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$298+ 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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Feb 24 — Mar 31
Tue 2/24
Tue 3/3
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 January 25, 2026.

This Korean Air deal was found by Cheapflights users on 1/23. 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 4/287:00 am
ONT
-
HAN
2 stops24h 35m
Korean Air
Sun 5/1011:10 pm
HAN
-
ONT
2 stops32h 06m
Korean Air
Deal found 1/23$640
This Korean Air deal was found by Cheapflights users on 1/23. 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 4/287:30 am
ONT
-
HAN
2 stops24h 05m
Korean Air
Thu 5/711:10 pm
HAN
-
ONT
2 stops32h 06m
Korean Air
Deal found 1/23$690
This American Airlines deal was found by Cheapflights users on 1/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/911:59 pm
ONT
-
HAN
2 stops31h 51m
American Airlines
Wed 9/1611:20 pm
HAN
-
ONT
2 stops38h 57m
American Airlines
Deal found 1/25$692
This oojo deal was found by Cheapflights users on 1/23. 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.
Thu 4/2312:10 am
ONT
-
SGN
1 stop19h 30m
China Airlines
Thu 5/75:30 pm
SGN
-
ONT
1 stop38h 30m
China Airlines
Deal found 1/23$699
This oojo deal was found by Cheapflights users on 1/23. 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 3/2912:10 am
ONT
-
SGN
1 stop19h 30m
China Airlines
Tue 4/1410:50 am
SGN
-
ONT
1 stop21h 10m
China Airlines
Deal found 1/23$701
This oojo deal was found by Cheapflights users on 1/23. 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.
Mon 4/1312:10 am
ONT
-
SGN
1 stop26h 10m
China Airlines
Tue 4/215:30 pm
SGN
-
ONT
1 stop38h 30m
China Airlines
Deal found 1/23$702
This oojo deal was found by Cheapflights users on 1/23. 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.
Fri 10/3011:50 pm
ONT
-
SGN
1 stop27h 00m
China Airlines
Mon 11/305:50 pm
SGN
-
ONT
1 stop38h 00m
China Airlines
Deal found 1/23$703
This oojo deal was found by Cheapflights users on 1/23. 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 3/1011:50 pm
ONT
-
SGN
1 stop27h 00m
China Airlines
Tue 3/2411:00 am
SGN
-
ONT
1 stop20h 50m
China Airlines
Deal found 1/23$704
This Korean Air deal was found by Cheapflights users on 1/25. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/136:00 am
ONT
-
SGN
2 stops27h 20m
Korean Air
Thu 4/97:35 am
SGN
-
ONT
2 stops23h 38m
Korean Air
Deal found 1/25$705
This Korean Air deal was found by Cheapflights users on 1/23. 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 5/157:00 am
ONT
-
SGN
2 stops26h 15m
Korean Air
Tue 6/27:35 am
SGN
-
ONT
2 stops23h 41m
Korean Air
Deal found 1/23$706
This SmartFares deal was found by Cheapflights users on 1/25. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/512:10 am
ONT
-
SGN
1 stop19h 30m
China Airlines
Tue 12/111:00 am
SGN
-
ONT
1 stop20h 50m
China Airlines
Deal found 1/25$707
This FlightHub deal was found by Cheapflights users on 1/22. 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 9/1812:10 am
ONT
-
SGN
1 stop26h 10m
China Airlines
Sat 10/2410:50 am
SGN
-
ONT
1 stop21h 10m
China Airlines
Deal found 1/22$708

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 January 25, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$640
(Korean Air)

One-way from

$298
(SmartFares)

Popular in

June

Cheapest in

September

Average price

$769
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 ($246 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 January 2026
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 January 25, 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

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Sun 5/10

11:10 pm-5:16 pm

2 stops32h 06m

$640

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 4/28

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Sat 5/9

11:10 pm-5:16 pm

2 stops32h 06m

$640

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

Fri 3/13

6:00 am-11:20 pm

2 stops27h 20m

Ho Chi Minh City

Thu 4/9

7:35 am-5:13 pm

2 stops23h 38m

$705

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Fri 5/15

7:00 am-10:05 pm

2 stops25h 05m

Ho Chi Minh City

Mon 6/1

7:35 am-5:16 pm

2 stops23h 41m

$706

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 2/14

6:00 am-12:50 pm

2 stops39h 50m

Ho Chi Minh City

Sat 3/14

2:05 pm-10:34 pm

2 stops46h 29m

$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

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 2/28

3:30 pm-11:20 pm

2 stops40h 50m

Ho Chi Minh City

Wed 4/29

7:35 am-5:15 pm

2 stops23h 40m

$713

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 4/28

12:10 am-4:50 pm

1 stop26h 40m

Hanoi Noibai

Sat 5/9

11:30 am-6:00 pm

1 stop20h 30m

$724

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Mon 5/11

12:10 am-4:50 pm

1 stop26h 40m

Hanoi Noibai

Wed 5/27

5:50 pm-6:00 pm

1 stop38h 10m

$724

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

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 $752). 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 25, 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
268 reviews

Overall

8.9

Boarding

8.9

Entertainment

8.8

Crew

9.1

Comfort

8.8

Food

8.6

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
268 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Overall

8.9

Boarding

8.9

Entertainment

8.8

Crew

9.1

Comfort

8.8

Food

8.6

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
1,188 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Overall

8.9

Boarding

8.9

Entertainment

8.8

Crew

9.1

Comfort

8.8

Food

8.6

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
802 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Overall

8.9

Boarding

8.9

Entertainment

8.8

Crew

9.1

Comfort

8.8

Food

8.6

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.
Cathay Pacific
7.6
Good
1,144 reviews
STARLUX Airlines
8.9
Very good
268 reviews

Overall

8.9

Boarding

8.9

Entertainment

8.8

Crew

9.1

Comfort

8.8

Food

8.6

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 35m. 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 $399 and $422, 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 - Da Nang or Ontario - Hanoi Noibai.

  • 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 $752). 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 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$304Average$886FlexibilityNo cancel feeOn-time70%
Cathay PacificCheapest$628Average$811FlexibilityNo cancel feeOn-time72%
Korean AirCheapest$679Average$820FlexibilityNo cancel feeOn-time81%
STARLUX AirlinesCheapest$745Average$887FlexibilityNo cancel feeOn-timeN/A

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