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

$378 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 United Airlines and Delta, with prices starting from $394 and $445, 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.

What are the most popular airlines that fly from Ontario to Vietnam?

Before booking your flight from Ontario to Vietnam check out the most popular airlines for this route: China Airlines, Delta or STARLUX Airlines.

How far in advance should I book a flight from Ontario to Vietnam?

Users have found that booking a flight from Ontario to Vietnam at least 28 days early can save you up to 7% on average compared to booking a flight this week. If booking 28 days before your flight isn’t an option for you, users have found flights from Ontario to Vietnam for as little as $887 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $931 for flights departing within the next 3 days.

What is the cheapest month to fly from Ontario to Vietnam?

The best pricing can be found in the month of March. Prices to Vietnam from Ontario average $968. You can even find prices in March for less than $968, as users have found deals to Vietnam from as low as $681. The month of June appears to be one of the more expensive times to travel to Vietnam from Ontario. Flying in the targeted month can save you up to 43%.

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.

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.

$1,037+ Flights from Ontario to Vietnam

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Cheap flight deals from Ontario to Vietnam

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$801 (United Airlines)
One-way from	$378 (Justfly.com)
Popular in	June
Cheapest in	March
Average price	$1,069

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

Search Deals

One-way flight from Ontario to Vietnam

Search Deals

Highest demand for flights based on searches. 21% potential increase in price ($271 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in May 2025

Search Deals

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 mayo 1, 2025.

mar. 9/96:00 amONT - HAN

2 stops26h 15mUnited Airlines

mar. 9/3011:35 pmHAN - ONT

2 stops31h 57mUnited Airlines

Deal found 4/29

$774

mar. 9/167:00 amONT - DAD

2 stops24h 05mKorean Air

mar. 10/2811:20 pmDAD - ONT

2 stops31h 57mKorean Air

Deal found 4/30

$821

mar. 5/65:45 amONT - SGN

2 stops27h 30mKorean Air

vie. 5/167:35 amSGN - ONT

2 stops24h 45mKorean Air

Deal found 4/29

$837

vie. 8/811:45 pmONT - HAN

1 stop20h 40mSTARLUX Airlines

vie. 8/2911:10 amHAN - ONT

1 stop20h 30mSTARLUX Airlines

Deal found 4/29

$843

jue. 11/206:00 amONT - SGN

2 stops25h 55mUnited Airlines

sáb. 11/296:00 amSGN - ONT

2 stops31h 35mUnited Airlines

Deal found 4/30

$844

dom. 8/3112:45 amONT - SGN

1 stop18h 55mChina Airlines

lun. 9/2210:50 amSGN - ONT

1 stop21h 10mChina Airlines

Deal found 4/30

$845

vie. 8/16:30 amONT - SGN

2 stops25h 35mDelta

sáb. 8/3011:45 pmSGN - ONT

2 stops36h 56mDelta

Deal found 4/30

$847

lun. 9/812:45 amONT - HAN

1 stop19h 50mChina Airlines

mar. 9/3011:35 amHAN - ONT

1 stop20h 25mChina Airlines

Deal found 4/29

$850

mié. 8/2011:45 pmONT - SGN

1 stop20h 30mSTARLUX Airlines

mié. 8/2711:30 amSGN - ONT

1 stop20h 10mSTARLUX Airlines

Deal found 4/29

$859

lun. 8/46:30 amONT - HAN

2 stops38h 10mKorean Air

lun. 8/1112:00 pmHAN - ONT

2 stops48h 41mKorean Air

Deal found 4/30

$860

jue. 8/76:30 amONT - SGN

2 stops25h 35mMultiple Airlines

mié. 9/1011:30 amSGN - ONT

1 stop19h 35mMultiple Airlines

Deal found 4/30

$864

mar. 5/65:45 amONT - HAN

2 stops25h 50mDelta

mié. 5/1411:10 pmHAN - ONT

2 stops33h 10mDelta

Deal found 4/30

$952

Best flights from Ontario to Vietnam
Discover carefully curated flight deals from Ontario to Vietnam that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated mayo 1, 2025.

lun. 8/256:00 amONT - HAN

2 stops26h 15mUnited Airlines

mié. 9/1011:35 pmHAN - ONT

2 stops32h 02mUnited Airlines

Deal found 4/30

$801

mar. 5/65:45 amONT - SGN

2 stops27h 30mKorean Air

vie. 5/167:35 amSGN - ONT

2 stops24h 45mKorean Air

Deal found 4/29

$837

vie. 8/811:45 pmONT - HAN

1 stop20h 40mSTARLUX Airlines

vie. 8/2911:10 amHAN - ONT

1 stop20h 30mSTARLUX Airlines

Deal found 4/29

$843

dom. 5/1112:10 amONT - SGN

1 stop26h 10mChina Airlines

mié. 11/1211:00 amSGN - ONT

1 stop20h 50mChina Airlines

Deal found 4/28

$845

lun. 5/55:45 amONT - SGN

2 stops26h 20mMultiple Airlines

dom. 5/1811:45 pmSGN - ONT

2 stops32h 35mMultiple Airlines

Deal found 4/29

$871

dom. 7/136:00 amONT - HAN

2 stops25h 35mDelta

mié. 7/3011:10 pmHAN - ONT

2 stops49h 15mDelta

Deal found 4/30

$1,311

mié. 7/164:00 pmONT - DAD

2 stops29h 35mEVA Air

mié. 7/3012:55 pmDAD - ONT

2 stops36h 10mEVA Air

Deal found 4/28

$1,394

jue. 10/26:00 amONT - HAN

2 stops25h 50mJapan Airlines

mié. 10/2211:20 pmHAN - ONT

2 stops29h 52mJapan Airlines

Deal found 4/30

$1,561

mar. 9/912:45 amONT - HAN

1 stop19h 50mChina Airlines

mié. 10/811:35 amHAN - ONT

1 stop20h 25mChina Airlines

Deal found 4/30

$850

lun. 8/46:30 amONT - HAN

2 stops38h 10mKorean Air

lun. 8/1112:00 pmHAN - ONT

2 stops48h 41mKorean Air

Deal found 4/30

$860

lun. 5/56:00 amONT - SGN

2 stops25h 55mUnited Airlines

dom. 5/1811:15 pmSGN - ONT

2 stops35h 19mUnited Airlines

Deal found 4/30

$878

mié. 9/107:00 amONT - HAN

2 stops24h 35mMultiple Airlines

mié. 10/811:35 amHAN - ONT

1 stop20h 25mMultiple Airlines

Deal found 4/30

$976

Last-minute flights from Ontario to Vietnam
Discover last-minute flight deals from Ontario to Vietnam. Data last updated mayo 1, 2025 and is based on user searches.

lun. 5/56:00 amONT - SGN

2 stops25h 55mUnited Airlines

dom. 5/1811:15 pmSGN - ONT

2 stops35h 19mUnited Airlines

Deal found 4/30

$878

lun. 5/56:24 pmONT - SGN

2 stops61h 31mMultiple Airlines

vie. 6/611:30 amSGN - ONT

1 stop19h 35mMultiple Airlines

Deal found 4/30

$1,014

lun. 5/512:10 amONT - HAN

1 stop20h 25mChina Airlines

mar. 5/275:50 pmHAN - ONT

1 stop38h 10mChina Airlines

Deal found 4/29

$1,018

lun. 5/55:45 amONT - HAN

2 stops25h 50mKorean Air

mar. 5/2711:10 pmHAN - ONT

2 stops33h 10mKorean Air

Deal found 4/29

$1,107

lun. 5/510:51 amONT - HAN

2 stops30h 24mQatar Airways

dom. 5/187:30 pmHAN - ONT

2 stops32h 22mQatar Airways

Deal found 4/29

$2,537

lun. 5/56:01 amONT - SGN

3 stops25h 59mAmerican Airlines

vie. 6/611:20 pmSGN - ONT

2 stops28h 30mAmerican Airlines

Deal found 4/30

$4,991

mar. 5/65:45 amONT - SGN

2 stops27h 30mKorean Air

vie. 5/167:35 amSGN - ONT

2 stops24h 45mKorean Air

Deal found 4/29

$837

mar. 5/66:00 amONT - HAN

2 stops26h 15mUnited Airlines

mar. 5/2711:35 pmHAN - ONT

2 stops37h 10mUnited Airlines

Deal found 4/29

$889

mar. 5/612:10 amONT - SGN

1 stop19h 30mChina Airlines

mar. 9/910:50 amSGN - ONT

1 stop21h 50mChina Airlines

Deal found 4/29

$941

mar. 5/65:45 amONT - HAN

2 stops25h 50mDelta

lun. 5/1911:10 pmHAN - ONT

2 stops33h 10mDelta

Deal found 4/30

$952

mar. 5/65:45 amONT - HAN

2 stops25h 50mDelta

mié. 5/1411:10 pmHAN - ONT

2 stops33h 10mDelta

Deal found 4/30

$952

dom. 5/116:00 amONT - DAD

2 stops25h 05mKorean Air

dom. 5/2510:55 pmDAD - ONT

2 stops33h 25mKorean Air

Deal found 4/29

$987

One-way flights from Ontario to Vietnam
Search for one-way flight options from Ontario to Vietnam. Find affordable one-way fares based on user searches. Data last updated mayo 1, 2025.

lun. 8/46:30 amONT - SGN

2 stops40h 05mKorean Air

Deal found 4/30

$378

dom. 8/176:39 pmONT - SGN

2 stops37h 16mUnited Airlines

Deal found 4/29

$394

mié. 5/76:00 amONT - SGN

2 stops26h 05mDelta

Deal found 4/30

$445

vie. 8/111:45 pmONT - SGN

1 stop20h 30mSTARLUX Airlines

Deal found 4/30

$449

dom. 8/312:45 amONT - SGN

1 stop25h 35mChina Airlines

Deal found 4/30

$477

lun. 5/126:00 amONT - DAD

2 stops25h 05mKorean Air

Deal found 4/30

$498

jue. 5/86:00 amONT - HAN

2 stops26h 15mUnited Airlines

Deal found 4/29

$501

sáb. 5/108:24 amONT - SGN

2 stops35h 16mMultiple Airlines

Deal found 4/30

$520

mié. 7/97:36 pmONT - DAD

3 stops59h 54mMultiple Airlines

Deal found 4/29

$586

mar. 5/134:29 pmONT - DAD

2 stops29h 06mEVA Air

Deal found 4/28

$594

dom. 5/412:10 amONT - DAD

1 stop26h 25mChina Airlines

Deal found 4/28

$637

mar. 5/134:29 pmONT - SGN

2 stops29h 11mEVA Air

Deal found 4/30

$730

Cheapflights Fare Finder

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

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

lun. 7/14

6:10 am-10:15 pm

2 stops26h 05m

Hanoi Noibai

lun. 7/28

11:35 pm-5:43 pm

2 stops32h 08m

$828

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

sáb. 8/16

7:00 am-10:05 pm

2 stops25h 05m

Ho Chi Minh City

vie. 9/12

7:35 am-5:17 pm

2 stops23h 42m

$838

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

dom. 8/31

12:45 am-9:40 am

1 stop18h 55m

Ho Chi Minh City

lun. 9/22

10:50 am-6:00 pm

1 stop21h 10m

$845

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

vie. 8/1

6:30 am-10:05 pm

2 stops25h 35m

Ho Chi Minh City

sáb. 8/30

11:45 pm-10:41 pm

2 stops36h 56m

$847

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

mié. 8/20

11:45 pm-10:15 am

1 stop20h 30m

Ho Chi Minh City

mié. 8/27

11:30 am-5:40 pm

1 stop20h 10m

$859

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

jue. 8/7

6:30 am-10:05 pm

2 stops25h 35m

Ho Chi Minh City

mié. 9/10

11:30 am-5:05 pm

1 stop19h 35m

$864

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

vie. 8/1

6:39 pm-12:15 am

2 stops39h 36m

Ho Chi Minh City

lun. 9/1

11:15 pm-8:33 pm

2 stops35h 18m

$876

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

lun. 5/12

6:00 am-9:05 pm

2 stops25h 05m

Da Nang

lun. 6/9

10:55 pm-5:10 pm

2 stops32h 15m

$922

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

mar. 5/6

5:45 am-9:35 pm

2 stops25h 50m

Hanoi Noibai

mié. 5/14

11:10 pm-6:20 pm

2 stops33h 10m

$952

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

mié. 5/14

6:00 am-9:35 pm

2 stops25h 35m

Hanoi Noibai

mié. 5/21

11:10 pm-6:20 pm

2 stops33h 10m

$957

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 39 results

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 $921). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,538). 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?

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

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

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

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

161 reviews

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

161 reviews

STARLUX Airlines

9.1

Wonderful

161 reviews

Reviews

1 / 6

10.0

Excellent

Anonymous,Apr 2025

KIX - TPE

EVA Air

8.4

Very good

1,186 reviews

STARLUX Airlines

9.1

Wonderful

161 reviews

Reviews

1 / 6

10.0

Excellent

Anonymous,Apr 2025

KIX - TPE

Korean Air

8.4

Very good

1,069 reviews

STARLUX Airlines

9.1

Wonderful

161 reviews

Reviews

1 / 6

10.0

Excellent

Anonymous,Apr 2025

KIX - TPE

Japan Airlines

8.3

Very good

1,464 reviews

STARLUX Airlines

9.1

Wonderful

161 reviews

Reviews

1 / 6

10.0

Excellent

Anonymous,Apr 2025

KIX - TPE

China Airlines

8.3

Very good

732 reviews

STARLUX Airlines

9.1

Wonderful

161 reviews

Reviews

1 / 6

10.0

Excellent

Anonymous,Apr 2025

KIX - TPE

Related info for your journey

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?
$378 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 United Airlines and Delta, with prices starting from $394 and $445, 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 $921). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,538). 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 6 airlines flying from Ontario to Vietnam

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$538	Average$906	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$556	Average$833	FlexibilityNo cancel fee	On-timeN/A
Korean Air	Cheapest$657	Average$930	FlexibilityNo cancel fee	On-time81%
Asiana Airlines	Cheapest$705	Average$909	FlexibilityNo cancel fee	On-time76%
China Airlines	Cheapest$769	Average$915	FlexibilityNo cancel fee	On-time70%
STARLUX Airlines	Cheapest$888	Average$1,366	FlexibilityNo cancel fee	On-timeN/A

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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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Vietnam with Cheapflights

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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 mayo 1, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Vietnam

Cheapest flights from Ontario to VietnamExplore 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 mayo 1, 2025.

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 mayo 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Vietnam that are best for you.

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.

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?

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 mayo 1, 2025.

Rainfall in Vietnam by month

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

Temperature in Vietnam by month

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

Reviews of airlines servicing Vietnam

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.

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?

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

What are the most popular routes from Ontario to Vietnam?

Can I find deals for flights from Ontario to Vietnam that include hotel bookings?

How can I find direct flights from Ontario to Vietnam?

Can I find deals for business class flights from Ontario to Vietnam?

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

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.

Alternative routes for Ontario to Vietnam

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Ontario to Vietnam

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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 mayo 1, 2025.