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

Delta and Korean Air 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 32% 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.

$399 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.

7:00 am - 11:50 pmONT Ontario-SGN Ho Chi Minh City

25h 50m2 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

Tue, Feb 2 - Mon, Feb 22

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

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

24h 25m2 stops Seattle/Tacoma Intl Incheon Intl

2:05 pm - 4:22 pmSGN Ho Chi Minh City-ONT Ontario

41h 17m2 stops Incheon Intl Salt Lake City

$788Delta

Tue, Nov 24 - Sat, Dec 12

6:00 am - 12:50 pmONT Ontario-SGN Ho Chi Minh City

39h 50m2 stops Salt Lake City Incheon Intl

7:55 am - 10:59 pmSGN Ho Chi Minh City-ONT Ontario

30h 04m2 stops Incheon Intl Seattle/Tacoma Intl

$788Delta

Sun, Nov 29 - Sun, Dec 6

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

24h 25m2 stops Seattle/Tacoma Intl Incheon Intl

7:30 am - 5:17 pmSGN Ho Chi Minh City-ONT Ontario

23h 47m2 stops Incheon Intl Seattle/Tacoma Intl

$841Multiple Airlines

Sun, Feb 14 - Wed, Mar 31

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

24h 25m2 stops Seattle/Tacoma Intl Incheon Intl

2:05 pm - 5:15 pmSGN Ho Chi Minh City-ONT Ontario

42h 10m2 stops Incheon Intl Seattle/Tacoma Intl

$841Multiple Airlines

Fri, Nov 13 - Mon, Nov 30

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

$926China Airlines

Tue, Jan 12 - Mon, Jan 25

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

$929China Airlines

Mon, Nov 23 - Mon, Dec 7

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

Wed, Feb 3 - 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

Tue, Feb 2 - Wed, Feb 24

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 am - 11:15 pmONT Ontario-SGN Ho Chi Minh City

27h 15m2 stops Salt Lake City Incheon Intl

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

24h 21m2 stops Incheon Intl Seattle/Tacoma Intl

$788Delta

Tue, Oct 20 - Tue, Nov 24

6:00 am - 11:15 pmONT Ontario-SGN Ho Chi Minh City

27h 15m2 stops Salt Lake City Incheon Intl

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

24h 21m2 stops Incheon Intl Seattle/Tacoma Intl

$788Delta

Tue, Oct 20 - Sun, Nov 22

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

25h 50m2 stops Seattle/Tacoma Intl Incheon Intl

11:35 pm - 5:12 pmSGN Ho Chi Minh City-ONT Ontario

31h 37m2 stops Incheon Intl Seattle/Tacoma Intl

$793Korean Air

Sun, Oct 18 - Wed, Oct 21

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

28h 35m2 stops Seattle/Tacoma Intl Incheon Intl

7:55 am - 11:00 pmSGN Ho Chi Minh City-ONT Ontario

30h 05m2 stops Incheon Intl Seattle/Tacoma Intl

$793Korean Air

Tue, Oct 20 - Tue, Nov 24

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

26h 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

$927China Airlines

Sun, Oct 18 - Mon, Nov 16

12:10 am - 9:40 amONT Ontario-SGN Ho Chi Minh City

19h 30m1 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

$930China Airlines

Sun, Oct 18 - Mon, Nov 9

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

24h 50m2 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

Mon, Oct 19 - Mon, Nov 9

8:03 am - 12:15 amONT Ontario-SGN Ho Chi Minh City

26h 12m2 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

Tue, Oct 20 - Tue, Oct 27

11:30 pm - 4:55 pmONT Ontario-SGN Ho Chi Minh City

27h 25m1 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

$979STARLUX Airlines

Mon, Oct 19 - Mon, Nov 16

11:30 pm - 10:15 amONT Ontario-SGN Ho Chi Minh City

20h 45m1 stop Taipei City Taiwan Taoyuan Intl

11:30 am - 5:05 pmSGN Ho Chi Minh City-ONT Ontario

19h 35m1 stop Taipei City Taiwan Taoyuan Intl

$1,021STARLUX Airlines

Sat, Oct 17 - Sat, Oct 24

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Korean Air flights from Ontario to Vietnam

Our best Korean Air deals on Ontario to Vietnam flight tickets

Korean Air

Jan 25

ONT3:30 pmOntario

30h 20m

2 stops

SGN12:50 pmHo Chi Minh City

Feb 22

SGN7:55 amHo Chi Minh City

29h 48m

2 stops

ONT10:43 pmOntario

$752

Korean Air

Jan 27

ONT7:00 amOntario

24h 25m

2 stops

SGN10:25 pmHo Chi Minh City

Feb 22

SGN7:55 amHo Chi Minh City

21h 02m

2 stops

ONT1:57 pmOntario

$758

Korean Air

Nov 23

ONT7:00 amOntario

24h 25m

2 stops

SGN10:25 pmHo Chi Minh City

Dec 7

SGN7:55 amHo Chi Minh City

24h 20m

2 stops

ONT5:15 pmOntario

$773

Delta flights from Ontario to Vietnam

Our best Delta deals on Ontario to Vietnam flight tickets

Delta

Nov 26

ONT7:00 amOntario

38h 50m

2 stops

SGN12:50 pmHo Chi Minh City

Dec 8

SGN11:40 pmHo Chi Minh City

38h 19m

2 stops

ONT10:59 pmOntario

$788

Delta

Nov 11

ONT11:57 amOntario

59h 18m

2 stops

DAD2:15 pmDa Nang

Nov 19

DAD3:45 pmDa Nang

46h 15m

2 stops

ONT11:00 pmOntario

$793

Delta

Mar 1

ONT7:00 amOntario

24h 25m

2 stops

SGN10:25 pmHo Chi Minh City

Mar 11

SGN7:55 amHo Chi Minh City

24h 22m

2 stops

ONT5:17 pmOntario

$798

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 2/2

7:00 am-11:50 pm

2 stops25h 50m

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

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

Tue 11/24

7:00 am-10:25 pm

2 stops24h 25m

Ho Chi Minh City

Sat 12/12

2:05 pm-4:22 pm

2 stops41h 17m

$788

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Sun 11/29

6:00 am-12:50 pm

2 stops39h 50m

Ho Chi Minh City

Sun 12/6

7:55 am-10:59 pm

2 stops30h 04m

$788

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Sun 2/14

7:00 am-10:25 pm

2 stops24h 25m

Ho Chi Minh City

Wed 3/31

7:30 am-5:17 pm

2 stops23h 47m

$841

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Fri 11/13

7:00 am-10:25 pm

2 stops24h 25m

Ho Chi Minh City

Mon 11/30

2:05 pm-5:15 pm

2 stops42h 10m

$841

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Tue 1/12

10:50 pm-4:15 pm

1 stop26h 25m

Ho Chi Minh City

Mon 1/25

11:00 am-5:05 pm

1 stop21h 05m

$926

Quickest round-trip

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Mon 11/23

10:50 pm-10:00 am

1 stop20h 10m

Ho Chi Minh City

Mon 12/7

11:00 am-5:05 pm

1 stop21h 05m

$929

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Wed 2/3

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

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Tue 2/2

9:45 pm-4:50 pm

1 stop28h 05m

Ho Chi Minh City

Wed 2/24

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 $743. If you don’t want to visit Vietnam in March, then you should wait until November 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 $957 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	$399
Fastest flight time	20h 10m
Direct flights	None

The best one-way flight to Vietnam from Ontario in the past 72 hours is $399. The best round-trip flight deal from Ontario to Vietnam found on momondo in the last 72 hours is $747.

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

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 8,650 reviews	Search Delta flights
China Airlines	PriceFrom $688	Free Cancellation	Rating 8.2 850 reviews	Search China Airlines flights
Asiana Airlines	PriceFrom $735	Free Cancellation	Rating 8.1 563 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.