HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Vietnam

$361+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SGN
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Vietnam with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 1, 2025.

Round-trip from

$711
(Delta)

One-way from

$361
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$1,195
From Ontario to Vietnam
Search Deals
One-way flight from Ontario to Vietnam
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($236 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 1, 2025.

This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/216:45 amONT - HAN
2 stops24h 50mDelta
Thu 10/3012:20 pmHAN - ONT
2 stops24h 22mDelta
Deal found 6/30$711
This Korean Air deal was found by Cheapflights users on 6/30. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:45 amONT - HAN
2 stops24h 50mKorean Air
Wed 10/2211:10 pmHAN - ONT
2 stops32h 07mKorean Air
Deal found 6/30$716
This oojo deal was found by Cheapflights users on 6/29. 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.
Thu 11/2710:45 pmONT - DAD
1 stop19h 25mChina Airlines
Wed 12/1010:20 amDAD - ONT
1 stop21h 30mChina Airlines
Deal found 6/29$794
This Gotogate deal was found by Cheapflights users on 6/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1312:45 amONT - HAN
1 stop26h 05mChina Airlines
Wed 8/2711:35 amHAN - ONT
1 stop21h 05mChina Airlines
Deal found 6/29$794
This United Airlines deal was found by Cheapflights users on 6/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:00 amONT - HAN
2 stops26h 15mUnited Airlines
Tue 9/3011:35 pmHAN - ONT
2 stops32h 05mUnited Airlines
Deal found 6/29$803
This FlightHub deal was found by Cheapflights users on 6/29. 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.
Wed 9/36:00 amONT - DAD
2 stops25h 05mKorean Air
Wed 9/1710:55 pmDAD - ONT
2 stops32h 05mKorean Air
Deal found 6/29$823
This Trip.com deal was found by Cheapflights users on 6/29. 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.
Wed 8/66:25 amONT - HAN
2 stops38h 15mMultiple Airlines
Mon 8/1811:10 amHAN - ONT
1 stop20h 30mMultiple Airlines
Deal found 6/29$838
This Trip.com deal was found by Cheapflights users on 6/29. 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 9/2612:10 amONT - DAD
2 stops40h 10mMultiple Airlines
Thu 10/26:55 amDAD - ONT
2 stops25h 05mMultiple Airlines
Deal found 6/29$868
This Trip.com deal was found by Cheapflights users on 7/1. 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.
Mon 8/49:47 pmONT - SGN
2 stops48h 48mMultiple Airlines
Wed 10/111:30 amSGN - ONT
1 stop19h 35mMultiple Airlines
Deal found 7/1$883
This United Airlines deal was found by Cheapflights users on 6/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/26:10 amONT - SGN
2 stops25h 45mUnited Airlines
Sun 9/77:00 amSGN - ONT
2 stops24h 37mUnited Airlines
Deal found 6/30$884
This ScholarTrip deal was found by Cheapflights users on 6/30. 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 ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/111:45 pmONT - SGN
1 stop20h 30mSTARLUX Airlines
Tue 8/266:25 pmSGN - ONT
1 stop37h 15mSTARLUX Airlines
Deal found 6/30$897
This Gotogate deal was found by Cheapflights users on 6/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1710:45 pmONT - SGN
1 stop20h 15mChina Airlines
Sun 11/3011:00 amSGN - ONT
1 stop20h 50mChina Airlines
Deal found 6/30$900

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 1, 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

Tue 10/21

6:45 am-9:35 pm

2 stops24h 50m

Hanoi Noibai

Mon 10/27

11:00 pm-10:42 pm

2 stops37h 42m

$711

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Thu 10/16

6:45 am-9:35 pm

2 stops24h 50m

Hanoi Noibai

Wed 10/22

11:10 pm-5:17 pm

2 stops32h 07m

$716

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Thu 11/27

10:45 pm-9:10 am

1 stop19h 25m

Da Nang

Wed 12/10

10:20 am-4:50 pm

1 stop21h 30m

$794

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 11/4

10:45 pm-4:35 pm

1 stop26h 50m

Hanoi Noibai

Thu 11/13

11:35 am-4:50 pm

1 stop20h 15m

$799

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Thu 9/25

5:05 am-10:15 pm

2 stops27h 10m

Hanoi Noibai

Mon 10/27

12:25 am-10:45 pm

2 stops36h 20m

$803

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Wed 9/3

6:00 am-9:05 pm

2 stops25h 05m

Da Nang

Wed 9/17

10:55 pm-5:00 pm

2 stops32h 05m

$823

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Wed 8/6

6:25 am-10:40 am

2 stops38h 15m

Hanoi Noibai

Mon 8/18

11:10 am-5:40 pm

1 stop20h 30m

$838

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Fri 9/26

12:10 am-6:20 am

2 stops40h 10m

Da Nang

Thu 10/2

6:55 am-6:00 pm

2 stops25h 05m

$868

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sat 8/2

6:10 am-9:55 pm

2 stops25h 45m

Ho Chi Minh City

Sun 9/7

7:00 am-5:37 pm

2 stops24h 37m

$884

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 8/12

6:00 am-12:35 pm

2 stops40h 35m

Ho Chi Minh City

Tue 8/26

6:25 pm-5:40 pm

1 stop37h 15m

$889

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 40 results
1
2
3
4

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 $917). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,435). 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 July 1, 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 July 1, 2025.
See what other customers who have flown with STARLUX Airlines, EVA Air, and Korean Air 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
9.1
Wonderful
189 reviews

Overall

9.1

Comfort

9.0

Crew

9.3

Boarding

9.0

Entertainment

9.0

Food

8.9

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
9.1
Wonderful
189 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Overall

9.1

Comfort

9.0

Crew

9.3

Boarding

9.0

Entertainment

9.0

Food

8.9

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.
EVA Air
8.4
Very good
1,214 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Overall

9.1

Comfort

9.0

Crew

9.3

Boarding

9.0

Entertainment

9.0

Food

8.9

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
1,101 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Overall

9.1

Comfort

9.0

Crew

9.3

Boarding

9.0

Entertainment

9.0

Food

8.9

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.
Japan Airlines
8.3
Very good
1,505 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Overall

9.1

Comfort

9.0

Crew

9.3

Boarding

9.0

Entertainment

9.0

Food

8.9

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
745 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Overall

9.1

Comfort

9.0

Crew

9.3

Boarding

9.0

Entertainment

9.0

Food

8.9

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?

    $361 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 Delta and China Airlines, with prices starting from $368 and $444, 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 $917). Flying from Ontario to Vietnam in June is currently the most expensive (average of $1,435). 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.

Alternative routes for Ontario to Vietnam

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Haneda flights
Los Angeles to Narita flights
San Francisco to Narita flights
San Francisco to Haneda flights
Los Angeles to Manila flights
Los Angeles to Suvarnabhumi flights
San Francisco to Manila flights
San Francisco to Hong Kong flights
Los Angeles to Incheon Intl flights
San Francisco to New Delhi flights
Ontario to Narita flights
San Francisco to Suvarnabhumi flights
Los Angeles to Taiwan Taoyuan Intl flights
San Francisco to Ho Chi Minh City flights
Los Angeles to Ho Chi Minh City flights
San Francisco to Taiwan Taoyuan Intl flights
San Diego to Narita flights
Ontario to Haneda flights
San Francisco to Mumbai flights
Los Angeles to Hongqiao Intl flights
Los Angeles to Kansai Intl flights
San Francisco to Hongqiao Intl flights
Los Angeles to Pu Dong flights
Ontario to Suvarnabhumi flights
San Francisco to Bangalore flights
Los Angeles to Hong Kong flights
San Francisco to Singapore flights
Ontario to Taiwan Taoyuan Intl flights
San Francisco to Hyderabad flights
Los Angeles to Singapore flights
Los Angeles to Don Mueang Intl flights
San Francisco to Incheon Intl flights
Los Angeles to Gimpo Intl flights
Ontario to Manila flights
Los Angeles to Sung Shan flights
San Francisco to Pu Dong flights
Los Angeles to New Delhi flights
San Jose to Manila flights
San Diego to Haneda flights
San Francisco to Capital flights
San Jose to New Delhi flights
Los Angeles to Mumbai flights
Oakland to Manila flights
Burbank to Narita flights
Los Angeles to Soekarno-Hatta Intl flights
Burbank to Suvarnabhumi flights
San Francisco to Kansai Intl flights
Santa Ana to Narita flights
Burbank to Manila flights
Santa Ana to Suvarnabhumi flights

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 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$538Average$906FlexibilityNo cancel feeOn-time69%
Asiana AirlinesCheapest$640Average$793FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$714Average$1,083FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$769Average$908FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$791Average$1,216FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.