Vietnam

$377+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Apr 29 — May 61
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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 March 30, 2026.

This oojo deal was found by Cheapflights users on 3/27. 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 8/1412:45 am
ONT
-
SGN
1 stop25h 35m
China Airlines
Sat 9/510:50 am
SGN
-
ONT
1 stop21h 50m
China Airlines
Deal found 3/27$728
This lol.travel deal was found by Cheapflights users on 3/25. 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.
Mon 4/207:00 am
ONT
-
HAN
2 stops24h 35m
Korean Air
Wed 5/612:05 pm
HAN
-
ONT
2 stops43h 05m
Korean Air
Deal found 3/25$730
This flugladen.de deal was found by Cheapflights users on 3/26. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3111:50 pm
ONT
-
SGN
1 stop27h 00m
China Airlines
Mon 11/1611:00 am
SGN
-
ONT
1 stop20h 50m
China Airlines
Deal found 3/26$733
This flugladen.de deal was found by Cheapflights users on 3/25. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2512:10 am
ONT
-
SGN
1 stop19h 30m
China Airlines
Tue 5/125:30 pm
SGN
-
ONT
1 stop38h 30m
China Airlines
Deal found 3/25$737
This Gotogate deal was found by Cheapflights users on 3/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:10 am
ONT
-
SGN
1 stop26h 10m
China Airlines
Sat 10/310:50 am
SGN
-
ONT
1 stop21h 10m
China Airlines
Deal found 3/26$739
This Gotogate deal was found by Cheapflights users on 3/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3012:45 am
ONT
-
SGN
1 stop18h 55m
China Airlines
Mon 9/2810:50 am
SGN
-
ONT
1 stop21h 10m
China Airlines
Deal found 3/26$741
This Gotogate deal was found by Cheapflights users on 3/26. 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 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
Sat 9/510:50 am
SGN
-
ONT
1 stop21h 50m
China Airlines
Deal found 3/26$743
This oojo deal was found by Cheapflights users on 3/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:10 am
ONT
-
DAD
1 stop26h 20m
China Airlines
Thu 10/1510:00 am
DAD
-
ONT
1 stop22h 00m
China Airlines
Deal found 3/26$745
This Gotogate deal was found by Cheapflights users on 3/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:50 pm
ONT
-
SGN
1 stop20h 10m
China Airlines
Sat 11/2811:00 am
SGN
-
ONT
1 stop20h 50m
China Airlines
Deal found 3/26$750
This oojo deal was found by Cheapflights users on 3/27. 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 9/1412:45 am
ONT
-
HAN
1 stop19h 45m
China Airlines
Tue 9/2911:30 am
HAN
-
ONT
1 stop20h 30m
China Airlines
Deal found 3/27$750
This oojo deal was found by Cheapflights users on 3/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3112:45 am
ONT
-
SGN
1 stop18h 55m
China Airlines
Fri 9/185:30 pm
SGN
-
ONT
1 stop38h 30m
China Airlines
Deal found 3/26$751
This SmartFares deal was found by Cheapflights users on 3/29. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2312:45 am
ONT
-
SGN
1 stop25h 35m
China Airlines
Sun 9/610:50 am
SGN
-
ONT
1 stop21h 50m
China Airlines
Deal found 3/29$756

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 March 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$728
(oojo)

One-way from

$377
(SmartFares)

Popular in

June

Cheapest in

September

Average price

$733
Provider with most accurate pricing for Los Angeles-Ho Chi Minh City flight deals.
Provider most trusted by Cheapflights users for Los Angeles-Ho Chi Minh City flights.
From Ontario to Vietnam
One-way flight from Ontario to Vietnam
Highest demand for flights based on searches. 19% potential increase in price ($195 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
Average for round-trip flights in March 2026

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 March 30, 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

Thu 5/7

6:45 am-10:10 pm

2 stops25h 25m

Ho Chi Minh City

Sun 5/17

11:45 pm-5:10 pm

2 stops31h 25m

$791

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Fri 4/24

6:00 am-10:10 pm

2 stops26h 10m

Ho Chi Minh City

Tue 5/12

7:30 am-11:34 pm

2 stops30h 04m

$826

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 5/9

6:45 am-12:35 pm

2 stops39h 50m

Ho Chi Minh City

Sun 5/17

1:55 pm-5:10 pm

2 stops41h 15m

$831
Quickest round-trip

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 4/21

12:10 am-9:40 am

1 stop19h 30m

Ho Chi Minh City

Fri 5/8

10:50 am-6:00 pm

1 stop21h 10m

$867

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 5/9

6:45 am-12:35 pm

2 stops39h 50m

Ho Chi Minh City

Fri 5/15

1:55 pm-5:05 pm

2 stops41h 10m

$871

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 4/21

7:00 am-9:35 pm

2 stops24h 35m

Hanoi Noibai

Wed 5/6

11:10 pm-5:10 pm

2 stops32h 00m

$885

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Tue 5/5

7:00 am-2:20 pm

2 stops41h 20m

Da Nang

Mon 5/18

10:55 pm-5:10 pm

2 stops32h 15m

$891

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Wed 4/22

12:10 am-10:30 am

1 stop20h 20m

Hanoi Noibai

Wed 5/13

5:50 pm-6:00 pm

1 stop38h 10m

$896

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 5/9

6:45 am-10:10 pm

2 stops25h 25m

Ho Chi Minh City

Sun 8/23

7:30 am-10:40 pm

2 stops29h 10m

$916

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Wed 4/29

2:20 pm-11:15 pm

2 stops42h 55m

Ho Chi Minh City

Fri 5/29

1:55 pm-5:05 pm

2 stops41h 10m

$921

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

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 $304). Flying from Ontario to Vietnam in July is currently the most expensive (average of $705). 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 March 30, 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.

Entertainment

8.8

Food

8.7

Overall

9.0

Boarding

9.0

Comfort

8.9

Crew

9.2

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.

Entertainment

8.8

Food

8.7

Overall

9.0

Boarding

9.0

Comfort

8.9

Crew

9.2

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.

Entertainment

8.8

Food

8.7

Overall

9.0

Boarding

9.0

Comfort

8.9

Crew

9.2

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.

Entertainment

8.8

Food

8.7

Overall

9.0

Boarding

9.0

Comfort

8.9

Crew

9.2

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.

Entertainment

8.8

Food

8.7

Overall

9.0

Boarding

9.0

Comfort

8.9

Crew

9.2

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.

Entertainment

8.8

Food

8.7

Overall

9.0

Boarding

9.0

Comfort

8.9

Crew

9.2

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 $867, Korean Air can have you in Vietnam from Ontario in 19h 30m. 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 $396 and $424, respectively.

  • What are the most popular routes from Ontario to Vietnam?

  • 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 $705). 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

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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 March 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$649Average$772FlexibilityNo cancel feeOn-time81%
DeltaCheapest$654Average$661FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$697Average$832FlexibilityNo cancel feeOn-time70%
Asiana AirlinesCheapest$735Average$917FlexibilityNo cancel feeOn-time76%
STARLUX AirlinesCheapest$742Average$812FlexibilityNo cancel feeOn-timeN/A

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