How long is the flight from Ontario to Southeast Asia?

There are many flights that can get you from Ontario to Southeast Asia in 20h 20m. Fly via China Airlines, Korean Air, or United Airlines to get the fastest option. The distance from Ontario to Southeast Asia is about 7369 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 United Airlines, which is currently one of the cheapest options available, starting at $302. Korean Air flights start at $353 while deals on China Airlines start at $360 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.

$302+ Flights from Ontario to Southeast Asia

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Cheap flight deals from Ontario to Southeast Asia

Most accurate provider	Justfly.com 3 stars
Most trusted provider	Justfly.com 3 stars
Round-trip from	$666 (oojo)
One-way from	$302 (United Airlines)
Popular in	December
Cheapest in	September
Average price	$762

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

Search Deals

Provider most trusted by Cheapflights users for Los Angeles-Manila Ninoy Aquino Intl flights.

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From Ontario to Southeast Asia

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One-way flight from Ontario to Southeast Asia

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($109 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).

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Average for round-trip flights in October 2025

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Find 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 October 30, 2025.

Mon 11/1010:50 pmONT - MNL

1 stop25h 05mChina Airlines

Mon 11/2410:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 10/30

$680

Tue 11/256:45 amONT - MNL

2 stops23h 40mKorean Air

Mon 12/13:10 amMNL - ONT

2 stops29h 58mKorean Air

Deal found 10/28

$682

Mon 11/310:50 pmONT - MNL

1 stop19h 05mChina Airlines

Wed 11/54:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 10/30

$686

Sun 11/1610:50 pmONT - MNL

1 stop25h 05mChina Airlines

Sun 2/1510:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 10/29

$687

Thu 10/3011:50 pmONT - MNL

1 stop19h 05mChina Airlines

Thu 11/134:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 10/28

$688

Wed 11/1210:50 pmONT - MNL

1 stop19h 05mChina Airlines

Mon 12/84:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 10/28

$691

Mon 11/310:50 pmONT - MNL

1 stop25h 05mChina Airlines

Sun 3/294:00 amMNL - ONT

1 stop29h 00mChina Airlines

Deal found 10/29

$692

Tue 11/2510:50 pmONT - MNL

1 stop19h 05mChina Airlines

Mon 12/84:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 10/30

$693

Sat 11/1510:50 pmONT - MNL

1 stop25h 05mChina Airlines

Sun 3/84:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 10/29

$696

Sat 11/1510:50 pmONT - CEB

1 stop20h 20mChina Airlines

Mon 12/1512:10 pmCEB - ONT

1 stop20h 40mChina Airlines

Deal found 10/30

$696

Sat 11/810:50 pmONT - MNL

1 stop19h 05mChina Airlines

Sun 11/1610:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 10/28

$699

Fri 11/2810:50 pmONT - CEB

1 stop20h 20mChina Airlines

Thu 12/1112:10 pmCEB - ONT

1 stop20h 40mChina Airlines

Deal found 10/30

$701

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 October 30, 2025.

Fri 1/3010:50 pmONT - CEB

1 stop20h 20mChina Airlines

Mon 2/212:10 pmCEB - ONT

1 stop20h 40mChina Airlines

Deal found 10/29

$688

Tue 11/256:45 amONT - CEB

2 stops23h 35mKorean Air

Sun 12/712:15 amCEB - ONT

2 stops38h 32mKorean Air

Deal found 10/28

$706

Thu 1/226:39 pmONT - KUL

2 stops23h 41mUnited Airlines

Wed 2/182:15 pmKUL - ONT

2 stops43h 26mUnited Airlines

Deal found 10/30

$721

Fri 2/139:45 pmONT - CRK

1 stop29h 30mSTARLUX Airlines

Fri 2/278:15 pmCRK - ONT

1 stop35h 35mSTARLUX Airlines

Deal found 10/27

$790

Tue 11/184:11 pmONT - CRK

2 stops24h 49mMultiple Airlines

Sun 1/188:15 pmCRK - ONT

1 stop35h 35mMultiple Airlines

Deal found 10/27

$862

Mon 11/176:45 amONT - SIN

2 stops25h 25mDelta

Tue 11/251:35 amSIN - ONT

2 stops37h 20mDelta

Deal found 10/28

$884

Fri 1/910:50 pmONT - MNL

1 stop25h 05mChina Airlines

Wed 1/284:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 10/28

$695

Wed 11/266:45 amONT - CEB

2 stops23h 35mKorean Air

Sun 12/712:15 amCEB - ONT

2 stops32h 52mKorean Air

Deal found 10/28

$706

Sun 1/116:00 amONT - KUL

2 stops32h 45mUnited Airlines

Mon 4/136:40 pmKUL - ONT

2 stops38h 20mUnited Airlines

Deal found 10/30

$723

Tue 1/2010:50 pmONT - HAN

1 stop20h 45mChina Airlines

Thu 2/511:35 amHAN - ONT

1 stop20h 15mChina Airlines

Deal found 10/30

$697

Tue 11/256:45 amONT - CEB

2 stops23h 35mKorean Air

Tue 12/912:15 amCEB - ONT

2 stops32h 52mKorean Air

Deal found 10/28

$706

Wed 1/289:45 pmONT - CRK

1 stop19h 15mSTARLUX Airlines

Mon 3/910:00 amCRK - ONT

1 stop21h 50mSTARLUX Airlines

Deal found 10/30

$794

Tue 1/136:00 amONT - KUL

2 stops32h 45mUnited Airlines

Mon 4/136:40 pmKUL - ONT

2 stops38h 07mUnited Airlines

Deal found 10/30

$723

Sun 4/2612:10 amONT - DAD

1 stop26h 25mChina Airlines

Tue 5/265:35 pmDAD - ONT

1 stop38h 25mChina Airlines

Deal found 10/30

$703

Wed 11/266:45 amONT - CEB

2 stops23h 35mKorean Air

Tue 12/912:15 amCEB - ONT

2 stops32h 52mKorean Air

Deal found 10/28

$706

Mon 3/3011:10 pmONT - CRK

1 stop29h 20mMultiple Airlines

Mon 4/138:30 pmCRK - ONT

2 stops53h 23mMultiple Airlines

Deal found 10/28

$870

Sat 1/249:45 pmONT - CRK

1 stop19h 15mSTARLUX Airlines

Tue 2/248:15 pmCRK - ONT

1 stop35h 35mSTARLUX Airlines

Deal found 10/30

$794

Mon 1/121:53 pmONT - KUL

2 stops48h 52mUnited Airlines

Sat 3/215:00 pmKUL - ONT

2 stops44h 37mUnited Airlines

Deal found 10/30

$726

Tue 3/310:50 pmONT - CEB

1 stop20h 20mChina Airlines

Sat 3/712:10 pmCEB - ONT

1 stop20h 40mChina Airlines

Deal found 10/28

$705

Tue 11/256:45 amONT - CEB

2 stops23h 35mKorean Air

Wed 12/312:15 amCEB - ONT

2 stops38h 32mKorean Air

Deal found 10/28

$706

Tue 3/316:45 amONT - DPS

2 stops26h 05mDelta

Sun 4/191:10 amDPS - ONT

2 stops36h 30mDelta

Deal found 10/29

$941

Wed 2/49:45 pmONT - CRK

1 stop19h 15mSTARLUX Airlines

Sun 2/228:15 pmCRK - ONT

1 stop35h 35mSTARLUX Airlines

Deal found 10/30

$794

Mon 12/15:05 amONT - KUL

2 stops27h 10mUnited Airlines

Mon 12/158:05 amKUL - ONT

2 stops25h 32mUnited Airlines

Deal found 10/30

$727

Tue 3/106:55 pmONT - CRK

2 stops25h 05mMultiple Airlines

Tue 6/2312:00 pmCRK - ONT

2 stops27h 14mMultiple Airlines

Deal found 10/28

$929

Wed 11/266:45 amONT - CEB

2 stops23h 35mKorean Air

Mon 12/812:15 amCEB - ONT

2 stops38h 32mKorean Air

Deal found 10/28

$706

Mon 3/306:45 amONT - DPS

2 stops26h 05mDelta

Wed 4/221:10 amDPS - ONT

2 stops36h 30mDelta

Deal found 10/29

$941

Fri 1/309:45 pmONT - CRK

1 stop29h 30mSTARLUX Airlines

Mon 3/910:00 amCRK - ONT

1 stop21h 50mSTARLUX Airlines

Deal found 10/30

$794

Sun 1/1110:50 pmONT - SGN

1 stop27h 00mChina Airlines

Sat 1/245:50 pmSGN - ONT

1 stop38h 00mChina Airlines

Deal found 10/29

$724

Mon 2/166:00 amONT - KUL

2 stops26h 15mUnited Airlines

Mon 3/98:05 amKUL - ONT

2 stops24h 55mUnited Airlines

Deal found 10/30

$727

Tue 1/64:36 pmONT - CRK

2 stops26h 24mMultiple Airlines

Thu 1/2212:05 pmCRK - ONT

2 stops27h 51mMultiple Airlines

Deal found 10/29

$933

Last-minute flights from Ontario to Southeast Asia
Discover last-minute flight deals from Ontario to Southeast Asia. Data last updated October 30, 2025 and is based on user searches.

Thu 10/3011:50 pmONT - MNL

1 stop19h 05mChina Airlines

Thu 11/134:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 10/28

$688

Mon 11/310:50 pmONT - MNL

1 stop19h 05mChina Airlines

Fri 11/214:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 10/28

$686

Mon 11/310:50 pmONT - MNL

1 stop25h 05mChina Airlines

Sun 3/294:00 amMNL - ONT

1 stop29h 00mChina Airlines

Deal found 10/29

$692

Sat 11/810:50 pmONT - MNL

1 stop19h 05mChina Airlines

Sun 11/1610:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 10/28

$699

Mon 11/1010:50 pmONT - MNL

1 stop25h 05mChina Airlines

Mon 11/2410:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 10/30

$680

Wed 11/1210:50 pmONT - MNL

1 stop19h 05mChina Airlines

Sun 12/74:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 10/28

$691

Sat 11/1510:50 pmONT - MNL

1 stop25h 05mChina Airlines

Sun 3/84:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 10/29

$696

Sat 11/1510:50 pmONT - CEB

1 stop20h 20mChina Airlines

Mon 12/1512:10 pmCEB - ONT

1 stop20h 40mChina Airlines

Deal found 10/30

$696

Sun 11/1610:50 pmONT - MNL

1 stop25h 05mChina Airlines

Sun 2/1510:55 amMNL - ONT

1 stop21h 55mChina Airlines

Deal found 10/29

$687

Tue 11/256:45 amONT - MNL

2 stops23h 40mKorean Air

Mon 12/13:10 amMNL - ONT

2 stops29h 58mKorean Air

Deal found 10/28

$682

Tue 11/2510:50 pmONT - MNL

1 stop19h 05mChina Airlines

Mon 12/84:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 10/30

$693

Fri 11/2810:50 pmONT - CEB

1 stop20h 20mChina Airlines

Thu 12/1112:10 pmCEB - ONT

1 stop20h 40mChina Airlines

Deal found 10/30

$701

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 October 30, 2025.

Mon 11/36:00 amONT - MNL

1 stop23h 00mUnited Airlines

Deal found 10/28

$302

Thu 11/135:05 amONT - MNL

2 stops33h 45mUnited Airlines

Deal found 10/28

$308

Wed 1/288:30 amONT - SGN

3 stops59h 10mMultiple Airlines

Deal found 10/29

$345

Tue 1/66:00 amONT - CEB

2 stops24h 15mUnited Airlines

Deal found 10/28

$351

Sat 1/106:00 amONT - CEB

2 stops24h 15mUnited Airlines

Deal found 10/28

$352

Thu 11/136:45 amONT - MNL

2 stops36h 15mKorean Air

Deal found 10/30

$353

Sun 11/96:45 amONT - MNL

2 stops36h 15mKorean Air

Deal found 10/30

$354

Tue 1/2710:50 pmONT - MNL

1 stop19h 05mChina Airlines

Deal found 10/28

$355

Mon 11/246:45 amONT - SIN

2 stops25h 25mKorean Air

Deal found 10/30

$360

Sun 1/1110:50 pmONT - CEB

1 stop20h 20mChina Airlines

Deal found 10/28

$360

Tue 11/256:45 amONT - CEB

2 stops23h 35mKorean Air

Deal found 10/28

$361

Wed 1/71:53 pmONT - CEB

2 stops40h 22mUnited Airlines

Deal found 10/28

$362

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

OntarioCebu City

ONT - CEB

ONTCEB

Ontario

Fri 1/30

10:50 pm-11:10 am

1 stop20h 20m

Cebu City Mactan Intl

Mon 2/2

12:10 pm-4:50 pm

1 stop20h 40m

$688

OntarioManila

ONT - MNL

ONTMNL

Ontario

Fri 1/9

10:50 pm-3:55 pm

1 stop25h 05m

Manila Ninoy Aquino Intl

Wed 1/28

4:55 pm-4:50 pm

1 stop15h 55m

$695

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Tue 1/20

10:50 pm-10:35 am

1 stop20h 45m

Hanoi Noibai

Thu 2/5

11:35 am-4:50 pm

1 stop20h 15m

$697

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Sun 4/26

12:10 am-4:35 pm

1 stop26h 25m

Da Nang

Tue 5/26

5:35 pm-6:00 pm

1 stop38h 25m

$703

OntarioCebu City

ONT - CEB

ONTCEB

Ontario

Tue 3/3

10:50 pm-11:10 am

1 stop20h 20m

Cebu City Mactan Intl

Sat 3/7

12:10 pm-4:50 pm

1 stop20h 40m

$705

OntarioCebu City

ONT - CEB

ONTCEB

Ontario

Tue 11/25

6:45 am-10:20 pm

2 stops23h 35m

Cebu City Mactan Intl

Sun 12/7

12:15 am-10:47 pm

2 stops38h 32m

$706

OntarioCebu City

ONT - CEB

ONTCEB

Ontario

Wed 11/26

6:45 am-10:20 pm

2 stops23h 35m

Cebu City Mactan Intl

Sun 12/7

12:15 am-5:07 pm

2 stops32h 52m

$706

OntarioCebu City

ONT - CEB

ONTCEB

Ontario

Tue 11/25

6:45 am-10:20 pm

2 stops23h 35m

Cebu City Mactan Intl

Tue 12/9

12:15 am-5:07 pm

2 stops32h 52m

$706

OntarioCebu City

ONT - CEB

ONTCEB

Ontario

Wed 11/26

6:45 am-10:20 pm

2 stops23h 35m

Cebu City Mactan Intl

Tue 12/9

12:15 am-5:07 pm

2 stops32h 52m

$706

OntarioCebu City

ONT - CEB

ONTCEB

Ontario

Tue 11/25

6:45 am-10:20 pm

2 stops23h 35m

Cebu City Mactan Intl

Wed 12/3

12:15 am-10:47 pm

2 stops38h 32m

$706

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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. Saturday 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

219 reviews

Reviews

1 / 8

10.0

Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!

STARLUX Airlines

8.9

Very good

219 reviews

STARLUX Airlines

8.9

Very good

219 reviews

Reviews

1 / 8

10.0

Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!

Korean Air

8.4

Very good

1,155 reviews

STARLUX Airlines

8.9

Very good

219 reviews

Reviews

1 / 8

10.0

Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!

China Airlines

8.3

Very good

776 reviews

STARLUX Airlines

8.9

Very good

219 reviews

Reviews

1 / 8

10.0

Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!

Asiana Airlines

8.2

Very good

484 reviews

STARLUX Airlines

8.9

Very good

219 reviews

Reviews

1 / 8

10.0

Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!

United Airlines

7.4

Good

8,996 reviews

STARLUX Airlines

8.9

Very good

219 reviews

Reviews

1 / 8

10.0

Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!

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 20h 20m. Fly via China Airlines, Korean Air, or United Airlines to get the fastest option. The distance from Ontario to Southeast Asia is about 7369 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 United Airlines, which is currently one of the cheapest options available, starting at $302. Korean Air flights start at $353 while deals on China Airlines start at $360 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
Asiana Airlines	Cheapest$640	Average$760	FlexibilityNo cancel fee	On-time76%
China Airlines	Cheapest$688	Average$991	FlexibilityNo cancel fee	On-time70%
Korean Air	Cheapest$698	Average$861	FlexibilityNo cancel fee	On-time81%
STARLUX Airlines	Cheapest$757	Average$1,051	FlexibilityNo cancel fee	On-timeN/A
Philippine Airlines	Cheapest$767	Average$968	FlexibilityNo cancel fee	On-time60%
United Airlines	Cheapest$777	Average$1,099	FlexibilityNo cancel fee	On-time69%

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$302+ 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 11/3. 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

Keep the following information in mind while searching for Ontario to Southeast Asia flight deals. Data was last updated October 30, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 October 30, 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 October 30, 2025.

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 October 30, 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.

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

How long is the flight from Ontario to Southeast Asia?

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?

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

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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Alternative routes for 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 October 30, 2025.