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$502+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Jun 19 — Jun 261
Fri 6/19
Fri 6/26
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 May 20, 2026.

This Booking.com deal was found by Cheapflights users on 5/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:10 am
ONT
-
SGN
1 stop26h 10m
Multiple Airlines
Tue 10/1311:20 am
SGN
-
ONT
1 stop20h 40m
Multiple Airlines
Deal found 5/19$975
This Booking.com deal was found by Cheapflights users on 5/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:10 am
ONT
-
SGN
1 stop19h 30m
Multiple Airlines
Tue 12/1511:20 am
SGN
-
ONT
1 stop20h 30m
Multiple Airlines
Deal found 5/17$979
This Gotogate deal was found by Cheapflights users on 5/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/312:45 am
ONT
-
SGN
1 stop18h 55m
China Airlines
Thu 9/2410:50 am
SGN
-
ONT
1 stop21h 10m
China Airlines
Deal found 5/19$988
This Gotogate deal was found by Cheapflights users on 5/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/412:45 am
ONT
-
SGN
1 stop18h 55m
China Airlines
Wed 8/195:30 pm
SGN
-
ONT
1 stop39h 10m
China Airlines
Deal found 5/17$989
This Gotogate deal was found by Cheapflights users on 5/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/312:45 am
ONT
-
SGN
1 stop18h 55m
China Airlines
Fri 9/2510:50 am
SGN
-
ONT
1 stop21h 10m
China Airlines
Deal found 5/19$990
This Gotogate deal was found by Cheapflights users on 5/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:45 am
ONT
-
SGN
1 stop18h 55m
China Airlines
Wed 8/1910:50 am
SGN
-
ONT
1 stop21h 50m
China Airlines
Deal found 5/17$991
This Gotogate deal was found by Cheapflights users on 5/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:45 am
ONT
-
SGN
1 stop25h 35m
China Airlines
Fri 9/2510:50 am
SGN
-
ONT
1 stop21h 10m
China Airlines
Deal found 5/15$992
This Gotogate deal was found by Cheapflights users on 5/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/912:45 am
ONT
-
SGN
1 stop18h 55m
China Airlines
Sat 9/1210:50 am
SGN
-
ONT
1 stop21h 50m
China Airlines
Deal found 5/20$993
This Gotogate deal was found by Cheapflights users on 5/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:45 am
ONT
-
SGN
1 stop18h 55m
China Airlines
Wed 9/1610:50 am
SGN
-
ONT
1 stop21h 10m
China Airlines
Deal found 5/17$994
This Gotogate deal was found by Cheapflights users on 5/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:10 am
ONT
-
SGN
1 stop19h 30m
China Airlines
Tue 12/1511:00 am
SGN
-
ONT
1 stop20h 50m
China Airlines
Deal found 5/17$996
This Gotogate deal was found by Cheapflights users on 5/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:10 am
ONT
-
SGN
1 stop26h 10m
China Airlines
Mon 11/165:50 pm
SGN
-
ONT
1 stop38h 00m
China Airlines
Deal found 5/18$997
This Gotogate deal was found by Cheapflights users on 5/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:45 am
ONT
-
SGN
1 stop18h 55m
China Airlines
Fri 9/1810:50 am
SGN
-
ONT
1 stop21h 10m
China Airlines
Deal found 5/16$998

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 May 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$975
(Booking.com)

One-way from

$502
(oojo)

Popular in

June

Cheapest in

September

Average price

$941
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. 20% potential increase in price ($208 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 20, 2026.
Use the filters below to find and compare flights from Ontario to Vietnam that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sat 10/10

12:10 am-4:30 pm

1 stop26h 20m

Da Nang

Fri 10/23

5:30 pm-6:00 pm

1 stop38h 30m

$1,028

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 9/22

7:00 am-10:10 pm

2 stops25h 10m

Ho Chi Minh City

Wed 10/14

7:30 am-5:17 pm

2 stops23h 47m

$1,031

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 9/21

7:00 am-10:10 pm

2 stops25h 10m

Ho Chi Minh City

Wed 10/14

7:30 am-5:17 pm

2 stops23h 47m

$1,031

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sat 10/17

12:10 am-4:30 pm

1 stop26h 20m

Da Nang

Thu 10/22

10:00 am-6:00 pm

1 stop22h 00m

$1,075

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 10/4

12:10 am-10:30 am

1 stop20h 20m

Hanoi Noibai

Mon 11/23

11:35 am-4:50 pm

1 stop20h 15m

$1,080

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 11/1

10:50 pm-10:35 am

1 stop20h 45m

Hanoi Noibai

Thu 11/5

11:35 am-4:50 pm

1 stop20h 15m

$1,080

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Mon 10/5

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Wed 11/18

11:05 pm-5:17 pm

2 stops33h 12m

$1,097

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Thu 9/17

12:12 pm-7:15 am

2 stops29h 03m

Hanoi Noibai

Mon 10/12

7:30 pm-6:00 pm

2 stops36h 30m

$1,111

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 9/1

12:00 pm-7:15 am

2 stops29h 15m

Hanoi Noibai

Tue 9/8

7:30 pm-7:03 pm

2 stops37h 33m

$1,111

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 10/6

12:10 am-4:50 pm

1 stop26h 40m

Hanoi Noibai

Mon 11/23

11:35 am-4:50 pm

1 stop20h 15m

$1,120

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/18

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $360). Flying from Ontario to Vietnam in December is currently the most expensive (average of $928). 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.

How far ahead should I book a flight from Ontario to Vietnam?

The best time to book flights from Ontario to Vietnam is 64 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 May 20, 2026.
See what other customers who have flown with STARLUX Airlines,Korean Air, andChina 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
316 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
STARLUX Airlines
8.9
Very good
316 reviews
STARLUX Airlines
8.9
Very good
316 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
Korean Air
8.4
Very good
1,217 reviews
STARLUX Airlines
8.9
Very good
316 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
China Airlines
8.3
Very good
826 reviews
STARLUX Airlines
8.9
Very good
316 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
Asiana Airlines
8.1
Very good
534 reviews
STARLUX Airlines
8.9
Very good
316 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again
Delta
7.9
Good
8,454 reviews
STARLUX Airlines
8.9
Very good
316 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.7

Boarding

9.0

Overall

8.9

Reviews

1 / 12
10.0
Excellent

ember j,Apr 2026

TPE - ONT

Amazing how an airline can elevate service by just modernizing structures such as the massage chairs in the boarding areas to the massive airbus with the rolls Royce engines with the electrochromatic windows ! And not to mention the flawless service of the aircrew even with the language difference. I’ll definitely fly with starlux again

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 $1,126, China Airlines can have you in Vietnam from Ontario in 25h 05m. 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?

    $341 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 $378 and $427, 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 $360). Flying from Ontario to Vietnam in December is currently the most expensive (average of $928). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 May 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$640Average$917FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$649Average$772FlexibilityNo cancel feeOn-time81%
DeltaCheapest$654Average$735FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$691Average$812FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$741Average$809FlexibilityNo cancel feeOn-timeN/A

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