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$430+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Mar 15 — Mar 221
Sat 3/15
Sat 3/22
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 March 10, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$785
(Delta)

One-way from

$430
(United Airlines)

Popular in

June

Cheapest in

March

Average price

$816
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. 22% potential increase in price ($284 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 10, 2025.

This Delta deal was found by Cheapflights users on 3/8. 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 8/245:53 pmONT - HAN
2 stops37h 42mDelta
Wed 9/1012:00 pmHAN - ONT
2 stops25h 43mDelta
Deal found 3/8$785
This FlightHub deal was found by Cheapflights users on 3/10. 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.
Mon 3/2411:45 pmONT - SGN
1 stop20h 15mChina Airlines
Mon 4/2110:50 amSGN - ONT
1 stop21h 10mChina Airlines
Deal found 3/10$790
This Delta deal was found by Cheapflights users on 3/8. 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 3/165:40 amONT - SGN
2 stops27h 40mDelta
Tue 4/811:45 pmSGN - ONT
2 stops36h 39mDelta
Deal found 3/8$805
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Wed 9/36:27 pmONT - SGN
2 stops37h 28mUnited Airlines
Tue 9/3011:15 pmSGN - ONT
2 stops37h 38mUnited Airlines
Deal found 3/10$816
This United deal was found by Cheapflights users on 3/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/126:43 pmONT - SGN
2 stops37h 12mMultiple Airlines
Tue 9/911:15 pmSGN - ONT
2 stops30h 31mMultiple Airlines
Deal found 3/9$823
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Wed 8/205:45 amONT - HAN
2 stops26h 30mUnited Airlines
Mon 11/1012:25 amHAN - ONT
2 stops27h 45mUnited Airlines
Deal found 3/10$827
This FlightHub deal was found by Cheapflights users on 3/10. 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.
Sun 5/412:10 amONT - DAD
1 stop26h 25mChina Airlines
Thu 5/229:50 amDAD - ONT
1 stop22h 10mChina Airlines
Deal found 3/10$829
This FlightHub deal was found by Cheapflights users on 3/9. 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.
Mon 4/2812:10 amONT - HAN
1 stop26h 40mChina Airlines
Wed 5/1411:35 amHAN - ONT
1 stop20h 25mChina Airlines
Deal found 3/9$834
This ScholarTrip deal was found by Cheapflights users on 3/9. 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 ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/15:40 amONT - SGN
2 stops26h 25mKorean Air
Tue 4/297:35 amSGN - ONT
2 stops23h 09mKorean Air
Deal found 3/9$837
This CrystalTravel deal was found by Cheapflights users on 3/9. 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.
Mon 9/2911:10 pmONT - SGN
1 stop21h 05mSTARLUX Airlines
Mon 10/2011:30 amSGN - ONT
1 stop19h 35mSTARLUX Airlines
Deal found 3/9$840
This Justfly.com deal was found by Cheapflights users on 3/10. 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.
Wed 8/207:00 amONT - HAN
2 stops24h 35mKorean Air
Tue 11/1112:20 pmHAN - ONT
2 stops20h 02mKorean Air
Deal found 3/10$935
This SmartFares deal was found by Cheapflights users on 3/10. 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.
Fri 8/2211:45 pmONT - HAN
1 stop20h 40mSTARLUX Airlines
Fri 9/1211:10 amHAN - ONT
1 stop19h 55mSTARLUX Airlines
Deal found 3/10$938

Find flights from Ontario to Vietnam within your budget

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 10, 2025.

Fly from

Ontario

Fly to

Vietnam

Route

Depart

Return

Price

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Sun 8/24

5:53 pm-9:35 pm

2 stops37h 42m

Hanoi Noibai

Wed 9/10

12:00 pm-11:43 pm

2 stops25h 43m

$785

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 3/24

11:45 pm-10:00 am

1 stop20h 15m

Ho Chi Minh City

Mon 4/21

10:50 am-6:00 pm

1 stop21h 10m

$790

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 4/19

11:45 am-11:15 pm

2 stops45h 30m

Ho Chi Minh City

Sat 5/31

1:55 pm-6:19 pm

2 stops42h 24m

$812

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Wed 9/3

6:27 pm-9:55 pm

2 stops37h 28m

Ho Chi Minh City

Tue 9/30

11:15 pm-10:53 pm

2 stops37h 38m

$816

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 8/12

6:43 pm-9:55 pm

2 stops37h 12m

Ho Chi Minh City

Tue 9/9

11:15 pm-3:46 pm

2 stops30h 31m

$823

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Wed 8/20

5:45 am-10:15 pm

2 stops26h 30m

Hanoi Noibai

Mon 11/10

12:25 am-1:10 pm

2 stops27h 45m

$827

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sun 5/4

12:10 am-4:35 pm

1 stop26h 25m

Da Nang

Thu 5/22

9:50 am-6:00 pm

1 stop22h 10m

$829

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Mon 4/28

12:10 am-4:50 pm

1 stop26h 40m

Hanoi Noibai

Wed 5/14

11:35 am-6:00 pm

1 stop20h 25m

$834

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 4/1

5:40 am-10:05 pm

2 stops26h 25m

Ho Chi Minh City

Tue 4/29

7:35 am-4:44 pm

2 stops23h 09m

$837

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Fri 8/15

11:45 pm-10:15 am

1 stop20h 30m

Ho Chi Minh City

Mon 9/22

11:30 am-5:05 pm

1 stop19h 35m

$893

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 39 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.

Travel insights for flights from Ontario to Vietnam

Get recent, data-driven insights about flights from Ontario to Vietnam including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Ontario to Vietnam?

Currently, November is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $936). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,590). 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 March 10, 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 March 10, 2025.
Read reviews from past customers who have flown STARLUX Airlines, Korean Air and Japan Airlines 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
141 reviews

Food

9.0

Boarding

9.1

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

STARLUX Airlines
9.1
Wonderful
141 reviews
STARLUX Airlines
9.1
Wonderful
141 reviews

Food

9.0

Boarding

9.1

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

Korean Air
8.4
Very good
1,043 reviews
STARLUX Airlines
9.1
Wonderful
141 reviews

Food

9.0

Boarding

9.1

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

Japan Airlines
8.3
Very good
1,439 reviews
STARLUX Airlines
9.1
Wonderful
141 reviews

Food

9.0

Boarding

9.1

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

China Airlines
8.2
Very good
724 reviews
STARLUX Airlines
9.1
Wonderful
141 reviews

Food

9.0

Boarding

9.1

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

Delta
8.0
Very good
7,973 reviews
STARLUX Airlines
9.1
Wonderful
141 reviews

Food

9.0

Boarding

9.1

Crew

9.3

Overall

9.1

Comfort

9.0

Entertainment

9.1

Reviews

1 / 5

10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

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?

    $430 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on China Airlines and Delta, with prices starting from $449 and $523, 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 - Da Nang or Ontario - Hanoi Noibai.

  • 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, November is the cheapest month in which you can book a flight from Ontario to Vietnam (average of $936). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,590). 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 March 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$538Average$906FlexibilityNo cancel feeOn-time69%
DeltaCheapest$589Average$838FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$657Average$940FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$705Average$1,238FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$781Average$918FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$885Average$1,187FlexibilityNo cancel feeOn-timeN/A
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