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$514+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Jun 3 — Jun 101
Wed 6/3
Wed 6/10
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 May 4, 2026.

This Delta deal was found by Cheapflights users on 5/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:20 am
ONT
-
SGN
2 stops25h 50m
Delta
Wed 9/97:30 am
SGN
-
ONT
2 stops29h 10m
Delta
Deal found 5/2$926
This Korean Air deal was found by Cheapflights users on 5/1. 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 8/317:00 am
ONT
-
SGN
2 stops26h 15m
Korean Air
Sun 9/1311:45 pm
SGN
-
ONT
2 stops31h 31m
Korean Air
Deal found 5/1$931
This Delta deal was found by Cheapflights users on 5/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/235:06 pm
ONT
-
SGN
2 stops40h 09m
Delta
Mon 9/77:30 am
SGN
-
ONT
2 stops29h 10m
Delta
Deal found 5/2$932
This Delta deal was found by Cheapflights users on 5/1. 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 11/2911:55 am
ONT
-
SGN
2 stops44h 25m
Delta
Mon 12/148:00 am
SGN
-
ONT
2 stops24h 17m
Delta
Deal found 5/1$933
This ScholarTrip deal was found by Cheapflights users on 5/3. 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 ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:20 am
ONT
-
SGN
2 stops25h 50m
Korean Air
Mon 8/317:30 am
SGN
-
ONT
2 stops23h 46m
Korean Air
Deal found 5/3$963
This CrystalTravel deal was found by Cheapflights users on 5/3. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1412:45 am
ONT
-
SGN
1 stop18h 55m
China Airlines
Sat 8/2910:50 am
SGN
-
ONT
1 stop21h 50m
China Airlines
Deal found 5/3$967
This CrystalTravel deal was found by Cheapflights users on 5/1. 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.
Wed 9/211:10 pm
ONT
-
SGN
1 stop27h 45m
STARLUX Airlines
Wed 9/1611:30 am
SGN
-
ONT
1 stop19h 35m
STARLUX Airlines
Deal found 5/1$973
This Booking.com deal was found by Cheapflights users on 5/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2712:45 am
ONT
-
SGN
1 stop18h 55m
Multiple Airlines
Sat 9/1911:20 am
SGN
-
ONT
1 stop20h 40m
Multiple Airlines
Deal found 5/3$974
This CrystalTravel deal was found by Cheapflights users on 4/30. 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.
Fri 5/111:10 pm
ONT
-
SGN
1 stop27h 45m
STARLUX Airlines
Mon 6/111:30 am
SGN
-
ONT
1 stop19h 35m
STARLUX Airlines
Deal found 4/30$975
This Delta deal was found by Cheapflights users on 4/29. 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 8/296:00 am
ONT
-
SGN
2 stops26h 10m
Delta
Mon 9/77:30 am
SGN
-
ONT
2 stops29h 10m
Delta
Deal found 4/29$976
This CrystalTravel deal was found by Cheapflights users on 5/3. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/111:45 pm
ONT
-
SGN
1 stop27h 10m
STARLUX Airlines
Sat 8/2211:30 am
SGN
-
ONT
1 stop20h 10m
STARLUX Airlines
Deal found 5/3$978
This Booking.com deal was found by Cheapflights users on 5/3. 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 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 stop26h 10m
Multiple Airlines
Tue 12/1511:20 am
SGN
-
ONT
1 stop20h 30m
Multiple Airlines
Deal found 5/3$979

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 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$926
(Delta)

One-way from

$514
(Philippine Airlines)

Popular in

June

Cheapest in

September

Average price

$934
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 ($218 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 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 4, 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

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Fri 10/30

7:00 am-11:20 pm

2 stops26h 20m

Ho Chi Minh City

Mon 11/30

8:00 am-11:16 am

2 stops42h 16m

$981

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Fri 10/9

6:00 am-11:15 pm

2 stops27h 15m

Ho Chi Minh City

Sat 10/24

7:30 am-5:17 pm

2 stops23h 47m

$1,026

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Wed 9/2

9:01 am-12:15 am

2 stops25h 14m

Ho Chi Minh City

Thu 9/17

7:00 am-6:11 pm

3 stops25h 11m

$1,047

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 10/18

6:00 am-1:55 pm

2 stops41h 55m

Hanoi Noibai

Fri 10/30

7:10 pm-11:42 pm

2 stops42h 32m

$1,052
Quickest round-trip

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Wed 9/30

12:10 am-10:30 am

1 stop20h 20m

Hanoi Noibai

Sat 10/10

11:30 am-6:00 pm

1 stop20h 30m

$1,057

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 10/4

12:10 am-10:30 am

1 stop20h 20m

Hanoi Noibai

Fri 10/23

5:50 pm-6:00 pm

1 stop38h 10m

$1,080

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Wed 10/14

12:10 am-10:30 am

1 stop20h 20m

Hanoi Noibai

Mon 10/19

11:30 am-6:00 pm

1 stop20h 30m

$1,080

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 10/3

7:00 am-11:15 pm

2 stops26h 15m

Ho Chi Minh City

Sat 10/31

8:00 am-5:17 pm

2 stops23h 17m

$1,081

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Tue 9/8

7:00 am-9:05 pm

2 stops24h 05m

Da Nang

Fri 9/11

10:55 pm-10:40 pm

2 stops37h 45m

$1,081

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Fri 10/16

9:39 am-10:05 pm

2 stops22h 26m

Ho Chi Minh City

Mon 12/14

7:30 am-12:20 pm

2 stops19h 50m

$1,087

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 57 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

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

The best time to book flights from Ontario to Vietnam is 45 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.

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 February is currently the most expensive (average of $1,520). 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 May 4, 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
307 reviews

Overall

8.9

Entertainment

8.8

Crew

9.2

Boarding

9.0

Food

8.6

Comfort

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
307 reviews
STARLUX Airlines
8.9
Very good
307 reviews

Overall

8.9

Entertainment

8.8

Crew

9.2

Boarding

9.0

Food

8.6

Comfort

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
1,216 reviews
STARLUX Airlines
8.9
Very good
307 reviews

Overall

8.9

Entertainment

8.8

Crew

9.2

Boarding

9.0

Food

8.6

Comfort

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
819 reviews
STARLUX Airlines
8.9
Very good
307 reviews

Overall

8.9

Entertainment

8.8

Crew

9.2

Boarding

9.0

Food

8.6

Comfort

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
530 reviews
STARLUX Airlines
8.9
Very good
307 reviews

Overall

8.9

Entertainment

8.8

Crew

9.2

Boarding

9.0

Food

8.6

Comfort

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
8,461 reviews
STARLUX Airlines
8.9
Very good
307 reviews

Overall

8.9

Entertainment

8.8

Crew

9.2

Boarding

9.0

Food

8.6

Comfort

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 $1,047, Delta can have you in Vietnam from Ontario in 25h 14m. There are 8184 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 $393 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 February is currently the most expensive (average of $1,520). 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 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$640Average$917FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$649Average$814FlexibilityNo cancel feeOn-time81%
DeltaCheapest$654Average$735FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$692Average$812FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$741Average$803FlexibilityNo cancel feeOn-timeN/A

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