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Southeast Asia

$378+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
abr. 22 — abr. 291
mar. 4/22
mar. 4/29
1 adult, Economy
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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 abril 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$727
(oojo)

One-way from

$397
(United Airlines)

Popular in

December

Cheapest in

March

Average price

$859
Provider with most accurate pricing for Los Angeles-Manila Ninoy Aquino Intl flight deals.
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From Ontario to Southeast Asia
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One-way flight from Ontario to Southeast Asia
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Highest demand for flights based on searches. 9% potential increase in price ($104 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($53 potential savings vs. average RT price).
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Average for round-trip flights in April 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 abril 17, 2025.

This oojo deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/1110:45 pmONT - CEB
1 stop20h 20mChina Airlines
mar. 12/212:05 pmCEB - ONT
1 stop20h 45mChina Airlines
Deal found 4/16$698
This oojo deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/112:10 amONT - MNL
1 stop18h 25mChina Airlines
sáb. 10/1810:35 amMNL - ONT
1 stop22h 25mChina Airlines
Deal found 4/16$727
This Justfly.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 4/275:45 amONT - BKK
2 stops26h 00mKorean Air
sáb. 6/72:35 amBKK - ONT
2 stops28h 26mKorean Air
Deal found 4/16$750
This EaseMyTrip deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/107:00 amONT - MNL
2 stops24h 05mKorean Air
sáb. 9/2011:30 pmMNL - ONT
2 stops32h 47mKorean Air
Deal found 4/17$760
This oojo deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/112:45 amONT - HAN
1 stop26h 05mChina Airlines
mar. 9/911:35 amHAN - ONT
1 stop21h 05mChina Airlines
Deal found 4/17$766
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 4/265:45 amONT - BKK
2 stops26h 00mDelta
sáb. 5/109:40 pmBKK - ONT
2 stops34h 40mDelta
Deal found 4/17$767
This United Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/26:00 amONT - HAN
2 stops26h 15mUnited Airlines
mar. 9/911:35 pmHAN - ONT
2 stops32h 07mUnited Airlines
Deal found 4/17$774
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/65:45 amONT - KUL
2 stops49h 05mDelta
dom. 5/1811:10 pmKUL - ONT
2 stops34h 10mDelta
Deal found 4/16$774
This ScholarTrip deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/227:00 amONT - CEB
2 stops25h 30mKorean Air
mar. 11/2512:10 amCEB - ONT
2 stops29h 08mKorean Air
Deal found 4/16$776
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/227:00 amONT - HAN
2 stops24h 35mDelta
lun. 11/1012:20 pmHAN - ONT
2 stops19h 57mDelta
Deal found 4/17$780
This ScholarTrip deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/17:00 amONT - SIN
2 stops25h 40mKorean Air
vie. 9/191:10 amSIN - ONT
2 stops31h 07mKorean Air
Deal found 4/16$782
This oojo deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/2212:10 amONT - BKK
1 stop26h 10mChina Airlines
jue. 10/302:05 pmBKK - ONT
1 stop17h 45mChina Airlines
Deal found 4/17$787

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Southeast Asia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated abril 17, 2025.
Use the filters below to find and compare flights from Ontario to Southeast Asia that are best for you.

Fly from

Ontario

Fly to

Southeast Asia

Route

Depart

Return

Price

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

dom. 4/27

5:45 am-9:45 pm

2 stops26h 00m

Bangkok Suvarnabhumi

sáb. 6/7

2:35 am-5:01 pm

2 stops28h 26m

$750

OntarioManila

ONT - MNL

ONTMNL

Ontario

mié. 5/7

12:10 am-9:35 am

1 stop18h 25m

Manila Ninoy Aquino Intl

mié. 5/21

10:35 am-6:00 pm

1 stop22h 25m

$761

OntarioManila

ONT - MNL

ONTMNL

Ontario

jue. 5/1

5:45 am-10:05 pm

2 stops25h 20m

Manila Ninoy Aquino Intl

dom. 6/1

11:30 pm-6:20 pm

2 stops33h 50m

$764

OntarioCebu City

ONT - CEB

ONTCEB

Ontario

dom. 5/4

12:10 am-11:05 am

1 stop19h 55m

Cebu City Mactan Intl

lun. 6/2

12:05 pm-6:00 pm

1 stop20h 55m

$764

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

lun. 9/1

12:45 am-4:50 pm

1 stop26h 05m

Hanoi Noibai

mar. 9/9

11:35 am-6:40 pm

1 stop21h 05m

$766

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

mar. 9/2

6:00 am-10:15 pm

2 stops26h 15m

Hanoi Noibai

mar. 9/9

11:35 pm-5:42 pm

2 stops32h 07m

$774

OntarioKuala Lumpur

ONT - KUL

ONTKUL

Ontario

mar. 5/6

5:45 am-9:50 pm

2 stops49h 05m

Kuala Lumpur Intl

dom. 5/18

11:10 pm-6:20 pm

2 stops34h 10m

$774

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

jue. 9/18

6:00 am-9:45 pm

2 stops25h 45m

Bangkok Suvarnabhumi

dom. 10/19

11:30 pm-5:17 pm

2 stops31h 47m

$777

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

lun. 9/1

7:00 am-11:40 pm

2 stops25h 40m

Singapore Changi

vie. 9/19

1:10 am-5:17 pm

2 stops31h 07m

$782

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

lun. 9/22

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

jue. 10/30

2:05 pm-5:50 pm

1 stop17h 45m

$787

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 60 results
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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, March is the cheapest month in which you can book a flight from Ontario to Southeast Asia (average of $958). Flying from Ontario to Southeast Asia in December is currently the most expensive (average of $1,574). 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?

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 abril 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Southeast Asia as you normally would.

Rainfall in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average rainfall totals by month.

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.

Temperature in Southeast Asia by month

Plan your trip to Southeast Asia by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Southeast Asia

Get insights into the airlines that provide service to Southeast Asia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Southeast Asia. Reviews last updated abril 17, 2025.
Read reviews from past customers who have flown STARLUX Airlines, EVA Air and Korean Air from Ontario to Southeast Asia. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Food

8.9

Crew

9.3

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
STARLUX Airlines
9.1
Wonderful
154 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Food

8.9

Crew

9.3

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
EVA Air
8.4
Very good
1,177 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Food

8.9

Crew

9.3

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Korean Air
8.4
Very good
1,064 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Food

8.9

Crew

9.3

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Japan Airlines
8.3
Very good
1,447 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Food

8.9

Crew

9.3

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
China Airlines
8.2
Very good
729 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Entertainment

9.0

Boarding

9.0

Comfort

9.0

Food

8.9

Crew

9.3

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

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?

    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.

  • 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 $397. China Airlines flights start at $401 while deals on Korean Air start at $413 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 - Manila Ninoy Aquino Intl, Ontario - Bangkok Suvarnabhumi 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, March is the cheapest month in which you can book a flight from Ontario to Southeast Asia (average of $958). Flying from Ontario to Southeast Asia in December is currently the most expensive (average of $1,574). 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

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Alternative routes for Ontario to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Ontario to Southeast Asia

Discover the top 9 airlines that operate flights from Ontario to Southeast Asia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated abril 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$538Average$1,170FlexibilityNo cancel feeOn-time69%
DeltaCheapest$556Average$821FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$657Average$895FlexibilityNo cancel feeOn-time81%
Cathay PacificCheapest$704Average$833FlexibilityNo cancel feeOn-time72%
Asiana AirlinesCheapest$705Average$818FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$741Average$932FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$741Average$1,138FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$780Average$1,271FlexibilityNo cancel feeOn-time74%
Philippine AirlinesCheapest$938Average$1,331FlexibilityNo cancel feeOn-time60%

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