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$371+ 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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
May 17 — May 241
Sat 5/17
Sat 5/24
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 May 12, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$822
(Justfly.com)

One-way from

$371
(CrystalTravel)

Popular in

June

Cheapest in

April

Average price

$1,018
Provider with most accurate pricing for Los Angeles-Ho Chi Minh City flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Ho Chi Minh City flights.
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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 ($251 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 12, 2025.

This Justfly.com deal was found by Cheapflights users on 5/11. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/257:00 amONT - DAD
2 stops24h 05mKorean Air
Sun 9/710:55 pmDAD - ONT
2 stops32h 22mKorean Air
Deal found 5/11$822
This FlightHub deal was found by Cheapflights users on 5/11. 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.
Sat 8/2311:45 pmONT - DAD
1 stop27h 50mSTARLUX Airlines
Fri 9/56:45 pmDAD - ONT
1 stop36h 20mSTARLUX Airlines
Deal found 5/11$827
This oojo deal was found by Cheapflights users on 5/11. 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 9/811:10 pmONT - HAN
1 stop27h 40mSTARLUX Airlines
Mon 9/1511:10 amHAN - ONT
1 stop19h 55mSTARLUX Airlines
Deal found 5/11$828
This Justfly.com deal was found by Cheapflights users on 5/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/317:00 amONT - HAN
2 stops24h 40mKorean Air
Sun 11/911:00 pmHAN - ONT
2 stops33h 17mKorean Air
Deal found 5/12$836
This oojo deal was found by Cheapflights users on 5/11. 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 9/712:45 amONT - HAN
1 stop19h 50mChina Airlines
Mon 9/155:50 pmHAN - ONT
1 stop38h 10mChina Airlines
Deal found 5/11$856
This Booking.com deal was found by Cheapflights users on 5/12. 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 9/1211:10 pmONT - SGN
1 stop28h 05mSTARLUX Airlines
Sat 10/411:30 amSGN - ONT
1 stop19h 35mSTARLUX Airlines
Deal found 5/12$862
This Gotogate deal was found by Cheapflights users on 5/12. 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.
Wed 8/612:45 amONT - SGN
1 stop25h 35mChina Airlines
Thu 9/410:50 amSGN - ONT
1 stop21h 50mChina Airlines
Deal found 5/12$864
This Orbitz deal was found by Cheapflights users on 5/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/127:00 amONT - SGN
2 stops25h 05mMultiple Airlines
Tue 9/96:25 pmSGN - ONT
1 stop36h 40mMultiple Airlines
Deal found 5/11$865
This Justfly.com deal was found by Cheapflights users on 5/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/26:30 amONT - SGN
2 stops25h 35mKorean Air
Sat 9/67:35 amSGN - ONT
2 stops29h 08mKorean Air
Deal found 5/12$872
This United Airlines deal was found by Cheapflights users on 5/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/25:10 amONT - SGN
2 stops29h 05mUnited Airlines
Fri 9/127:00 amSGN - ONT
2 stops24h 37mUnited Airlines
Deal found 5/12$873
This United Airlines deal was found by Cheapflights users on 5/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/46:00 amONT - HAN
2 stops26h 15mUnited Airlines
Sat 9/2011:35 pmHAN - ONT
2 stops32h 02mUnited Airlines
Deal found 5/12$878
This oojo deal was found by Cheapflights users on 5/12. 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.
Sat 9/612:45 amONT - DAD
1 stop25h 50mChina Airlines
Sun 9/285:35 pmDAD - ONT
1 stop38h 25mChina Airlines
Deal found 5/12$887

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 May 12, 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

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Mon 8/25

7:00 am-9:05 pm

2 stops24h 05m

Da Nang

Sun 9/7

10:55 pm-5:17 pm

2 stops32h 22m

$822

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sat 8/23

11:45 pm-5:35 pm

1 stop27h 50m

Da Nang

Fri 9/5

6:45 pm-5:05 pm

1 stop36h 20m

$827

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Mon 9/8

11:10 pm-4:50 pm

1 stop27h 40m

Hanoi Noibai

Mon 9/15

11:10 am-5:05 pm

1 stop19h 55m

$828

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Fri 10/31

7:00 am-9:40 pm

2 stops24h 40m

Hanoi Noibai

Sun 11/9

11:00 pm-5:17 pm

2 stops33h 17m

$836

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 9/7

12:45 am-10:35 am

1 stop19h 50m

Hanoi Noibai

Mon 9/15

5:50 pm-6:00 pm

1 stop38h 10m

$856

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Fri 9/12

11:10 pm-5:15 pm

1 stop28h 05m

Ho Chi Minh City

Sat 10/4

11:30 am-5:05 pm

1 stop19h 35m

$862

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Wed 8/6

12:45 am-4:20 pm

1 stop25h 35m

Ho Chi Minh City

Thu 9/4

10:50 am-6:40 pm

1 stop21h 50m

$864

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 8/12

7:00 am-10:05 pm

2 stops25h 05m

Ho Chi Minh City

Tue 9/9

6:25 pm-5:05 pm

1 stop36h 40m

$865

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 8/2

6:30 am-10:05 pm

2 stops25h 35m

Ho Chi Minh City

Sat 9/6

7:35 am-10:43 pm

2 stops29h 08m

$872

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 9/2

5:10 am-12:15 am

2 stops29h 05m

Ho Chi Minh City

Fri 9/12

7:00 am-5:37 pm

2 stops24h 37m

$873

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 43 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, March is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $920). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,531). 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 May 12, 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.

Rainfall in Vietnam by month

Plan your trip to Vietnam by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Vietnam ranges from 0.0 - 13.4 inches per month. September is typically the wettest month, when rainfall can reach 13.4 in. February is typically the driest time to visit Vietnam when rainfall is around 0.0 in.

Temperature in Vietnam by month

Plan your trip to Vietnam by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Vietnam, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

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 May 12, 2025.
Read reviews from past customers who have flown STARLUX Airlines, EVA Air and Korean Air from Ontario to Vietnam. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Boarding

9.1

Entertainment

9.0

Food

8.9

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
STARLUX Airlines
9.1
Wonderful
168 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Boarding

9.1

Entertainment

9.0

Food

8.9

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
EVA Air
8.4
Very good
1,192 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Boarding

9.1

Entertainment

9.0

Food

8.9

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Korean Air
8.4
Very good
1,072 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Boarding

9.1

Entertainment

9.0

Food

8.9

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Japan Airlines
8.3
Very good
1,472 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Boarding

9.1

Entertainment

9.0

Food

8.9

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
China Airlines
8.3
Very good
732 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Overall

9.1

Boarding

9.1

Entertainment

9.0

Food

8.9

Crew

9.3

Comfort

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.

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?

    $371 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 STARLUX Airlines and United Airlines, with prices starting from $423 and $430, 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 $920). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,531). 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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Top 6 airlines flying from Ontario to Vietnam

Discover the top 6 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 May 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$538Average$906FlexibilityNo cancel feeOn-time69%
DeltaCheapest$556Average$838FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$657Average$1,100FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$705Average$909FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$749Average$910FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$871Average$1,356FlexibilityNo cancel feeOn-timeN/A

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