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Southeast Asia

$423+ 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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Dec 30 — Jan 61
Mon 12/30
Mon 1/6
1 adult, Economy
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Cheap flight deals from Ontario to Southeast Asia

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Southeast Asia (zzYJX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 25, 2024.

Round-trip from

$776
(oojo)

One-way from

$423
(oojo)
From Ontario to Southeast Asia
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One-way flight from Ontario to Southeast Asia
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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 December 25, 2024.

This oojo deal was found by Cheapflights users on 12/24. 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.
Sun 12/2910:45 pmONT - CGK
1 stop23h 55mChina Airlines
Tue 5/131:30 amCGK - ONT
1 stop30h 30mChina Airlines
Deal found 12/24$1,172
This oojo deal was found by Cheapflights users on 12/24. 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.
Sun 12/2910:45 pmONT - SGN
1 stop27h 05mChina Airlines
Thu 1/235:50 pmSGN - ONT
1 stop38h 00mChina Airlines
Deal found 12/24$1,222
This oojo deal was found by Cheapflights users on 12/24. 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.
Sat 12/2810:45 pmONT - HAN
1 stop26h 50mChina Airlines
Mon 1/2011:35 amHAN - ONT
1 stop20h 15mChina Airlines
Deal found 12/24$1,317
This Justfly.com deal was found by Cheapflights users on 12/25. 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.
Mon 12/307:00 amONT - SGN
2 stops24h 15mKorean Air
Mon 1/2011:40 pmSGN - ONT
2 stops30h 45mKorean Air
Deal found 12/25$1,345
This oojo deal was found by Cheapflights users on 12/25. 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.
Sun 12/2910:45 pmONT - BKK
1 stop27h 00mChina Airlines
Wed 1/222:05 pmBKK - ONT
1 stop17h 45mChina Airlines
Deal found 12/25$1,360
This Trip.com deal was found by Cheapflights users on 12/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2910:45 pmONT - SGN
1 stop27h 05mMultiple Airlines
Thu 1/238:05 amSGN - ONT
2 stops26h 07mMultiple Airlines
Deal found 12/24$1,374
This Mytrip deal was found by Cheapflights users on 12/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2910:45 pmONT - CGK
1 stop23h 55mMultiple Airlines
Tue 5/1312:05 amCGK - ONT
2 stops31h 55mMultiple Airlines
Deal found 12/24$1,444
This Justfly.com deal was found by Cheapflights users on 12/24. 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.
Sat 12/287:00 amONT - HAN
2 stops37h 10mKorean Air
Mon 1/2012:20 pmHAN - ONT
2 stops49h 12mKorean Air
Deal found 12/24$1,452
This oojo deal was found by Cheapflights users on 12/24. 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.
Tue 12/3110:45 pmONT - CEB
1 stop20h 20mChina Airlines
Wed 1/1511:05 pmCEB - ONT
2 stops33h 45mChina Airlines
Deal found 12/24$1,468
This Delta deal was found by Cheapflights users on 12/25. 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.
Sun 12/297:00 amONT - SGN
2 stops38h 50mDelta
Wed 1/152:05 pmSGN - ONT
2 stops40h 20mDelta
Deal found 12/25$1,638
This Justfly.com deal was found by Cheapflights users on 12/24. 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.
Sun 12/297:00 amONT - MNL
2 stops36h 00mKorean Air
Sat 1/1112:55 amMNL - ONT
2 stops30h 30mKorean Air
Deal found 12/24$1,765
This EVA Air deal was found by Cheapflights users on 12/25. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/296:00 amONT - MNL
2 stops24h 50mMultiple Airlines
Mon 1/276:50 pmMNL - ONT
2 stops19h 49mMultiple Airlines
Deal found 12/25$1,769

Find flights from Ontario to Southeast Asia within your budget

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 December 25, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioCebu City

ONT - CEB

ONTCEB

Ontario

Sun 5/4

12:10 am-11:05 am

1 stop19h 55m

Cebu City Mactan Intl

Mon 6/2

12:05 pm-6:00 pm

1 stop20h 55m

$767

OntarioManila

ONT - MNL

ONTMNL

Ontario

Mon 4/7

12:10 am-9:35 am

1 stop18h 25m

Manila Ninoy Aquino Intl

Wed 4/9

4:50 pm-6:00 pm

1 stop16h 10m

$768

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Tue 4/1

5:40 am-11:05 pm

2 stops27h 25m

Ho Chi Minh City

Thu 5/8

1:55 pm-5:14 pm

2 stops41h 19m

$813

OntarioHanoi

ONT - HAN

ONTHAN

Ontario

Wed 4/9

12:10 am-4:50 pm

1 stop26h 40m

Hanoi Noibai

Wed 4/16

5:50 pm-6:00 pm

1 stop38h 10m

$822

OntarioHo Chi Minh City

ONT - SGN

ONTSGN

Ontario

Thu 4/17

12:10 am-9:40 am

1 stop19h 30m

Ho Chi Minh City

Mon 6/2

10:50 am-6:00 pm

1 stop21h 10m

$835

OntarioSingapore

ONT - SIN

ONTSIN

Ontario

Tue 2/4

6:00 am-12:10 am

2 stops26h 10m

Singapore Changi

Tue 2/25

11:00 am-10:32 pm

2 stops27h 32m

$859

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 5/6

12:10 am-4:20 pm

1 stop26h 10m

Bangkok Suvarnabhumi

Mon 5/12

10:50 am-6:00 pm

1 stop21h 10m

$873

OntarioManila

ONT - MNL

ONTMNL

Ontario

Tue 4/22

6:00 am-5:55 am

1 stop32h 55m

Manila Ninoy Aquino Intl

Thu 5/1

8:40 am-12:33 pm

2 stops42h 53m

$875

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 1/15

6:00 am-1:15 pm

2 stops40h 15m

Bangkok Suvarnabhumi

Wed 2/5

9:30 pm-3:25 pm

2 stops32h 55m

$877

OntarioDa Nang

ONT - DAD

ONTDAD

Ontario

Tue 3/4

10:45 pm-9:10 am

1 stop19h 25m

Da Nang

Wed 5/21

9:50 am-6:00 pm

1 stop22h 10m

$880

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

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.

Travel insights for flights from Ontario to Southeast Asia

Get recent, data-driven insights about flights from Ontario to Southeast Asia including ideal travel times, pricing trends, and more.

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Southeast Asia (average of $996). Flying from Ontario to Southeast Asia in June is currently the most expensive (average of $1,585). 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 December 25, 2024.

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 December 25, 2024.
Read reviews from past customers who have flown Korean Air, Delta and China Airlines from Ontario to Southeast Asia. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,023 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Korean Air
8.4
Very good
1,023 reviews
Korean Air
8.4
Very good
1,023 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Japan Airlines
8.3
Very good
1,442 reviews
Korean Air
8.4
Very good
1,023 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

China Airlines
8.3
Very good
754 reviews
Korean Air
8.4
Very good
1,023 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Asiana Airlines
8.3
Very good
472 reviews
Korean Air
8.4
Very good
1,023 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Delta
8.0
Very good
8,580 reviews
Korean Air
8.4
Very good
1,023 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

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 China Airlines, which is currently one of the cheapest options available, starting at $423. Korean Air flights start at $446 while deals on United Airlines start at $455 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, October is the cheapest month in which you can book a flight from Ontario to Southeast Asia (average of $996). Flying from Ontario to Southeast Asia in June is currently the most expensive (average of $1,585). 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.

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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 10 airlines flying from Ontario to Southeast Asia

Discover the top 10 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 December 25, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$589Average$939FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$657Average$992FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$683Average$995FlexibilityNo cancel feeOn-time76%
Cathay PacificCheapest$710Average$905FlexibilityNo cancel feeOn-time72%
China AirlinesCheapest$741Average$1,035FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$780Average$1,153FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$795Average$1,314FlexibilityNo cancel feeOn-time69%
Japan AirlinesCheapest$806Average$1,064FlexibilityNo cancel feeOn-time79%
ANACheapest$835Average$884FlexibilityNo cancel feeOn-time80%
STARLUX AirlinesCheapest$919Average$1,229FlexibilityNo cancel feeOn-timeN/A
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