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$390+ 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
may. 22 — may. 291
vie. 5/22
vie. 5/29
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 abril 22, 2026.

This Delta deal was found by Cheapflights users on 4/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/76:00 am
ONT
-
HAN
2 stops25h 35m
Delta
dom. 9/2011:10 pm
HAN
-
ONT
2 stops38h 34m
Delta
Deal found 4/19$761
This Korean Air deal was found by Cheapflights users on 4/20. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/177:00 am
ONT
-
HAN
2 stops23h 45m
Korean Air
lun. 11/2312:20 pm
HAN
-
ONT
2 stops43h 57m
Korean Air
Deal found 4/20$766
This Delta deal was found by Cheapflights users on 4/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/62:00 pm
ONT
-
HAN
2 stops41h 35m
Delta
mié. 9/2311:10 pm
HAN
-
ONT
2 stops37h 30m
Delta
Deal found 4/19$767
This Delta deal was found by Cheapflights users on 4/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/77:00 am
ONT
-
SGN
2 stops39h 35m
Delta
dom. 9/2011:45 pm
SGN
-
ONT
2 stops37h 59m
Delta
Deal found 4/20$786
This ScholarTrip deal was found by Cheapflights users on 4/21. 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.
lun. 5/47:00 am
ONT
-
SGN
2 stops26h 15m
Korean Air
mié. 5/61:55 pm
SGN
-
ONT
2 stops41h 15m
Korean Air
Deal found 4/21$790
This Korean Air deal was found by Cheapflights users on 4/20. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/317:00 am
ONT
-
SGN
2 stops26h 15m
Korean Air
jue. 10/17:30 am
SGN
-
ONT
2 stops23h 46m
Korean Air
Deal found 4/20$791
This Delta deal was found by Cheapflights users on 4/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 4/191:29 pm
ONT
-
SGN
2 stops43h 46m
Delta
mié. 5/207:30 am
SGN
-
ONT
2 stops23h 40m
Delta
Deal found 4/17$792
This Korean Air deal was found by Cheapflights users on 4/20. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/217:00 am
ONT
-
SGN
2 stops25h 10m
Korean Air
mar. 5/1911:45 pm
SGN
-
ONT
2 stops31h 25m
Korean Air
Deal found 4/20$793
This Delta deal was found by Cheapflights users on 4/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/116:00 am
ONT
-
HAN
2 stops38h 35m
Delta
dom. 9/2011:10 pm
HAN
-
ONT
2 stops38h 34m
Delta
Deal found 4/19$811
This Korean Air deal was found by Cheapflights users on 4/18. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/257:00 am
ONT
-
HAN
2 stops24h 45m
Korean Air
mié. 10/2812:20 pm
HAN
-
ONT
2 stops42h 57m
Korean Air
Deal found 4/18$816
This Delta deal was found by Cheapflights users on 4/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/55:05 pm
ONT
-
HAN
2 stops38h 30m
Delta
mié. 9/2311:10 pm
HAN
-
ONT
2 stops37h 30m
Delta
Deal found 4/19$817
This Delta deal was found by Cheapflights users on 4/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 4/257:00 am
ONT
-
SGN
2 stops25h 10m
Delta
mié. 5/277:30 am
SGN
-
ONT
2 stops23h 40m
Delta
Deal found 4/22$836

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 abril 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$761
(Delta)

One-way from

$390
(Korean Air)

Popular in

June

Cheapest in

September

Average price

$749
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. 19% potential increase in price ($199 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 April 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 abril 22, 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

jue. 10/15

7:00 am-12:35 pm

2 stops39h 35m

Ho Chi Minh City

jue. 10/22

7:30 am-10:43 pm

2 stops29h 13m

$786

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

mié. 9/2

7:00 am-11:15 pm

2 stops26h 15m

Ho Chi Minh City

dom. 9/20

7:30 am-10:40 pm

2 stops29h 10m

$841

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

mar. 5/5

6:00 am-10:10 pm

2 stops26h 10m

Ho Chi Minh City

lun. 5/11

7:30 am-11:34 pm

2 stops30h 04m

$841

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

vie. 9/4

7:00 am-10:10 pm

2 stops25h 10m

Ho Chi Minh City

lun. 9/21

7:30 am-5:16 pm

2 stops23h 46m

$841

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

vie. 9/4

7:00 am-10:10 pm

2 stops25h 10m

Ho Chi Minh City

dom. 9/20

7:30 am-10:40 pm

2 stops29h 10m

$891

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

lun. 4/27

7:00 am-9:05 pm

2 stops24h 05m

Da Nang

mié. 5/13

3:55 pm-5:10 pm

2 stops39h 15m

$891

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

lun. 4/27

7:00 am-9:05 pm

2 stops24h 05m

Da Nang

mar. 5/26

10:55 pm-10:34 pm

2 stops37h 39m

$996

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

mar. 5/5

6:00 am-9:05 pm

2 stops25h 05m

Da Nang

mié. 6/3

10:55 pm-5:08 pm

2 stops32h 13m

$999

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

lun. 8/31

6:00 am-9:55 pm

2 stops25h 55m

Ho Chi Minh City

mié. 9/30

7:00 am-3:22 pm

2 stops22h 22m

$1,094

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

mar. 9/8

6:00 am-9:55 pm

2 stops25h 55m

Ho Chi Minh City

mié. 10/7

7:00 am-5:51 pm

2 stops24h 51m

$1,110

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

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 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 abril 22, 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
301 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.6

Boarding

9.0

Overall

8.9

Reviews

1 / 11
8.0
Excellent

Anonymous,Apr 2026

PHX - TPE

After about 10 hours the seat turns into a 2 x4! Maybe pitch the front up 1-2 degrees so the posterior occupies the whole surface instead of sliding out forward--you would think it would be more comfortable.
STARLUX Airlines
8.9
Very good
301 reviews
STARLUX Airlines
8.9
Very good
301 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.6

Boarding

9.0

Overall

8.9

Reviews

1 / 11
8.0
Excellent

Anonymous,Apr 2026

PHX - TPE

After about 10 hours the seat turns into a 2 x4! Maybe pitch the front up 1-2 degrees so the posterior occupies the whole surface instead of sliding out forward--you would think it would be more comfortable.
Korean Air
8.4
Very good
1,212 reviews
STARLUX Airlines
8.9
Very good
301 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.6

Boarding

9.0

Overall

8.9

Reviews

1 / 11
8.0
Excellent

Anonymous,Apr 2026

PHX - TPE

After about 10 hours the seat turns into a 2 x4! Maybe pitch the front up 1-2 degrees so the posterior occupies the whole surface instead of sliding out forward--you would think it would be more comfortable.
China Airlines
8.3
Very good
818 reviews
STARLUX Airlines
8.9
Very good
301 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.6

Boarding

9.0

Overall

8.9

Reviews

1 / 11
8.0
Excellent

Anonymous,Apr 2026

PHX - TPE

After about 10 hours the seat turns into a 2 x4! Maybe pitch the front up 1-2 degrees so the posterior occupies the whole surface instead of sliding out forward--you would think it would be more comfortable.
Asiana Airlines
8.0
Very good
519 reviews
STARLUX Airlines
8.9
Very good
301 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.6

Boarding

9.0

Overall

8.9

Reviews

1 / 11
8.0
Excellent

Anonymous,Apr 2026

PHX - TPE

After about 10 hours the seat turns into a 2 x4! Maybe pitch the front up 1-2 degrees so the posterior occupies the whole surface instead of sliding out forward--you would think it would be more comfortable.
Delta
7.9
Good
8,431 reviews
STARLUX Airlines
8.9
Very good
301 reviews

Comfort

8.9

Entertainment

8.8

Crew

9.2

Food

8.6

Boarding

9.0

Overall

8.9

Reviews

1 / 11
8.0
Excellent

Anonymous,Apr 2026

PHX - TPE

After about 10 hours the seat turns into a 2 x4! Maybe pitch the front up 1-2 degrees so the posterior occupies the whole surface instead of sliding out forward--you would think it would be more comfortable.

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 $1,122, Delta can have you in Vietnam from Ontario in 20h 20m. 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?

    $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 abril 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$640Average$917FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$649Average$772FlexibilityNo cancel feeOn-time81%
DeltaCheapest$654Average$705FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$694Average$819FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$742Average$816FlexibilityNo cancel feeOn-timeN/A

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