How long is the flight from Ontario to Southeast Asia?

There are many flights that can get you from Ontario to Southeast Asia in 18h 25m. Fly via China Airlines, United Airlines, or Delta to get the fastest option. The distance from Ontario to Southeast Asia is about 7327 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines to fly from Ontario to Southeast Asia one-way?

To fly one-way, consider booking your trip with Korean Air, which is currently one of the cheapest options available, starting at $363. China Airlines flights start at $378 while deals on United Airlines start at $393 one-way.

In terms of precipitation, rainfall in Southeast Asia ranges from 0.4 - 15.7 inches per month. July is typically the wettest month, when rainfall can reach 15.7 in. February is typically the driest time to visit Southeast Asia when rainfall is around 0.4 in.

If weather is an important factor for your trip to Southeast Asia, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

What are the most popular routes from Ontario to Southeast Asia?

When deciding which route to take from Ontario to Southeast Asia consider Ontario - Bangkok Suvarnabhumi, Ontario - Manila Ninoy Aquino Intl or Ontario - Ho Chi Minh City as they are the most popular.

What are the most popular airlines that fly from Ontario to Southeast Asia?

Before booking your flight from Ontario to Southeast Asia check out the most popular airlines for this route: China Airlines, STARLUX Airlines or Korean Air.

What airport do you fly from for flights from Ontario to Southeast Asia?

For a flight from Ontario to Southeast Asia, you will be flying from Ontario. Ontario (ONT) is just 3.1 mi from the center of the city.

Can I find deals for flights from Ontario to Southeast Asia that include hotel bookings?

Yes. In addition to deals on Ontario to Southeast Asia flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to Southeast Asia?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Southeast Asia.

Can I find deals for business class flights from Ontario to Southeast Asia?

Yes. Cheapflights offers flight deals from Ontario to Southeast Asia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$297+ Flights from Ontario to Southeast Asia

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Cheap flight deals from Ontario to Southeast Asia

Cheapest flights from Ontario to Southeast Asia
Explore the most affordable flight options available from Ontario to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

Thu 12/2510:42 amONT - SGN

2 stops44h 08mUnited Airlines

Tue 1/611:05 pmSGN - ONT

2 stops33h 38mUnited Airlines

Deal found 12/22

$720

Wed 12/316:38 amONT - SGN

2 stops39h 12mKorean Air

Wed 1/2111:50 pmSGN - ONT

2 stops29h 06mKorean Air

Deal found 12/22

$743

Tue 12/3010:42 amONT - SGN

2 stops45h 13mUnited Airlines

Wed 1/76:00 amSGN - ONT

2 stops20h 18mUnited Airlines

Deal found 12/22

$748

Wed 12/3110:42 amONT - MNL

1 stop28h 08mUnited Airlines

Sun 1/189:55 amMNL - ONT

1 stop17h 23mUnited Airlines

Deal found 12/21

$781

Fri 12/2610:42 amONT - SIN

1 stop41h 33mUnited Airlines

Mon 12/2910:10 amSIN - ONT

1 stop23h 33mUnited Airlines

Deal found 12/22

$790

Tue 12/306:39 pmONT - BKK

2 stops49h 46mUnited Airlines

Wed 1/214:55 pmBKK - ONT

2 stops20h 58mUnited Airlines

Deal found 12/22

$865

Tue 12/306:38 amONT - SGN

2 stops25h 42mDelta

Tue 1/278:00 amSGN - ONT

2 stops29h 51mDelta

Deal found 12/22

$869

Mon 12/296:39 pmONT - SIN

1 stop21h 21mUnited Airlines

Mon 1/1210:10 amSIN - ONT

1 stop23h 33mUnited Airlines

Deal found 12/21

$873

Tue 12/305:49 pmONT - SGN

2 stops37h 36mDelta

Tue 2/311:50 pmSGN - ONT

2 stops37h 54mDelta

Deal found 12/21

$874

Fri 12/266:39 pmONT - SIN

1 stop33h 36mUnited Airlines

Wed 12/3110:10 amSIN - ONT

1 stop39h 51mUnited Airlines

Deal found 12/22

$885

Thu 12/251:40 pmONT - SIN

2 stops62h 35mUnited Airlines

Wed 12/3110:10 amSIN - ONT

1 stop28h 23mUnited Airlines

Deal found 12/22

$896

Tue 12/3010:50 pmONT - MNL

1 stop25h 05mChina Airlines

Sat 2/2810:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 12/21

$910

Best flights from Ontario to Southeast Asia
Discover carefully curated flight deals from Ontario to Southeast Asia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 23, 2025.

Sun 3/2912:10 amONT - MNL

1 stop18h 25mChina Airlines

Wed 4/294:50 pmMNL - ONT

1 stop16h 10mChina Airlines

Deal found 12/21

$724

Sat 2/281:53 pmONT - CGK

2 stops49h 07mUnited Airlines

Wed 3/49:45 pmCGK - ONT

2 stops40h 12mUnited Airlines

Deal found 12/21

$725

Mon 3/166:00 amONT - SGN

2 stops27h 20mDelta

Sun 4/121:55 pmSGN - ONT

2 stops41h 20mDelta

Deal found 12/23

$735

Wed 1/149:45 pmONT - CEB

1 stop28h 50mSTARLUX Airlines

Wed 1/2810:50 amCEB - ONT

1 stop21h 00mSTARLUX Airlines

Deal found 12/23

$750

Thu 4/307:30 amONT - CEB

2 stops25h 00mKorean Air

Tue 6/161:00 amCEB - ONT

2 stops31h 16mKorean Air

Deal found 12/21

$769

Sat 1/317:30 amONT - CEB

2 stops22h 50mMultiple Airlines

Sun 2/812:15 amCEB - ONT

2 stops29h 41mMultiple Airlines

Deal found 12/22

$776

Wed 1/2811:53 amONT - CRK

2 stops31h 07mEVA Air

Fri 3/2712:05 pmCRK - ONT

2 stops26h 54mEVA Air

Deal found 12/22

$999

Tue 1/2010:50 pmONT - MNL

1 stop19h 05mChina Airlines

Mon 2/164:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 12/20

$724

Mon 2/21:53 pmONT - CGK

2 stops43h 02mUnited Airlines

Tue 3/316:10 amCGK - ONT

2 stops28h 26mUnited Airlines

Deal found 12/22

$726

Sat 3/285:53 pmONT - BKK

2 stops37h 52mDelta

Thu 4/169:50 amBKK - ONT

2 stops21h 25mDelta

Deal found 12/22

$751

Wed 2/49:45 pmONT - CEB

1 stop28h 50mSTARLUX Airlines

Sun 2/157:35 pmCEB - ONT

1 stop36h 15mSTARLUX Airlines

Deal found 12/22

$751

Fri 1/307:30 amONT - CEB

2 stops22h 50mKorean Air

Sun 2/812:15 amCEB - ONT

2 stops29h 41mKorean Air

Deal found 12/22

$777

Sun 3/2912:10 amONT - MNL

1 stop24h 40mChina Airlines

Tue 4/284:50 pmMNL - ONT

1 stop16h 10mChina Airlines

Deal found 12/21

$724

Sat 4/116:00 amONT - KUL

2 stops40h 50mUnited Airlines

Sun 4/262:15 pmKUL - ONT

2 stops42h 32mUnited Airlines

Deal found 12/21

$729

Wed 1/284:03 pmONT - CRK

2 stops24h 57mMultiple Airlines

Mon 3/910:00 amCRK - ONT

1 stop21h 50mMultiple Airlines

Deal found 12/22

$846

Tue 2/37:30 amONT - CEB

2 stops22h 50mKorean Air

Fri 2/1312:15 amCEB - ONT

2 stops38h 22mKorean Air

Deal found 12/22

$777

Sat 1/1710:50 pmONT - MNL

1 stop35h 40mChina Airlines

Tue 2/1710:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 12/20

$724

Wed 3/46:09 amONT - SGN

2 stops24h 41mUnited Airlines

Wed 3/186:00 amSGN - ONT

2 stops30h 57mUnited Airlines

Deal found 12/22

$730

Mon 3/236:00 amONT - DPS

2 stops26h 55mDelta

Mon 3/301:10 amDPS - ONT

2 stops31h 03mDelta

Deal found 12/21

$817

Wed 1/289:45 pmONT - CRK

1 stop19h 15mSTARLUX Airlines

Mon 3/910:00 amCRK - ONT

1 stop21h 50mSTARLUX Airlines

Deal found 12/21

$837

Tue 3/246:00 amONT - HAN

2 stops39h 10mKorean Air

Sun 4/1211:10 pmHAN - ONT

2 stops32h 05mKorean Air

Deal found 12/20

$787

Sun 1/1810:50 pmONT - MNL

1 stop25h 05mChina Airlines

Tue 2/1710:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 12/20

$724

Sun 4/1211:05 amONT - SGN

2 stops44h 50mUnited Airlines

Wed 4/227:00 amSGN - ONT

2 stops29h 45mUnited Airlines

Deal found 12/21

$735

Thu 3/126:00 amONT - DPS

2 stops26h 55mDelta

Wed 3/251:20 amDPS - ONT

2 stops36h 14mDelta

Deal found 12/21

$817

Wed 3/44:02 pmONT - CRK

2 stops24h 58mMultiple Airlines

Fri 3/2010:00 amCRK - ONT

1 stop21h 50mMultiple Airlines

Deal found 12/20

$915

Mon 5/184:03 pmONT - CRK

2 stops27h 57mEVA Air

Mon 6/112:00 pmCRK - ONT

2 stops26h 58mEVA Air

Deal found 12/20

$1,022

Tue 3/3112:10 amONT - MNL

1 stop24h 40mChina Airlines

Mon 4/274:50 pmMNL - ONT

1 stop16h 10mChina Airlines

Deal found 12/21

$724

Thu 4/96:00 amONT - SGN

2 stops25h 50mUnited Airlines

Thu 4/167:00 amSGN - ONT

2 stops24h 47mUnited Airlines

Deal found 12/22

$738

Mon 3/96:00 amONT - DPS

2 stops26h 55mDelta

Mon 3/231:20 amDPS - ONT

2 stops36h 14mDelta

Deal found 12/21

$817

Wed 1/217:30 amONT - CGK

2 stops45h 50mMultiple Airlines

Sun 1/259:50 pmCGK - ONT

2 stops31h 06mMultiple Airlines

Deal found 12/21

$923

Last-minute flights from Ontario to Southeast Asia
Discover last-minute flight deals from Ontario to Southeast Asia. Data last updated December 23, 2025 and is based on user searches.

Tue 1/1310:50 pmONT - MNL

1 stop25h 05mChina Airlines

Sat 2/710:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 12/22

$701

Tue 1/1310:50 pmONT - SGN

1 stop27h 00mChina Airlines

Fri 1/2311:00 amSGN - ONT

1 stop20h 50mChina Airlines

Deal found 12/21

$703

Wed 1/1410:50 pmONT - MNL

1 stop25h 05mChina Airlines

Mon 2/910:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 12/21

$670

Wed 1/1410:50 pmONT - MNL

1 stop19h 05mChina Airlines

Wed 1/2110:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 12/21

$703

Thu 1/1510:50 pmONT - MNL

1 stop25h 05mChina Airlines

Mon 3/23:35 amMNL - ONT

1 stop29h 15mChina Airlines

Deal found 12/21

$691

Sat 1/1710:50 pmONT - MNL

1 stop19h 05mChina Airlines

Tue 2/104:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 12/22

$706

Sun 1/1810:50 pmONT - MNL

1 stop25h 05mChina Airlines

Wed 2/184:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 12/23

$686

Mon 1/1910:50 pmONT - MNL

1 stop25h 05mChina Airlines

Mon 1/2610:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 12/23

$687

Tue 1/2010:50 pmONT - MNL

1 stop19h 05mChina Airlines

Tue 1/2710:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 12/21

$685

Wed 1/2110:50 pmONT - MNL

1 stop25h 05mChina Airlines

Mon 2/210:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 12/22

$692

Thu 1/2210:50 pmONT - MNL

1 stop19h 05mChina Airlines

Mon 1/263:35 amMNL - ONT

1 stop29h 15mChina Airlines

Deal found 12/21

$693

Thu 1/2910:50 pmONT - MNL

1 stop19h 05mChina Airlines

Tue 2/104:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 12/23

$697

One-way flights from Ontario to Southeast Asia
Search for one-way flight options from Ontario to Southeast Asia. Find affordable one-way fares based on user searches. Data last updated December 23, 2025.

Wed 4/86:00 amONT - BKK

2 stops25h 45mKorean Air

Deal found 12/21

$297

Mon 3/26:00 amONT - SGN

2 stops26h 20mDelta

Deal found 12/22

$312

Tue 2/37:30 amONT - BKK

2 stops24h 50mDelta

Deal found 12/22

$313

Thu 3/126:00 amONT - SGN

2 stops27h 20mKorean Air

Deal found 12/23

$314

Wed 3/256:00 amONT - BKK

2 stops25h 30mKorean Air

Deal found 12/22

$316

Mon 2/236:00 amONT - SIN

2 stops46h 25mDelta

Deal found 12/22

$322

Tue 2/33:30 pmONT - SGN

2 stops54h 20mDelta

Deal found 12/21

$324

Tue 3/106:00 amONT - SIN

2 stops27h 10mKorean Air

Deal found 12/22

$324

Sun 3/291:20 pmONT - BKK

2 stops44h 20mDelta

Deal found 12/22

$325

Tue 3/176:00 amONT - HAN

2 stops25h 45mKorean Air

Deal found 12/21

$327

Mon 3/166:00 amONT - HAN

2 stops25h 45mKorean Air

Deal found 12/21

$332

Wed 2/47:30 amONT - SGN

2 stops38h 20mKorean Air

Deal found 12/22

$333

Find flight deals from Ontario to Southeast Asia

Most accurate provider	Justfly.com 3 stars
Most trusted provider	Justfly.com 3 stars
Round-trip from	$648 (Delta)
One-way from	$297 (SmartFares)
Popular in	December
Cheapest in	September
Average price	$1,348

Provider with most accurate pricing for Los Angeles-Manila Ninoy Aquino Intl flight deals.

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From Ontario to Southeast Asia

Search Deals

One-way flight from Ontario to Southeast Asia

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($68 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Southeast Asia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioManila

ONT - MNL

ONTMNL

Ontario

Sun 3/29

12:10 am-9:35 am

1 stop18h 25m

Manila Ninoy Aquino Intl

Wed 4/29

4:50 pm-6:00 pm

1 stop16h 10m

$724

OntarioManila

ONT - MNL

ONTMNL

Ontario

Tue 1/20

10:50 pm-9:55 am

1 stop19h 05m

Manila Ninoy Aquino Intl

Mon 2/16

4:55 pm-4:50 pm

1 stop15h 55m

$724

OntarioManila

ONT - MNL

ONTMNL

Ontario

Sun 3/29

12:10 am-3:50 pm

1 stop24h 40m

Manila Ninoy Aquino Intl

Tue 4/28

4:50 pm-6:00 pm

1 stop16h 10m

$724

OntarioManila

ONT - MNL

ONTMNL

Ontario

Sat 1/17

10:50 pm-2:30 am

1 stop35h 40m

Manila Ninoy Aquino Intl

Tue 2/17

10:55 am-4:50 pm

1 stop21h 55m

$724

OntarioManila

ONT - MNL

ONTMNL

Ontario

Sun 1/18

10:50 pm-3:55 pm

1 stop25h 05m

Manila Ninoy Aquino Intl

Tue 2/17

10:55 am-4:50 pm

1 stop21h 55m

$724

OntarioManila

ONT - MNL

ONTMNL

Ontario

Tue 3/31

12:10 am-3:50 pm

1 stop24h 40m

Manila Ninoy Aquino Intl

Mon 4/27

4:50 pm-6:00 pm

1 stop16h 10m

$724

OntarioJakarta

ONT - CGK

ONTCGK

Ontario

Sat 2/28

1:53 pm-6:00 am

2 stops49h 07m

Jakarta Soekarno-Hatta Intl

Wed 3/4

9:45 pm-10:57 pm

2 stops40h 12m

$725

OntarioJakarta

ONT - CGK

ONTCGK

Ontario

Mon 2/2

1:53 pm-11:55 pm

2 stops43h 02m

Jakarta Soekarno-Hatta Intl

Tue 3/31

6:10 am-8:36 pm

2 stops28h 26m

$726

OntarioKuala Lumpur

ONT - KUL

ONTKUL

Ontario

Sat 4/11

6:00 am-1:50 pm

2 stops40h 50m

Kuala Lumpur Intl

Sun 4/26

2:15 pm-5:47 pm

2 stops42h 32m

$729

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Wed 3/4

6:09 am-9:50 pm

2 stops24h 41m

Ho Chi Minh City

Wed 3/18

6:00 am-10:57 pm

2 stops30h 57m

$730

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

Showing 1-10 of 60 results

...

Best time to book a flight from Ontario to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia 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 Southeast Asia

What is the cheapest month to book a flight from Ontario to Southeast Asia?

Currently, April is the cheapest month in which you can book a flight from Ontario to Southeast Asia (average of $59). Flying from Ontario to Southeast Asia in June is currently the most expensive (average of $748). 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 YJX?

When flying from Ontario to Southeast Asia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 19% versus a flight in the afternoon.

What is the cheapest day to fly from Ontario to Southeast Asia?

Travelers seeking maximum savings on their Ontario to Southeast Asia flight should consider departing on Wednesday at noon when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Southeast Asia

Read reviews from past customers who have flown STARLUX Airlines, Korean Air, and China Airlines from Ontario to Southeast Asia. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

STARLUX Airlines

8.9

Very good

248 reviews

Reviews

1 / 9

10.0

Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

STARLUX Airlines

8.9

Very good

248 reviews

STARLUX Airlines

8.9

Very good

248 reviews

Reviews

1 / 9

10.0

Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Korean Air

8.4

Very good

1,185 reviews

STARLUX Airlines

8.9

Very good

248 reviews

Reviews

1 / 9

10.0

Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

China Airlines

8.3

Very good

792 reviews

STARLUX Airlines

8.9

Very good

248 reviews

Reviews

1 / 9

10.0

Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Asiana Airlines

8.2

Very good

499 reviews

STARLUX Airlines

8.9

Very good

248 reviews

Reviews

1 / 9

10.0

Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

United Airlines

7.4

Good

9,109 reviews

STARLUX Airlines

8.9

Very good

248 reviews

Reviews

1 / 9

10.0

Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Related info for your journey

What airport do you fly from for flights from Ontario to Southeast Asia?
For a flight from Ontario to Southeast Asia, you will be flying from Ontario. Ontario (ONT) is just 3.1 mi from the center of the city.
How long is the flight from Ontario to Southeast Asia?
There are many flights that can get you from Ontario to Southeast Asia in 18h 25m. Fly via China Airlines, United Airlines, or Delta to get the fastest option. The distance from Ontario to Southeast Asia is about 7327 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines to fly from Ontario to Southeast Asia one-way?
To fly one-way, consider booking your trip with Korean Air, which is currently one of the cheapest options available, starting at $363. China Airlines flights start at $378 while deals on United Airlines start at $393 one-way.
What are the most popular routes from Ontario to Southeast Asia?
When deciding which route to take from Ontario to Southeast Asia consider Ontario - Bangkok Suvarnabhumi, Ontario - Manila Ninoy Aquino Intl or Ontario - Ho Chi Minh City as they are the most popular.
Can I find deals for flights from Ontario to Southeast Asia that include hotel bookings?
Yes. In addition to deals on Ontario to Southeast Asia flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Southeast Asia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Southeast Asia.
Can I find deals for business class flights from Ontario to Southeast Asia?
Yes. Cheapflights offers flight deals from Ontario to Southeast Asia 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 Southeast Asia?
Currently, April is the cheapest month in which you can book a flight from Ontario to Southeast Asia (average of $59). Flying from Ontario to Southeast Asia in June is currently the most expensive (average of $748). 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

Top 6 airlines flying from Ontario to Southeast Asia

Airline	Cheapest	Average	Flexibility	On-time
Korean Air	Cheapest$637	Average$808	FlexibilityNo cancel fee	On-time81%
Asiana Airlines	Cheapest$640	Average$805	FlexibilityNo cancel fee	On-time76%
STARLUX Airlines	Cheapest$658	Average$1,195	FlexibilityNo cancel fee	On-timeN/A
China Airlines	Cheapest$664	Average$959	FlexibilityNo cancel fee	On-time70%
United Airlines	Cheapest$677	Average$1,166	FlexibilityNo cancel fee	On-time69%
Philippine Airlines	Cheapest$754	Average$956	FlexibilityNo cancel fee	On-time60%

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$297+ Cheap flights from Ontario (ONT) to Southeast Asia

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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Southeast Asia with Cheapflights

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Cheap flight deals from Ontario to Southeast Asia

Cheapest flights from Ontario to Southeast AsiaExplore the most affordable flight options available from Ontario to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

Explore the most affordable flight options available from Ontario to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

Find flight deals from Ontario to Southeast Asia

Keep the following information in mind while searching for Ontario to Southeast Asia flight deals. Data was last updated December 23, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Southeast Asia that are best for you.

Best time to book a flight from Ontario to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Southeast Asia

What is the cheapest month to book a flight from Ontario to Southeast Asia?

What is the cheapest time of day to fly from ONT to YJX?

Find hourly flight availability from Ontario to Southeast Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 23, 2025.

What is the cheapest day to fly from Ontario to Southeast Asia?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Southeast Asia. Price data was last updated on December 16, 2024.

Reviews of airlines servicing Southeast Asia

Read reviews from past customers who have flown STARLUX Airlines, Korean Air, and China Airlines from Ontario to Southeast Asia. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Southeast Asia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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What are the cheapest airlines to fly from Ontario to Southeast Asia one-way?

What are the most popular routes from Ontario to Southeast Asia?

Can I find deals for flights from Ontario to Southeast Asia that include hotel bookings?

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Can I find deals for business class flights from Ontario to Southeast Asia?

What is the cheapest month to book a flight from Ontario to Southeast Asia?

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Top 6 airlines flying from Ontario to Southeast Asia

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Cheapest flights from Ontario to Southeast Asia
Explore the most affordable flight options available from Ontario to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.