.
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

Tue 4/28

7:30 am-9:35 pm

2 stops24h 05m

Hanoi Noibai

Sun 5/10

11:10 pm-5:16 pm

2 stops32h 06m

$640

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Fri 4/17

7:30 am-10:40 am

2 stops37h 10m

Hanoi Noibai

Sat 4/25

11:10 pm-5:15 pm

2 stops32h 05m

$690

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Fri 4/17

7:30 am-9:35 pm

2 stops24h 05m

Hanoi Noibai

Sun 4/26

12:00 pm-5:15 pm

2 stops43h 15m

$690

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 4/28

7:30 am-9:35 pm

2 stops24h 05m

Hanoi Noibai

Thu 5/7

11:10 pm-5:16 pm

2 stops32h 06m

$690

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 1/31

7:30 am-11:20 pm

2 stops24h 50m

Ho Chi Minh City

Tue 2/10

8:00 am-10:44 pm

2 stops29h 44m

$700

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Fri 4/10

6:00 am-12:35 pm

2 stops40h 35m

Ho Chi Minh City

Fri 5/1

7:35 am-10:37 pm

2 stops29h 02m

$706

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Wed 4/15

7:30 am-9:05 pm

2 stops23h 35m

Da Nang

Tue 4/21

10:55 pm-5:15 pm

2 stops32h 20m

$711

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

$711

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Tue 4/14

7:30 am-9:05 pm

2 stops23h 35m

Da Nang

Sat 4/25

10:55 pm-5:15 pm

2 stops32h 20m

$711

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Mon 4/27

7:30 am-9:05 pm

2 stops23h 35m

Da Nang

Tue 5/26

10:55 pm-5:16 pm

2 stops32h 21m

$711

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 60 results
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2
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6

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 $755). 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 January 15, 2026.
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
264 reviews

Crew

9.1

Entertainment

8.8

Overall

8.9

Food

8.6

Comfort

8.8

Boarding

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
STARLUX Airlines
8.9
Very good
264 reviews
STARLUX Airlines
8.9
Very good
264 reviews

Crew

9.1

Entertainment

8.8

Overall

8.9

Food

8.6

Comfort

8.8

Boarding

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
Korean Air
8.4
Very good
1,187 reviews
STARLUX Airlines
8.9
Very good
264 reviews

Crew

9.1

Entertainment

8.8

Overall

8.9

Food

8.6

Comfort

8.8

Boarding

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
China Airlines
8.3
Very good
798 reviews
STARLUX Airlines
8.9
Very good
264 reviews

Crew

9.1

Entertainment

8.8

Overall

8.9

Food

8.6

Comfort

8.8

Boarding

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
Asiana Airlines
8.1
Very good
502 reviews
STARLUX Airlines
8.9
Very good
264 reviews

Crew

9.1

Entertainment

8.8

Overall

8.9

Food

8.6

Comfort

8.8

Boarding

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

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 $640, Korean Air can have you in Vietnam from Ontario in 24h 05m. 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?

    $365 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?

    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 $755). 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 January 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$640Average$882FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$679Average$820FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$700Average$892FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$746Average$895FlexibilityNo cancel feeOn-timeN/A

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