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Cheap flights from Ontario to Vietnam from $312

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Vietnam departing on 2/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Vietnam

Cheap round-trip flights

Enter your travel dates to find the best prices.
Korean Air Logo
7:00 am - 10:40 am
ONT
-
HAN
37h 40m2 stops
Korean Air Logo
11:10 pm - 5:16 pm
HAN
-
ONT
32h 06m2 stops
$689Korean Air
Thu, May 14 - Thu, Jun 18
Korean Air Logo
7:30 am - 9:05 pm
ONT
-
DAD
23h 35m2 stops
Korean Air Logo
3:40 pm - 5:15 pm
DAD
-
ONT
39h 35m2 stops
$710Korean Air
Wed, Apr 22 - Wed, Apr 29
Korean Air Logo
6:00 am - 9:05 pm
ONT
-
DAD
25h 05m2 stops
Korean Air Logo
3:40 pm - 5:13 pm
DAD
-
ONT
39h 33m2 stops
$715Korean Air
Sun, Apr 5 - Thu, Apr 9
United Airlines Logo
6:00 am - 12:15 am
ONT
-
SGN
28h 15m2 stops
United Airlines Logo
7:00 am - 5:47 pm
SGN
-
ONT
24h 47m2 stops
$716United Airlines
Tue, Apr 21 - Tue, May 12
United Airlines Logo
6:00 am - 9:55 pm
ONT
-
SGN
25h 55m2 stops
United Airlines Logo
7:00 am - 5:47 pm
SGN
-
ONT
24h 47m2 stops
$718United Airlines
Sun, Apr 26 - Mon, May 11
China Airlines Logo
10:50 pm - 4:50 pm
ONT
-
SGN
27h 00m1 stop
China Airlines Logo
11:00 am - 5:50 pm
SGN
-
ONT
20h 50m1 stop
$719China Airlines
Tue, Feb 17 - Tue, Mar 10
China Airlines Logo
10:50 pm - 4:50 pm
ONT
-
SGN
27h 00m1 stop
China Airlines Logo
11:00 am - 4:50 pm
SGN
-
ONT
20h 50m1 stop
$725China Airlines
Mon, Jan 19 - Thu, Jan 29
Delta Logo
7:30 am - 9:30 pm
ONT
-
DAD
23h 00m2 stops
Delta Logo
11:20 pm - 10:34 pm
DAD
-
ONT
37h 14m2 stops
$755Delta
Sun, Mar 1 - Mon, Mar 23
Delta Logo
5:53 pm - 9:30 pm
ONT
-
DAD
37h 37m2 stops
Delta Logo
10:55 pm - 10:37 pm
DAD
-
ONT
37h 42m2 stops
$760Delta
Sat, Mar 21 - Wed, Apr 15
STARLUX Airlines Logo
11:10 pm - 4:50 pm
ONT
-
HAN
27h 40m1 stop
STARLUX Airlines Logo
11:10 am - 5:05 pm
HAN
-
ONT
19h 55m1 stop
$788STARLUX Airlines
Mon, May 11 - Mon, May 25

United Airlines flights from Ontario to Vietnam

Our best United Airlines deals on Ontario to Vietnam flight tickets
United Airlines
Apr 21
ONT6:00 amOntario
28h 15m
2 stops
SGN12:15 amHo Chi Minh City
May 12
SGN7:00 amHo Chi Minh City
24h 47m
2 stops
ONT5:47 pmOntario
$716
Find similar
United Airlines
Apr 26
ONT6:00 amOntario
25h 55m
2 stops
SGN9:55 pmHo Chi Minh City
May 11
SGN7:00 amHo Chi Minh City
24h 47m
2 stops
ONT5:47 pmOntario
$718
Find similar
United Airlines
Apr 28
ONT6:00 amOntario
25h 50m
2 stops
SGN9:50 pmHo Chi Minh City
May 26
SGN7:00 amHo Chi Minh City
24h 47m
2 stops
ONT5:47 pmOntario
$721
Find similar

Delta flights from Ontario to Vietnam

Our best Delta deals on Ontario to Vietnam flight tickets
Delta
Mar 1
ONT7:30 amOntario
24h 50m
2 stops
SGN11:20 pmHo Chi Minh City
Mar 31
SGN1:55 pmHo Chi Minh City
41h 18m
2 stops
ONT5:13 pmOntario
$735
Find similar
Delta
Mar 1
ONT7:30 amOntario
23h 00m
2 stops
DAD9:30 pmDa Nang
Mar 24
DAD11:20 pmDa Nang
31h 53m
2 stops
ONT5:13 pmOntario
$755
Find similar
Delta
Mar 21
ONT5:53 pmOntario
37h 37m
2 stops
DAD9:30 pmDa Nang
Apr 15
DAD10:55 pmDa Nang
37h 42m
2 stops
ONT10:37 pmOntario
$760
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated December 30, 2025.
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

Thu 5/14

7:00 am-10:40 am

2 stops37h 40m

Hanoi Noibai

Thu 6/18

11:10 pm-5:16 pm

2 stops32h 06m

$689

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Wed 4/22

7:30 am-9:05 pm

2 stops23h 35m

Da Nang

Wed 4/29

3:40 pm-5:15 pm

2 stops39h 35m

$710

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sun 4/5

6:00 am-9:05 pm

2 stops25h 05m

Da Nang

Thu 4/9

3:40 pm-5:13 pm

2 stops39h 33m

$715

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 4/21

6:00 am-12:15 am

2 stops28h 15m

Ho Chi Minh City

Tue 5/12

7:00 am-5:47 pm

2 stops24h 47m

$716

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Sun 4/26

6:00 am-9:55 pm

2 stops25h 55m

Ho Chi Minh City

Mon 5/11

7:00 am-5:47 pm

2 stops24h 47m

$718

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 2/17

10:50 pm-4:50 pm

1 stop27h 00m

Ho Chi Minh City

Tue 3/10

11:00 am-5:50 pm

1 stop20h 50m

$719

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Mon 1/19

10:50 pm-4:50 pm

1 stop27h 00m

Ho Chi Minh City

Thu 1/29

11:00 am-4:50 pm

1 stop20h 50m

$725

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sun 3/1

7:30 am-9:30 pm

2 stops23h 00m

Da Nang

Mon 3/23

11:20 pm-10:34 pm

2 stops37h 14m

$755

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sat 3/21

5:53 pm-9:30 pm

2 stops37h 37m

Da Nang

Wed 4/15

10:55 pm-10:37 pm

2 stops37h 42m

$760

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Mon 5/11

11:10 pm-4:50 pm

1 stop27h 40m

Hanoi Noibai

Mon 5/25

11:10 am-5:05 pm

1 stop19h 55m

$788

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Vietnam from

How to get the cheapest flight ticket from Ontario to Vietnam

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Vietnam?

The month of November is, on average, the cheapest month to fly to Vietnam from Ontario, with most prices found around $776. If you don’t want to visit Vietnam in November, then you should wait until October to fly from Ontario, when ticket prices are also cheap, with an average price of $784.

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

You are more likely to see cheaper flights to Vietnam from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Vietnam for around $998 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Vietnam from Ontario for as low as $791 on momondo.

Can stopping save me money on Ontario to Vietnam flights?

You could potentially save up to 3% on your flight if you consider stops on a Ontario to Vietnam flight.

Cheap Ontario to Vietnam flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Vietnam

Fastest flight time

20h 10m

Direct flights

None
The fastest flight from Ontario to Vietnam takes 20h 10m
There are no direct flights from Ontario to Vietnam. There are no popular flight routes from Ontario to Vietnam.
Search flight deals

  • When did momondo last update prices for flights from Ontario Airport to Vietnam?

    Prices for flights from Ontario Airport to Vietnam are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Vietnam?

  • How old do you have to be to fly from Ontario Airport to Vietnam?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Vietnam.

  • What documentation or ID do you need to fly to Vietnam?

    The required travel and health documents for your Vietnam trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Vietnam. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Ontario to Vietnam

Compare and see reviews for airlines that fly from Ontario to Vietnam with momondo
Airline
Rating
Free Cancellation
Price
Asiana AirlinesPriceFrom $640Free CancellationRating
8.2
502 reviews
Search Asiana Airlines flights
China AirlinesPriceFrom $700Free CancellationRating
8.3
796 reviews
Search China Airlines flights
Korean AirPriceFrom $710Free CancellationRating
8.4
1,184 reviews
Search Korean Air flights
STARLUX AirlinesPriceFrom $746Free CancellationRating
8.9
250 reviews
Search STARLUX Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Vietnam?

Finding the right flight to Vietnam from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Vietnam quick and easy, saving you time and money.

Can I find flights from Ontario to Vietnam with flexible booking policies on momondo?

momondo does allow users to show only those flights to Vietnam from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Vietnam?

Once all potential Ontario to Vietnam flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Vietnam right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Vietnam, momondo offers a useful price alert feature which will track prices for flights to Vietnam from Ontario and alert you when they change.

An easier way to manage your Vietnam trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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