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$368+ 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
8월 21 — 8월 281
목 8/21
목 8/28
1 adult, Economy
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Cheap flight deals from Ontario to Vietnam

Keep the following information in mind while searching for Ontario to Vietnam flight deals. Data was last updated 8월 16, 2025.

Round-trip from

$710
(Delta)

One-way from

$368
(Delta)

Popular in

June

Cheapest in

August

Average price

$746
From Ontario to Vietnam
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One-way flight from Ontario to Vietnam
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Highest demand for flights based on searches. 20% potential increase in price ($236 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 8월 16, 2025.

This Delta deal was found by Cheapflights users on 8/14. 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.
화 9/96:05 amONT - HAN
2 stops25h 30mDelta
월 9/2212:00 pmHAN - ONT
2 stops25h 42mDelta
Deal found 8/14$710
This Delta deal was found by Cheapflights users on 8/15. 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.
화 9/26:00 amONT - HAN
2 stops25h 35mDelta
화 9/912:00 pmHAN - ONT
2 stops24h 40mDelta
Deal found 8/15$724
This Delta deal was found by Cheapflights users on 8/15. 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.
목 11/66:37 amONT - HAN
2 stops37h 33mDelta
토 11/2212:20 pmHAN - ONT
2 stops25h 22mDelta
Deal found 8/15$750
This Korean Air deal was found by Cheapflights users on 8/15. 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.
일 11/25:37 amONT - HAN
2 stops24h 03mKorean Air
월 11/1011:00 pmHAN - ONT
2 stops33h 17mKorean Air
Deal found 8/15$751
This Delta deal was found by Cheapflights users on 8/15. 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.
일 11/911:29 amONT - HAN
2 stops56h 41mDelta
토 11/2212:20 pmHAN - ONT
2 stops25h 22mDelta
Deal found 8/15$757
This CrystalTravel deal was found by Cheapflights users on 8/14. 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.
월 8/2511:45 pmONT - SGN
1 stop20h 30mSTARLUX Airlines
월 9/811:30 amSGN - ONT
1 stop19h 35mSTARLUX Airlines
Deal found 8/14$767
This Gotogate deal was found by Cheapflights users on 8/15. 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.
금 9/1912:10 amONT - SGN
1 stop26h 10mChina Airlines
금 10/1710:50 amSGN - ONT
1 stop21h 10mChina Airlines
Deal found 8/15$768
This Booking.com deal was found by Cheapflights users on 8/14. 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.
일 9/1412:45 amONT - SGN
1 stop18h 55mMultiple Airlines
월 12/2211:20 amSGN - ONT
1 stop20h 30mMultiple Airlines
Deal found 8/14$769
This Booking.com deal was found by Cheapflights users on 8/14. 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.
월 9/2212:10 amONT - SGN
1 stop26h 10mMultiple Airlines
수 10/111:20 amSGN - ONT
1 stop20h 40mMultiple Airlines
Deal found 8/14$770
This FlightHub deal was found by Cheapflights users on 8/15. 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.
화 9/3012:10 amONT - SGN
1 stop19h 30mChina Airlines
금 10/1010:50 amSGN - ONT
1 stop21h 10mChina Airlines
Deal found 8/15$771
This oojo deal was found by Cheapflights users on 8/14. 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.
화 9/912:45 amONT - SGN
1 stop18h 55mChina Airlines
수 9/2410:50 amSGN - ONT
1 stop21h 10mChina Airlines
Deal found 8/14$772
This Gotogate deal was found by Cheapflights users on 8/14. 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.
일 9/712:45 amONT - SGN
1 stop18h 55mChina Airlines
목 9/115:30 pmSGN - ONT
1 stop39h 10mChina Airlines
Deal found 8/14$773

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 8월 16, 2025.
Use the filters below to find and compare flights from Ontario to Vietnam that are best for you.

Fly from

Ontario

Fly to

Vietnam

Route

Depart

Return

Price

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

목 9/11

6:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

목 9/25

12:00 pm-11:42 pm

2 stops25h 42m

$710

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

목 9/11

6:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

일 9/21

11:10 pm-10:40 pm

2 stops37h 30m

$710

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

화 9/9

6:05 am-9:35 pm

2 stops25h 30m

Hanoi Noibai

목 9/25

12:00 pm-11:42 pm

2 stops25h 42m

$710

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

화 9/9

6:05 am-9:35 pm

2 stops25h 30m

Hanoi Noibai

월 9/22

12:00 pm-11:42 pm

2 stops25h 42m

$710

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

수 9/10

6:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

수 9/24

12:00 pm-11:42 pm

2 stops25h 42m

$710

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

목 9/11

6:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

화 9/23

12:00 pm-11:42 pm

2 stops25h 42m

$710

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

화 9/9

6:05 am-9:35 pm

2 stops25h 30m

Hanoi Noibai

화 9/23

12:00 pm-11:42 pm

2 stops25h 42m

$710

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

월 9/15

6:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

월 9/22

11:10 pm-10:40 pm

2 stops37h 30m

$710

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

월 9/15

6:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

수 9/24

12:00 pm-11:42 pm

2 stops25h 42m

$710

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

월 9/15

6:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

일 9/21

11:10 pm-10:40 pm

2 stops37h 30m

$710

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 60 results
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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, August is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $910). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,430). 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.

What is the cheapest time of day to fly from ONT to VN?

Find hourly flight availability from Ontario to Vietnam. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 8월 16, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Vietnam as you normally would.

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 8월 16, 2025.
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
9.0
Wonderful
206 reviews

Food

8.8

Boarding

9.0

Overall

9.0

Entertainment

8.9

Comfort

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.0
Wonderful
206 reviews
STARLUX Airlines
9.0
Wonderful
206 reviews

Food

8.8

Boarding

9.0

Overall

9.0

Entertainment

8.9

Comfort

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,131 reviews
STARLUX Airlines
9.0
Wonderful
206 reviews

Food

8.8

Boarding

9.0

Overall

9.0

Entertainment

8.9

Comfort

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
762 reviews
STARLUX Airlines
9.0
Wonderful
206 reviews

Food

8.8

Boarding

9.0

Overall

9.0

Entertainment

8.9

Comfort

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Asiana Airlines
8.2
Very good
473 reviews
STARLUX Airlines
9.0
Wonderful
206 reviews

Food

8.8

Boarding

9.0

Overall

9.0

Entertainment

8.9

Comfort

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
United Airlines
7.4
Good
8,916 reviews
STARLUX Airlines
9.0
Wonderful
206 reviews

Food

8.8

Boarding

9.0

Overall

9.0

Entertainment

8.9

Comfort

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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.

  • What are the cheapest airlines to fly from Ontario to Vietnam one-way?

    $368 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 $371 and $453, 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, August is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $910). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,430). 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

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Alternative routes for Ontario to Vietnam

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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 8월 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$620Average$922FlexibilityNo cancel feeOn-time69%
Asiana AirlinesCheapest$640Average$793FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$721Average$1,085FlexibilityNo cancel feeOn-time81%
STARLUX AirlinesCheapest$767Average$1,126FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$769Average$911FlexibilityNo cancel feeOn-time70%

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