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$311+ Cheap flights from Ontario (ONT) to 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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Dec 19 — Dec 261
Fri 12/19
Fri 12/26
1 adult, Economy
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Cheap flight deals from Ontario to Asia

Keep the following information in mind while searching for Ontario to Asia flight deals. Data was last updated November 19, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$598
(SmartFares)

One-way from

$311
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$782

Good round-trip deal

$709 or less

Good one-way deal

$420 or less
Provider with most accurate pricing for Los Angeles-Manila Ninoy Aquino Intl flight deals.
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From Ontario to Asia
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One-way flight from Ontario to Asia
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Highest demand for flights based on searches. 8% potential increase in price ($88 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Ontario to Asia.
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Price to beat on a one-way flight from Ontario to Asia.
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Find flight deals from Ontario to Asia

Cheapest flights from Ontario to Asia
Explore the most affordable flight options available from Ontario to Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 19, 2025.

This lol.travel deal was found by Cheapflights users on 11/18. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Thu 12/186:30 pmNRT - ONT
1 stop16h 55mAlaska Airlines
Deal found 11/18$650
This Flightnetwork deal was found by Cheapflights users on 11/17. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/3010:50 pmONT - MNL
1 stop25h 05mChina Airlines
Mon 12/153:35 amMNL - ONT
1 stop29h 15mChina Airlines
Deal found 11/17$659
This CrystalTravel deal was found by Cheapflights users on 11/17. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:50 pmONT - MNL
1 stop19h 05mChina Airlines
Mon 12/84:55 pmMNL - ONT
1 stop15h 55mChina Airlines
Deal found 11/17$660
This SmartFares deal was found by Cheapflights users on 11/18. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:00 amONT - NRT
1 stop17h 00mHawaiian Airlines
Fri 12/126:30 pmNRT - ONT
1 stop21h 59mHawaiian Airlines
Deal found 11/18$662
This oojo deal was found by Cheapflights users on 11/18. 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 11/2510:50 pmONT - MNL
1 stop25h 05mChina Airlines
Mon 12/810:55 amMNL - ONT
1 stop21h 55mChina Airlines
Deal found 11/18$663
This SmartFares deal was found by Cheapflights users on 11/17. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:00 amONT - NRT
1 stop17h 00mHawaiian Airlines
Fri 12/126:30 pmNRT - ONT
1 stop21h 59mHawaiian Airlines
Deal found 11/17$663
This Delta deal was found by Cheapflights users on 11/18. 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.
Tue 11/1811:48 amONT - TPE
1 stop17h 17mDelta
Thu 12/410:55 amTPE - ONT
1 stop22h 13mDelta
Deal found 11/18$664
This CheapOair deal was found by Cheapflights users on 11/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:50 pmONT - MNL
1 stop19h 05mChina Airlines
Thu 12/113:35 amMNL - ONT
1 stop29h 15mChina Airlines
Deal found 11/16$665
This oojo deal was found by Cheapflights users on 11/16. 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.
Sat 11/2910:50 pmONT - MNL
1 stop25h 05mChina Airlines
Sun 12/1410:55 amMNL - ONT
1 stop21h 55mChina Airlines
Deal found 11/16$666
This Delta deal was found by Cheapflights users on 11/18. 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.
Mon 12/15:49 pmONT - TPE
1 stop35h 16mDelta
Thu 4/309:35 amTPE - ONT
1 stop16h 39mDelta
Deal found 11/18$669
This lol.travel deal was found by Cheapflights users on 11/19. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Thu 12/116:30 pmNRT - ONT
1 stop17h 03mAlaska Airlines
Deal found 11/19$672
This Gotogate deal was found by Cheapflights users on 11/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2810:50 pmONT - MNL
1 stop25h 05mChina Airlines
Thu 12/113:35 amMNL - ONT
1 stop29h 15mChina Airlines
Deal found 11/18$675

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to 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 November 19, 2025.
Use the filters below to find and compare flights from Ontario to Asia that are best for you.

Fly from

Ontario

Fly to

Asia

Route

Depart

Return

Price

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Sun 1/18

6:00 am-4:00 pm

1 stop17h 00m

Tokyo Narita

Tue 1/27

6:30 pm-8:36 pm

1 stop19h 06m

$636

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Sun 1/18

6:00 am-4:00 pm

1 stop17h 00m

Tokyo Narita

Tue 2/3

6:30 pm-8:36 pm

1 stop19h 06m

$636

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Tue 1/20

4:03 pm-4:00 pm

1 stop30h 57m

Tokyo Narita

Wed 1/28

6:30 pm-3:08 pm

1 stop13h 38m

$643

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Mon 3/2

7:30 am-9:05 pm

1 stop21h 35m

Taipei City Taiwan Taoyuan Intl

Sun 4/12

9:35 am-11:14 am

1 stop16h 39m

$663

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Sun 2/1

7:30 am-9:05 pm

1 stop21h 35m

Taipei City Taiwan Taoyuan Intl

Tue 2/24

10:55 am-1:56 pm

1 stop19h 01m

$664

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Wed 4/8

6:45 am-7:55 pm

1 stop22h 10m

Taipei City Taiwan Taoyuan Intl

Wed 4/22

9:35 am-5:16 pm

1 stop22h 41m

$664

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Sat 2/14

3:30 pm-9:05 pm

1 stop37h 35m

Taipei City Taiwan Taoyuan Intl

Sat 3/28

9:55 am-5:15 pm

1 stop22h 20m

$669

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Mon 3/30

11:10 pm-4:15 am

Nonstop14h 05m

Taipei City Taiwan Taoyuan Intl

Wed 4/1

8:05 pm-5:05 pm

Nonstop12h 00m

$677

OntarioTokyo

ONT - HND

ONTHND

Ontario

Sun 1/18

8:13 am-7:30 pm

1 stop18h 17m

Tokyo Haneda

Tue 2/3

8:05 pm-10:28 pm

1 stop19h 23m

$685

OntarioTokyo

ONT - HND

ONTHND

Ontario

Mon 2/2

1:10 pm-2:05 pm

2 stops31h 55m

Tokyo Haneda

Thu 2/12

4:50 pm-10:40 pm

1 stop22h 50m

$691

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Asia

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

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Asia (average of $361). Flying from Ontario to Asia in June is currently the most expensive (average of $534). 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 AS?

Find hourly flight availability from Ontario to Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 19, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 8% on flights from Ontario to Asia by exploring options for tickets in the evening.

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

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

Travelers seeking maximum savings on their Ontario to Asia flight should consider departing on Tuesday afternoons 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 Asia

Get insights into the airlines that provide service to 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 Asia. Reviews last updated November 19, 2025.
Read reviews from past customers who have flown STARLUX Airlines, Korean Air, and China Airlines from Ontario to Asia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very good
232 reviews

Crew

9.2

Food

8.7

Comfort

8.9

Overall

8.9

Boarding

9.0

Entertainment

8.9

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
232 reviews
STARLUX Airlines
8.9
Very good
232 reviews

Crew

9.2

Food

8.7

Comfort

8.9

Overall

8.9

Boarding

9.0

Entertainment

8.9

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
1,167 reviews
STARLUX Airlines
8.9
Very good
232 reviews

Crew

9.2

Food

8.7

Comfort

8.9

Overall

8.9

Boarding

9.0

Entertainment

8.9

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
782 reviews
STARLUX Airlines
8.9
Very good
232 reviews

Crew

9.2

Food

8.7

Comfort

8.9

Overall

8.9

Boarding

9.0

Entertainment

8.9

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
Delta
7.9
Good
8,004 reviews
STARLUX Airlines
8.9
Very good
232 reviews

Crew

9.2

Food

8.7

Comfort

8.9

Overall

8.9

Boarding

9.0

Entertainment

8.9

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
9,025 reviews
STARLUX Airlines
8.9
Very good
232 reviews

Crew

9.2

Food

8.7

Comfort

8.9

Overall

8.9

Boarding

9.0

Entertainment

8.9

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

Find useful and relevant information for your journey from Ontario to 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 Asia?

    If you book a flight to Asia from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • How long is the flight from Ontario to Asia?

    Alaska Airlines, Delta, and China Airlines can get you from Ontario to Asia in just under 17h. Your travel time can differ by up to 8h 05m. Airlines will cover a distance of 5469 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 Asia one-way?

    $338 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Alaska Airlines and Korean Air, with prices starting from $345 and $349, respectively.

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

    The most popular route from Ontario to Asia is Ontario - Tokyo Narita. You may also consider Ontario - Tokyo Haneda or Ontario - Bangkok Suvarnabhumi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to 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 Asia?

    Currently, October is the cheapest month in which you can book a flight from Ontario to Asia (average of $361). Flying from Ontario to Asia in June is currently the most expensive (average of $534). 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 Asia

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Top 10 airlines flying from Ontario to Asia

Discover the top 10 airlines that operate flights from Ontario to 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 November 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$486Average$1,071FlexibilityNo cancel feeOn-time69%
Asiana AirlinesCheapest$647Average$727FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$683Average$1,088FlexibilityNo cancel feeOn-time70%
DeltaCheapest$686Average$980FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$698Average$993FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$712Average$920FlexibilityNo cancel feeOn-time71%
Philippine AirlinesCheapest$767Average$968FlexibilityNo cancel feeOn-time60%
STARLUX AirlinesCheapest$787Average$1,101FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$892Average$1,430FlexibilityNo cancel feeOn-time85%
Cathay PacificCheapest$928Average$1,216FlexibilityNo cancel feeOn-time72%

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