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

Delta, Korean Air, and China 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 35% 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 November 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.

$383 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 - 5:17 pmSGN Ho Chi Minh City-ONT Ontario

23h 22m2 stops Incheon Intl Seattle/Tacoma Intl

$747Korean Air

Sun, Feb 21 - Sun, Mar 21

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

25h 50m2 stops Seattle/Tacoma Intl Incheon Intl

11:40 pm - 2:50 pmSGN Ho Chi Minh City-ONT Ontario

30h 10m2 stops Incheon Intl Seattle/Tacoma Intl

$760Korean Air

Tue, Jan 5 - Thu, Jan 14

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

39h 50m2 stops Salt Lake City Incheon Intl

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

47h 38m2 stops Incheon Intl Seattle/Tacoma Intl

$778Delta

Thu, Jan 21 - Sun, Feb 21

7:00 am - 12:50 pmONT Ontario-SGN Ho Chi Minh City

38h 50m2 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

$778Delta

Tue, Jan 19 - Fri, Feb 19

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

26h 25m1 stop Taipei City Taiwan Taoyuan Intl

11:20 am - 6:00 pmSGN Ho Chi Minh City-ONT Ontario

20h 40m1 stop Taichung City ChingChuanKang

$851Multiple Airlines

Mon, Mar 1 - Sun, May 2

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

26h 25m1 stop Taipei City Taiwan Taoyuan Intl

11:20 am - 6:00 pmSGN Ho Chi Minh City-ONT Ontario

20h 40m1 stop Taichung City ChingChuanKang

$851Multiple Airlines

Sat, Feb 27 - Tue, Apr 13

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

26h 10m1 stop Taipei City Taiwan Taoyuan Intl

5:30 pm - 6:00 pmSGN Ho Chi Minh City-ONT Ontario

38h 30m1 stop Taipei City Taiwan Taoyuan Intl

$876China Airlines

Mon, Apr 5 - Tue, Apr 27

10:50 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

$876China Airlines

Sat, Jan 9 - Sat, Jan 23

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

28h 05m1 stop Taipei City Taiwan Taoyuan Intl

6:00 pm - 3:55 pmSGN Ho Chi Minh City-ONT Ontario

36h 55m1 stop Taipei City Taiwan Taoyuan Intl

$952STARLUX Airlines

Wed, Jan 13 - Tue, Feb 23

10:45 pm - 4:50 pmONT Ontario-SGN Ho Chi Minh City

28h 05m1 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

$952STARLUX Airlines

Mon, Mar 15 - Wed, Apr 14

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 am - 9:40 pmONT Ontario-DAD Da Nang

24h 40m2 stops Salt Lake City Incheon Intl

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

39h 00m2 stops Incheon Intl Seattle/Tacoma Intl

$788Delta

Sun, Nov 8 - Mon, Nov 16

6:00 am - 9:40 pmONT Ontario-DAD Da Nang

24h 40m2 stops Salt Lake City Incheon Intl

11:00 pm - 11:49 pmDAD Da Nang-ONT Ontario

39h 49m2 stops Incheon Intl Salt Lake City

$788Delta

Mon, Nov 9 - Mon, Nov 16

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

26h 30m2 stops Seattle/Tacoma Intl Incheon Intl

11:40 pm - 5:16 pmSGN Ho Chi Minh City-ONT Ontario

32h 36m2 stops Incheon Intl Seattle/Tacoma Intl

$841Multiple Airlines

Sun, Nov 8 - Sun, Nov 15

6:20 am - 10:25 pmONT Ontario-SGN Ho Chi Minh City

25h 05m2 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

$899Korean Air

Wed, Nov 4 - Mon, Nov 16

6:20 am - 10:25 pmONT Ontario-SGN Ho Chi Minh City

25h 05m2 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

$899Korean Air

Wed, Nov 4 - Fri, Nov 13

10:50 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

$921China Airlines

Mon, Nov 9 - Tue, Nov 24

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

$923China Airlines

Sun, Nov 8 - Sat, Dec 12

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

27h 15m2 stops San Francisco Tokyo Narita

7:30 am - 3:35 pmSGN Ho Chi Minh City-ONT Ontario

23h 05m2 stops Tokyo Narita San Francisco

$947United Airlines

Mon, Nov 9 - Mon, Dec 7

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

28h 05m1 stop Taipei City Taiwan Taoyuan Intl

6:00 pm - 3:55 pmSGN Ho Chi Minh City-ONT Ontario

36h 55m1 stop Taipei City Taiwan Taoyuan Intl

$974STARLUX Airlines

Mon, Nov 9 - Mon, Nov 30

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

28h 05m1 stop Taipei City Taiwan Taoyuan Intl

6:00 pm - 3:55 pmSGN Ho Chi Minh City-ONT Ontario

36h 55m1 stop Taipei City Taiwan Taoyuan Intl

$978STARLUX Airlines

Fri, Nov 6 - Thu, Nov 12

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Delta flights from Ontario to Vietnam

Our best Delta deals on Ontario to Vietnam flight tickets

Delta

Jan 25

ONT7:00 amOntario

38h 50m

2 stops

SGN12:50 pmHo Chi Minh City

Mar 7

SGN2:05 pmHo Chi Minh City

47h 38m

2 stops

ONT10:43 pmOntario

$778

Delta

Nov 6

ONT6:00 amOntario

24h 40m

2 stops

DAD9:40 pmDa Nang

Nov 13

DAD11:00 pmDa Nang

39h 00m

2 stops

ONT11:00 pmOntario

$788

Delta

Jan 31

ONT3:35 pmOntario

30h 15m

2 stops

SGN12:50 pmHo Chi Minh City

Feb 23

SGN2:05 pmHo Chi Minh City

39h 43m

2 stops

ONT2:48 pmOntario

$828

United Airlines flights from Ontario to Vietnam

Our best United Airlines deals on Ontario to Vietnam flight tickets

United Airlines

Nov 27

ONT6:00 amOntario

27h 15m

2 stops

SGN12:15 amHo Chi Minh City

Dec 26

SGN7:30 amHo Chi Minh City

22h 49m

2 stops

ONT3:19 pmOntario

$897

United Airlines

Nov 22

ONT6:00 amOntario

26h 10m

2 stops

SGN11:10 pmHo Chi Minh City

Dec 6

SGN11:30 pmHo Chi Minh City

36h 08m

2 stops

ONT8:38 pmOntario

$901

United Airlines

Nov 17

ONT9:25 amOntario

22h 45m

2 stops

SGN11:10 pmHo Chi Minh City

Dec 8

SGN7:30 amHo Chi Minh City

23h 05m

2 stops

ONT3:35 pmOntario

$902

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Sun 2/21

7:00 am-11:50 pm

2 stops25h 50m

Ho Chi Minh City

Sun 3/21

7:55 am-5:17 pm

2 stops23h 22m

$747

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Tue 1/5

7:00 am-11:50 pm

2 stops25h 50m

Ho Chi Minh City

Thu 1/14

11:40 pm-2:50 pm

2 stops30h 10m

$760

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Thu 1/21

6:00 am-12:50 pm

2 stops39h 50m

Ho Chi Minh City

Sun 2/21

2:05 pm-10:43 pm

2 stops47h 38m

$778

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Tue 1/19

7:00 am-12:50 pm

2 stops38h 50m

Ho Chi Minh City

Fri 2/19

2:05 pm-10:43 pm

2 stops47h 38m

$778

Quickest round-trip

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Mon 3/1

10:50 pm-4:15 pm

1 stop26h 25m

Ho Chi Minh City

Sun 5/2

11:20 am-6:00 pm

1 stop20h 40m

$851

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Sat 2/27

10:50 pm-4:15 pm

1 stop26h 25m

Ho Chi Minh City

Tue 4/13

11:20 am-6:00 pm

1 stop20h 40m

$851

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Mon 4/5

12:10 am-4:20 pm

1 stop26h 10m

Ho Chi Minh City

Tue 4/27

5:30 pm-6:00 pm

1 stop38h 30m

$876

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Sat 1/9

10:50 pm-4:15 pm

1 stop26h 25m

Ho Chi Minh City

Sat 1/23

5:15 pm-5:05 pm

1 stop38h 50m

$876

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Wed 1/13

9:45 pm-4:50 pm

1 stop28h 05m

Ho Chi Minh City

Tue 2/23

6:00 pm-3:55 pm

1 stop36h 55m

$952

OntarioHo Chi Minh City

ONT Ontario - SGN Ho Chi Minh City

ONTSGN

Ontario

Mon 3/15

10:45 pm-4:50 pm

1 stop28h 05m

Ho Chi Minh City

Wed 4/14

11:30 am-5:05 pm

1 stop19h 35m

$952

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 $759. 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 $971 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 $795 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	$383
Fastest flight time	19h 25m
Direct flights	None

The best one-way flight to Vietnam from Ontario in the past 72 hours is $383. 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 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 November 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 8,698 reviews	Search Delta flights
China Airlines	PriceFrom $689	Free Cancellation	Rating 8.3 854 reviews	Search China Airlines flights
Asiana Airlines	PriceFrom $735	Free Cancellation	Rating 8.1 570 reviews	Search Asiana Airlines flights
STARLUX Airlines	PriceFrom $743	Free Cancellation	Rating 8.8 410 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.