What is the cheapest airline that flies from Ontario to Vietnam?

Delta, Korean Air, and United Airlines are the most popular carriers operating from Ontario to Vietnam

What airlines fly to Vietnam?

Singapore Airlines, China Airlines and Cathay Pacific are the top three most popular airlines that fly to Vietnam from Ontario according to our data. Singapore Airlines is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Vietnam. Keep in mind that there are 22 different airlines that fly to Vietnam on a routine basis, so you have a few additional options to choose from.

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?

As of October 2026, there are 5 operators available to choose from 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.

$389 Cheap Flights from Ontario to Vietnam in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Vietnam

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:30 pm - 12:50 pmONT Ontario-SGN Ho Chi Minh City

30h 20m2 stops Seattle/Tacoma Intl Incheon Intl

2:05 pm - 1:57 pmSGN Ho Chi Minh City-ONT Ontario

38h 52m2 stops Incheon Intl Seattle/Tacoma Intl

$690Korean Air

Tue, Feb 9 - Tue, Feb 23

7:00 am - 10:25 pmONT Ontario-SGN Ho Chi Minh City

24h 25m2 stops Seattle/Tacoma Intl Incheon Intl

7:55 am - 1:57 pmSGN Ho Chi Minh City-ONT Ontario

21h 02m2 stops Incheon Intl Seattle/Tacoma Intl

$747Korean Air

Mon, Feb 1 - Mon, Feb 22

6:20 am - 11:50 pmONT Ontario-SGN Ho Chi Minh City

26h 30m2 stops Seattle/Tacoma Intl Incheon Intl

7:55 am - 5:16 pmSGN Ho Chi Minh City-ONT Ontario

24h 21m2 stops Incheon Intl Seattle/Tacoma Intl

$787Delta

Thu, Nov 5 - Tue, Nov 17

7:00 am - 10:25 pmONT Ontario-SGN Ho Chi Minh City

24h 25m2 stops Seattle/Tacoma Intl Incheon Intl

2:05 pm - 10:43 pmSGN Ho Chi Minh City-ONT Ontario

47h 38m2 stops Incheon Intl Seattle/Tacoma Intl

$787Delta

Mon, Feb 8 - Fri, Feb 26

7:00 am - 10:25 pmONT Ontario-SGN Ho Chi Minh City

24h 25m2 stops Seattle/Tacoma Intl Incheon Intl

11:40 pm - 4:24 pmSGN Ho Chi Minh City-ONT Ontario

31h 44m2 stops Incheon Intl Salt Lake City

$841Multiple Airlines

Sat, Nov 14 - Sun, Nov 29

6:20 am - 11:50 pmONT Ontario-SGN Ho Chi Minh City

27h 30m2 stops Seattle/Tacoma Intl Incheon Intl

11:40 pm - 4:28 pmSGN Ho Chi Minh City-ONT Ontario

31h 48m2 stops Incheon Intl Salt Lake City

$841Multiple Airlines

Fri, Oct 30 - Mon, Nov 30

10:50 pm - 10:00 amONT Ontario-SGN Ho Chi Minh City

20h 10m1 stop Taipei City Taiwan Taoyuan Intl

11:00 am - 5:05 pmSGN Ho Chi Minh City-ONT Ontario

21h 05m1 stop Taipei City Taiwan Taoyuan Intl

$919China Airlines

Sat, Feb 20 - Tue, Mar 2

10:50 pm - 4:15 pmONT Ontario-SGN Ho Chi Minh City

26h 25m1 stop Taipei City Taiwan Taoyuan Intl

11:00 am - 5:05 pmSGN Ho Chi Minh City-ONT Ontario

21h 05m1 stop Taipei City Taiwan Taoyuan Intl

$920China Airlines

Mon, Feb 22 - Fri, Mar 5

9:45 pm - 4:50 pmONT Ontario-SGN Ho Chi Minh City

28h 05m1 stop Taipei City Taiwan Taoyuan Intl

11:40 am - 3:55 pmSGN Ho Chi Minh City-ONT Ontario

19h 15m1 stop Taipei City Taiwan Taoyuan Intl

$940STARLUX Airlines

Mon, Feb 1 - Wed, Mar 3

9:45 pm - 4:50 pmONT Ontario-SGN Ho Chi Minh City

28h 05m1 stop Taipei City Taiwan Taoyuan Intl

11:40 am - 3:55 pmSGN Ho Chi Minh City-ONT Ontario

19h 15m1 stop Taipei City Taiwan Taoyuan Intl

$941STARLUX Airlines

Mon, Feb 1 - Wed, Mar 3

Cheap last minute flights

Enter your travel dates to find the best prices.

6:20 am - 9:40 pmONT Ontario-DAD Da Nang

25h 20m2 stops Seattle/Tacoma Intl Incheon Intl

11:00 pm - 5:16 pmDAD Da Nang-ONT Ontario

33h 16m2 stops Incheon Intl Seattle/Tacoma Intl

$787Korean Air

Sun, Oct 25 - Sun, Nov 8

6:20 am - 10:10 pmONT Ontario-SGN Ho Chi Minh City

25h 50m2 stops Seattle/Tacoma Intl Incheon Intl

7:55 am - 4:23 pmSGN Ho Chi Minh City-ONT Ontario

23h 28m2 stops Incheon Intl Salt Lake City

$787Delta

Fri, Oct 23 - Sat, Nov 7

6:20 am - 11:50 pmONT Ontario-SGN Ho Chi Minh City

27h 30m2 stops Seattle/Tacoma Intl Incheon Intl

7:55 am - 4:23 pmSGN Ho Chi Minh City-ONT Ontario

23h 28m2 stops Incheon Intl Salt Lake City

$787Delta

Sat, Oct 24 - Sat, Nov 7

6:00 pm - 12:35 pmONT Ontario-SGN Ho Chi Minh City

28h 35m2 stops Seattle/Tacoma Intl Incheon Intl

7:30 am - 10:43 pmSGN Ho Chi Minh City-ONT Ontario

29h 13m2 stops Incheon Intl Seattle/Tacoma Intl

$793Korean Air

Thu, Oct 22 - Tue, Mar 30

12:10 am - 4:20 pmONT Ontario-SGN Ho Chi Minh City

26h 10m1 stop Taipei City Taiwan Taoyuan Intl

11:00 am - 6:05 pmSGN Ho Chi Minh City-ONT Ontario

21h 05m1 stop Taipei City Taiwan Taoyuan Intl

$927China Airlines

Thu, Oct 22 - Fri, Oct 30

11:50 pm - 4:15 pmONT Ontario-SGN Ho Chi Minh City

26h 25m1 stop Taipei City Taiwan Taoyuan Intl

5:15 pm - 5:05 pmSGN Ho Chi Minh City-ONT Ontario

38h 50m1 stop Taipei City Taiwan Taoyuan Intl

$943China Airlines

Sun, Oct 25 - Sun, Nov 22

9:25 am - 12:15 amONT Ontario-SGN Ho Chi Minh City

24h 50m2 stops San Francisco Tokyo Narita

7:30 am - 3:33 pmSGN Ho Chi Minh City-ONT Ontario

22h 03m2 stops Tokyo Narita San Francisco

$947United Airlines

Thu, Oct 22 - Thu, Oct 29

6:00 am - 12:15 amONT Ontario-SGN Ho Chi Minh City

28h 15m2 stops San Francisco Tokyo Narita

7:30 am - 12:29 pmSGN Ho Chi Minh City-ONT Ontario

19h 59m2 stops Tokyo Narita San Francisco

$947United Airlines

Sun, Oct 25 - Tue, Nov 10

7:34 pm - 10:15 amONT Ontario-SGN Ho Chi Minh City

24h 41m2 stops Phoenix Sky Harbor Intl Taipei City Taiwan Taoyuan Intl

6:05 pm - 5:05 pmSGN Ho Chi Minh City-ONT Ontario

37h 00m1 stop Taipei City Taiwan Taoyuan Intl

$1,107STARLUX Airlines

Thu, Oct 22 - Tue, Mar 30

7:34 pm - 10:15 amONT Ontario-SGN Ho Chi Minh City

24h 41m2 stops Phoenix Sky Harbor Intl Taipei City Taiwan Taoyuan Intl

6:05 pm - 5:05 pmSGN Ho Chi Minh City-ONT Ontario

37h 00m1 stop Taipei City Taiwan Taoyuan Intl

$1,108STARLUX Airlines

Thu, Oct 22 - Tue, Mar 30

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Delta flights from Ontario to Vietnam

Our best Delta deals on Ontario to Vietnam flight tickets

Delta

Oct 29

ONT6:20 amOntario

26h 05m

2 stops

SGN10:25 pmHo Chi Minh City

Nov 11

SGN7:55 amHo Chi Minh City

23h 29m

2 stops

ONT4:24 pmOntario

$787

Delta

Oct 31

ONT6:20 amOntario

27h 30m

2 stops

SGN11:50 pmHo Chi Minh City

Nov 17

SGN7:55 amHo Chi Minh City

24h 21m

2 stops

ONT5:16 pmOntario

$788

Delta

Jan 20

ONT7:00 amOntario

23h 45m

2 stops

HAN9:45 pmHanoi Noibai

Mar 15

HAN11:05 pmHanoi Noibai

32h 12m

2 stops

ONT5:17 pmOntario

$792

Korean Air flights from Ontario to Vietnam

Our best Korean Air deals on Ontario to Vietnam flight tickets

Korean Air

Feb 9

ONT3:30 pmOntario

30h 20m

2 stops

SGN12:50 pmHo Chi Minh City

Feb 23

SGN2:05 pmHo Chi Minh City

38h 52m

2 stops

ONT1:57 pmOntario

$690

Korean Air

Feb 1

ONT7:00 amOntario

24h 25m

2 stops

SGN10:25 pmHo Chi Minh City

Feb 25

SGN7:55 amHo Chi Minh City

21h 02m

2 stops

ONT1:57 pmOntario

$747

Korean Air

Feb 23

ONT3:30 pmOntario

30h 20m

2 stops

SGN12:50 pmHo Chi Minh City

Mar 20

SGN7:55 amHo Chi Minh City

23h 22m

2 stops

ONT5:17 pmOntario

$756

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Tue 2/9

3:30 pm-12:50 pm

2 stops30h 20m

Ho Chi Minh City

Tue 2/23

2:05 pm-1:57 pm

2 stops38h 52m

$690

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Mon 2/1

7:00 am-10:25 pm

2 stops24h 25m

Ho Chi Minh City

Mon 2/22

7:55 am-1:57 pm

2 stops21h 02m

$747

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Thu 11/5

6:20 am-11:50 pm

2 stops26h 30m

Ho Chi Minh City

Tue 11/17

7:55 am-5:16 pm

2 stops24h 21m

$787

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Mon 2/8

7:00 am-10:25 pm

2 stops24h 25m

Ho Chi Minh City

Fri 2/26

2:05 pm-10:43 pm

2 stops47h 38m

$787

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Sat 11/14

7:00 am-10:25 pm

2 stops24h 25m

Ho Chi Minh City

Sun 11/29

11:40 pm-4:24 pm

2 stops31h 44m

$841

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Fri 10/30

6:20 am-11:50 pm

2 stops27h 30m

Ho Chi Minh City

Mon 11/30

11:40 pm-4:28 pm

2 stops31h 48m

$841

Quickest round-trip

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Sat 2/20

10:50 pm-10:00 am

1 stop20h 10m

Ho Chi Minh City

Tue 3/2

11:00 am-5:05 pm

1 stop21h 05m

$919

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Mon 2/22

10:50 pm-4:15 pm

1 stop26h 25m

Ho Chi Minh City

Fri 3/5

11:00 am-5:05 pm

1 stop21h 05m

$920

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Mon 2/1

9:45 pm-4:50 pm

1 stop28h 05m

Ho Chi Minh City

Wed 3/3

11:40 am-3:55 pm

1 stop19h 15m

$940

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Mon 2/1

9:45 pm-4:50 pm

1 stop28h 05m

Ho Chi Minh City

Wed 3/3

11:40 am-3:55 pm

1 stop19h 15m

$941

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

What is the cheapest month to fly to Vietnam?

The month of March is, on average, the cheapest month to fly to Vietnam from Ontario, with most prices found around $753. If you don’t want to visit Vietnam in March, then you should wait until April to fly from Ontario, when ticket prices are also cheap, with an average price of $780.

How far in advance should I book a flight from Ontario 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 $961 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 $796 on momondo.

Can stopping save me money on Ontario to Vietnam flights?

You could potentially save up to 18% 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

Best Price Found	$389
Fastest flight time	19h 25m
Direct flights	None

The best one-way flight to Vietnam from Ontario in the past 72 hours is $389. The best round-trip flight deal from Ontario to Vietnam found on momondo in the last 72 hours is $690.

The fastest flight from Ontario to Vietnam takes 19h 25m

There are no direct flights from Ontario to Vietnam. There are no popular flight routes from Ontario to Vietnam.

Search flight deals

Frequently asked questions about flying from Ontario to Vietnam

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?
As of October 2026, there are 5 operators available to choose from 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
Korean Air	PriceFrom $611	Free Cancellation	Rating 8.4 1,218 reviews	Search Korean Air flights
Delta	PriceFrom $656	Free Cancellation	Rating 7.8 8,651 reviews	Search Delta flights
China Airlines	PriceFrom $688	Free Cancellation	Rating 8.3 851 reviews	Search China Airlines flights
Asiana Airlines	PriceFrom $735	Free Cancellation	Rating 8.1 567 reviews	Search Asiana Airlines flights
STARLUX Airlines	PriceFrom $743	Free Cancellation	Rating 8.7 400 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.