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$378+ 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Aug 30 — Sep 61
Sun 8/30
Sun 9/6
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 July 31, 2026.

This oojo deal was found by Cheapflights users on 7/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:55 pm
ONT
-
DAD
1 stop27h 40m
STARLUX Airlines
Sun 9/136:45 pm
DAD
-
ONT
1 stop36h 20m
STARLUX Airlines
Deal found 7/29$774
This oojo deal was found by Cheapflights users on 7/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1411:55 pm
ONT
-
DAD
1 stop27h 40m
STARLUX Airlines
Thu 8/276:45 pm
DAD
-
ONT
1 stop36h 55m
STARLUX Airlines
Deal found 7/29$777
This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/411:30 pm
ONT
-
HAN
1 stop20h 40m
STARLUX Airlines
Fri 9/1811:10 am
HAN
-
ONT
1 stop19h 55m
STARLUX Airlines
Deal found 7/30$779
This oojo deal was found by Cheapflights users on 7/31. 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 10/1411:30 pm
ONT
-
HAN
1 stop20h 40m
STARLUX Airlines
Fri 10/3011:40 am
HAN
-
ONT
1 stop19h 15m
STARLUX Airlines
Deal found 7/31$781
This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1411:55 pm
ONT
-
DAD
1 stop27h 40m
STARLUX Airlines
Sun 8/236:45 pm
DAD
-
ONT
1 stop36h 55m
STARLUX Airlines
Deal found 7/29$794
This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:30 pm
ONT
-
HAN
1 stop20h 40m
STARLUX Airlines
Mon 10/511:10 am
HAN
-
ONT
1 stop19h 55m
STARLUX Airlines
Deal found 7/29$794
This Trip.com deal was found by Cheapflights users on 7/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2111:55 pm
ONT
-
HAN
1 stop20h 15m
STARLUX Airlines
Thu 9/35:50 pm
HAN
-
ONT
1 stop37h 15m
STARLUX Airlines
Deal found 7/29$795
This STARLUX Airlines deal was found by Cheapflights users on 7/30. 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 STARLUX Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2810:45 pm
ONT
-
DAD
1 stop28h 30m
STARLUX Airlines
Sun 11/16:25 pm
DAD
-
ONT
1 stop36h 30m
STARLUX Airlines
Deal found 7/30$809
This STARLUX Airlines deal was found by Cheapflights users on 7/31. 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 STARLUX Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1411:30 pm
ONT
-
HAN
1 stop27h 20m
STARLUX Airlines
Mon 9/2111:10 am
HAN
-
ONT
1 stop19h 55m
STARLUX Airlines
Deal found 7/31$814
This Kissandfly.com deal was found by Cheapflights users on 7/30. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2912:45 am
ONT
-
HAN
1 stop26h 05m
China Airlines
Tue 9/1511:30 am
HAN
-
ONT
1 stop21h 10m
China Airlines
Deal found 7/30$826
This Kissandfly.com deal was found by Cheapflights users on 7/27. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/210:50 pm
ONT
-
HAN
1 stop26h 40m
China Airlines
Mon 11/1611:35 am
HAN
-
ONT
1 stop20h 30m
China Airlines
Deal found 7/27$832
This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3012:45 am
ONT
-
DAD
1 stop25h 45m
China Airlines
Wed 9/910:00 am
DAD
-
ONT
1 stop22h 40m
China Airlines
Deal found 7/30$838

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 July 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$774
(oojo)

One-way from

$378
(oojo)

Popular in

December

Cheapest in

March

Average price

$1,071
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. 4% potential increase in price ($41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 31, 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

Wed 11/4

6:00 am-10:25 pm

2 stops25h 25m

Ho Chi Minh City

Tue 12/22

2:05 pm-4:56 pm

2 stops41h 51m

$853

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Wed 10/7

6:20 am-10:10 pm

2 stops25h 50m

Ho Chi Minh City

Sun 10/18

11:45 pm-5:12 pm

2 stops31h 27m

$853

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Thu 9/3

6:20 am-10:10 pm

2 stops25h 50m

Ho Chi Minh City

Wed 9/23

7:30 am-10:40 pm

2 stops29h 10m

$853

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Tue 8/25

12:45 am-9:00 am

1 stop18h 15m

Da Nang

Wed 9/2

10:00 am-6:40 pm

1 stop22h 40m

$877
Quickest round-trip

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Wed 10/14

12:10 am-9:40 am

1 stop19h 30m

Ho Chi Minh City

Sat 3/13

11:00 am-5:05 pm

1 stop21h 05m

$878

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 10/27

11:50 pm-10:00 am

1 stop20h 10m

Ho Chi Minh City

Fri 12/11

11:00 am-5:05 pm

1 stop21h 05m

$879

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 10/17

12:10 am-9:40 am

1 stop19h 30m

Ho Chi Minh City

Mon 11/9

11:00 am-5:05 pm

1 stop21h 05m

$879

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Fri 10/16

12:10 am-4:20 pm

1 stop26h 10m

Ho Chi Minh City

Mon 3/8

5:15 pm-5:05 pm

1 stop38h 50m

$908

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 8/9

12:45 am-4:50 pm

1 stop26h 05m

Hanoi Noibai

Tue 8/18

11:30 am-6:40 pm

1 stop21h 10m

$914

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sat 10/17

12:10 am-4:50 pm

1 stop26h 40m

Hanoi Noibai

Thu 10/22

11:30 am-6:00 pm

1 stop20h 30m

$914

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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, March is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $737). Flying from Ontario to Vietnam in December is currently the most expensive (average of $1,587). 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 65 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 July 31, 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
8.8
Very good
363 reviews

Crew

9.1

Entertainment

8.7

Overall

8.8

Boarding

8.9

Food

8.6

Comfort

8.8

Reviews

1 / 15
8.0
Excellent

Anonymous,Jul 2026

TPE - CRK

Communication from other airlines. They were not aware that my connecting flight was late. I booked everything here but no one took care of it by checking.
STARLUX Airlines
8.8
Very good
363 reviews
STARLUX Airlines
8.8
Very good
363 reviews

Crew

9.1

Entertainment

8.7

Overall

8.8

Boarding

8.9

Food

8.6

Comfort

8.8

Reviews

1 / 15
8.0
Excellent

Anonymous,Jul 2026

TPE - CRK

Communication from other airlines. They were not aware that my connecting flight was late. I booked everything here but no one took care of it by checking.
Korean Air
8.4
Very good
1,223 reviews
STARLUX Airlines
8.8
Very good
363 reviews

Crew

9.1

Entertainment

8.7

Overall

8.8

Boarding

8.9

Food

8.6

Comfort

8.8

Reviews

1 / 15
8.0
Excellent

Anonymous,Jul 2026

TPE - CRK

Communication from other airlines. They were not aware that my connecting flight was late. I booked everything here but no one took care of it by checking.
China Airlines
8.3
Very good
838 reviews
STARLUX Airlines
8.8
Very good
363 reviews

Crew

9.1

Entertainment

8.7

Overall

8.8

Boarding

8.9

Food

8.6

Comfort

8.8

Reviews

1 / 15
8.0
Excellent

Anonymous,Jul 2026

TPE - CRK

Communication from other airlines. They were not aware that my connecting flight was late. I booked everything here but no one took care of it by checking.
Asiana Airlines
8.1
Very good
555 reviews
STARLUX Airlines
8.8
Very good
363 reviews

Crew

9.1

Entertainment

8.7

Overall

8.8

Boarding

8.9

Food

8.6

Comfort

8.8

Reviews

1 / 15
8.0
Excellent

Anonymous,Jul 2026

TPE - CRK

Communication from other airlines. They were not aware that my connecting flight was late. I booked everything here but no one took care of it by checking.
Delta
7.8
Good
8,498 reviews
STARLUX Airlines
8.8
Very good
363 reviews

Crew

9.1

Entertainment

8.7

Overall

8.8

Boarding

8.9

Food

8.6

Comfort

8.8

Reviews

1 / 15
8.0
Excellent

Anonymous,Jul 2026

TPE - CRK

Communication from other airlines. They were not aware that my connecting flight was late. I booked everything here but no one took care of it by checking.

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 $877, Delta can have you in Vietnam from Ontario in 18h 15m. 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?

    $312 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Korean Air and China Airlines, with prices starting from $341 and $378, 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, March is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $737). Flying from Ontario to Vietnam in December is currently the most expensive (average of $1,587). 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 July 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
Korean AirCheapest$611Average$852FlexibilityNo cancel feeOn-time81%
DeltaCheapest$656Average$755FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$690Average$817FlexibilityNo cancel feeOn-time70%
Asiana AirlinesCheapest$735Average$917FlexibilityNo cancel feeOn-time76%
STARLUX AirlinesCheapest$741Average$902FlexibilityNo cancel feeOn-timeN/A

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