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$333+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Mar 29 — Apr 51
Sun 3/29
Sun 4/5
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 February 27, 2026.

This Delta deal was found by Cheapflights users on 2/26. 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 8/317:00 am
ONT
-
HAN
2 stops24h 35m
Delta
Mon 9/2111:10 pm
HAN
-
ONT
2 stops37h 30m
Delta
Deal found 2/26$641
This Delta deal was found by Cheapflights users on 2/26. 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 8/306:00 am
ONT
-
HAN
2 stops25h 35m
Delta
Mon 9/2111:10 pm
HAN
-
ONT
2 stops37h 30m
Delta
Deal found 2/26$663
This Delta deal was found by Cheapflights users on 2/24. 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 4/137:00 am
ONT
-
HAN
2 stops24h 35m
Delta
Tue 4/2111:10 pm
HAN
-
ONT
2 stops38h 34m
Delta
Deal found 2/24$680
This Delta deal was found by Cheapflights users on 2/26. 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 8/297:00 am
ONT
-
HAN
2 stops24h 35m
Delta
Mon 9/2111:10 pm
HAN
-
ONT
2 stops37h 30m
Delta
Deal found 2/26$681
This Delta deal was found by Cheapflights users on 2/24. 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
-
HAN
2 stops25h 35m
Delta
Wed 4/2211:10 pm
HAN
-
ONT
2 stops37h 27m
Delta
Deal found 2/24$685
This Delta deal was found by Cheapflights users on 2/24. 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 10/57:00 am
ONT
-
SGN
2 stops25h 10m
Delta
Wed 10/217:30 am
SGN
-
ONT
2 stops23h 47m
Delta
Deal found 2/24$686
This Korean Air deal was found by Cheapflights users on 2/26. 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
-
HAN
2 stops37h 35m
Korean Air
Thu 9/312:05 pm
HAN
-
ONT
2 stops43h 11m
Korean Air
Deal found 2/26$686
This lol.travel deal was found by Cheapflights users on 2/25. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/197:00 am
ONT
-
SGN
2 stops26h 15m
Korean Air
Sun 5/311:45 pm
SGN
-
ONT
2 stops31h 30m
Korean Air
Deal found 2/25$689
This Korean Air deal was found by Cheapflights users on 2/26. 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 3/166:00 am
ONT
-
SGN
2 stops27h 20m
Multiple Airlines
Sun 5/311:45 pm
SGN
-
ONT
2 stops31h 30m
Multiple Airlines
Deal found 2/26$690
This Korean Air deal was found by Cheapflights users on 2/23. 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.
Mon 11/307:00 am
ONT
-
HAN
2 stops23h 45m
Korean Air
Sun 12/1311:05 pm
HAN
-
ONT
2 stops33h 12m
Korean Air
Deal found 2/23$690
This Korean Air deal was found by Cheapflights users on 2/24. 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 4/56:00 am
ONT
-
SGN
2 stops26h 10m
Korean Air
Sat 5/27:30 am
SGN
-
ONT
2 stops23h 45m
Korean Air
Deal found 2/24$691
This Delta deal was found by Cheapflights users on 2/26. 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 3/3011:59 am
ONT
-
SGN
2 stops58h 36m
Delta
Sun 4/2611:45 pm
SGN
-
ONT
2 stops36h 52m
Delta
Deal found 2/26$692

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 February 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$680
(Delta)

One-way from

$333
(Delta)

Popular in

June

Cheapest in

September

Average price

$767
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 February 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 February 27, 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

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Thu 3/26

6:00 am-10:25 pm

2 stops26h 25m

Ho Chi Minh City

Mon 4/13

7:30 am-5:15 pm

2 stops23h 45m

$701

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 5/12

6:45 am-11:15 pm

2 stops26h 30m

Ho Chi Minh City

Wed 5/20

7:30 am-5:10 pm

2 stops23h 40m

$701

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 4/20

6:00 am-10:05 pm

2 stops26h 05m

Ho Chi Minh City

Wed 5/20

7:00 am-5:52 pm

2 stops24h 52m

$722

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Thu 4/23

6:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

Thu 4/30

11:10 pm-5:15 pm

2 stops32h 05m

$735

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Fri 5/8

6:45 am-10:10 pm

2 stops25h 25m

Ho Chi Minh City

Sat 6/6

7:30 am-5:03 pm

2 stops23h 33m

$761

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Wed 3/18

6:00 am-11:20 pm

2 stops27h 20m

Ho Chi Minh City

Sun 4/5

11:45 pm-5:13 pm

2 stops31h 28m

$781

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Mon 5/11

6:45 am-9:05 pm

2 stops24h 20m

Da Nang

Mon 6/29

3:55 pm-5:16 pm

2 stops39h 21m

$801

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sun 3/15

6:00 am-10:25 pm

2 stops26h 25m

Ho Chi Minh City

Sun 4/5

7:30 am-5:13 pm

2 stops23h 43m

$806

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sun 5/10

6:00 am-10:05 pm

2 stops50h 05m

Ho Chi Minh City

Sun 5/24

7:00 am-10:37 pm

2 stops29h 37m

$830

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 4/20

6:00 am-12:15 am

2 stops28h 15m

Ho Chi Minh City

Mon 5/11

7:00 am-5:52 pm

2 stops24h 52m

$831

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/23

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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 $718). 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 February 27, 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
275 reviews

Boarding

8.9

Entertainment

8.8

Food

8.7

Overall

8.9

Crew

9.2

Comfort

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
275 reviews
STARLUX Airlines
8.9
Very good
275 reviews

Boarding

8.9

Entertainment

8.8

Food

8.7

Overall

8.9

Crew

9.2

Comfort

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
1,195 reviews
STARLUX Airlines
8.9
Very good
275 reviews

Boarding

8.9

Entertainment

8.8

Food

8.7

Overall

8.9

Crew

9.2

Comfort

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
808 reviews
STARLUX Airlines
8.9
Very good
275 reviews

Boarding

8.9

Entertainment

8.8

Food

8.7

Overall

8.9

Crew

9.2

Comfort

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
275 reviews

Boarding

8.9

Entertainment

8.8

Food

8.7

Overall

8.9

Crew

9.2

Comfort

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 $735, Korean Air can have you in Vietnam from Ontario in 25h 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?

    $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 $424, 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 $718). 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 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 February 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$304Average$875FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$679Average$820FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$735Average$917FlexibilityNo cancel feeOn-time76%
STARLUX AirlinesCheapest$745Average$891FlexibilityNo cancel feeOn-timeN/A

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