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$312+ 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Jan 9 — Jan 161
Fri 1/9
Fri 1/16
1 adult, Economy
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Cheap 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 December 10, 2025.

This IEagle deal was found by Cheapflights users on 12/8. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Fri 2/66:30 pmNRT - ONT
1 stop22h 26mAlaska Airlines
Deal found 12/8$713
This Alaska Airlines deal was found by Cheapflights users on 12/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Tue 2/36:30 pmNRT - ONT
1 stop19h 06mAlaska Airlines
Deal found 12/8$729
This United Airlines deal was found by Cheapflights users on 12/8. 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.
Wed 12/315:05 amONT - NRT
1 stop17h 35mUnited Airlines
Fri 2/65:45 pmNRT - ONT
2 stops35h 32mUnited Airlines
Deal found 12/8$749
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amONT - NRT
1 stop17h 00mMultiple Airlines
Mon 2/96:30 pmNRT - ONT
1 stop13h 38mMultiple Airlines
Deal found 12/10$767
This Alaska Airlines deal was found by Cheapflights users on 12/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Thu 1/226:30 pmNRT - ONT
1 stop13h 38mAlaska Airlines
Deal found 12/8$775
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:00 amONT - NRT
1 stop17h 00mMultiple Airlines
Wed 2/116:30 pmNRT - ONT
1 stop13h 38mMultiple Airlines
Deal found 12/10$777
This Alaska Airlines deal was found by Cheapflights users on 12/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Wed 1/146:30 pmNRT - ONT
1 stop13h 38mAlaska Airlines
Deal found 12/8$779
This Alaska Airlines deal was found by Cheapflights users on 12/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Wed 12/176:30 pmNRT - ONT
1 stop17h 03mAlaska Airlines
Deal found 12/9$780
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:00 amONT - NRT
1 stop17h 00mMultiple Airlines
Mon 2/96:30 pmNRT - ONT
1 stop22h 26mMultiple Airlines
Deal found 12/10$781
This Alaska Airlines deal was found by Cheapflights users on 12/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/912:13 pmONT - NRT
1 stop34h 47mAlaska Airlines
Sun 12/146:30 pmNRT - ONT
1 stop21h 59mAlaska Airlines
Deal found 12/9$788
This American Airlines deal was found by Cheapflights users on 12/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:59 pmONT - NRT
1 stop22h 31mAmerican Airlines
Thu 1/85:10 pmNRT - ONT
2 stops18h 10mAmerican Airlines
Deal found 12/9$800
This Alaska Airlines deal was found by Cheapflights users on 12/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Tue 1/206:30 pmNRT - ONT
1 stop13h 38mAlaska Airlines
Deal found 12/8$811

Find flight deals from Ontario to Asia

Keep the following information in mind while searching for Ontario to Asia flight deals. Data was last updated December 10, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$623
(KAYAK)

One-way from

$312
(Delta)

Popular in

December

Cheapest in

September

Average price

$1,339

Good round-trip deal

$679 or less

Good one-way deal

$426 or less
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.
Search Deals
From Ontario to Asia
Search Deals
One-way flight from Ontario to Asia
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($67 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
Price to beat on a round-trip flight from Ontario to Asia.
Search Deals
Price to beat on a one-way flight from Ontario to Asia.
Search Deals

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 December 10, 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 1/11

6:00 am-4:00 pm

1 stop17h 00m

Tokyo Narita

Fri 1/23

6:30 pm-3:08 pm

1 stop13h 38m

$636

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Sat 1/10

11:53 am-4:00 pm

1 stop35h 07m

Tokyo Narita

Fri 1/23

6:30 pm-3:08 pm

1 stop13h 38m

$643

OntarioNew Delhi

ONT - DEL

ONTDEL

Ontario

Tue 1/20

8:00 am-9:50 pm

2 stops24h 20m

New Delhi Indira Gandhi Intl

Fri 1/30

11:55 pm-9:58 pm

2 stops35h 33m

$657

OntarioNew Delhi

ONT - DEL

ONTDEL

Ontario

Fri 1/23

6:00 am-9:50 pm

2 stops26h 20m

New Delhi Indira Gandhi Intl

Fri 1/30

11:55 pm-9:58 pm

2 stops35h 33m

$657

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Wed 2/18

7:30 am-9:05 pm

1 stop21h 35m

Taipei City Taiwan Taoyuan Intl

Thu 3/19

9:55 am-11:19 am

1 stop16h 24m

$667

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Wed 1/21

7:30 am-9:05 pm

1 stop21h 35m

Taipei City Taiwan Taoyuan Intl

Tue 2/3

10:55 am-1:56 pm

1 stop19h 01m

$667

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Wed 4/1

11:59 am-7:55 pm

1 stop16h 56m

Taipei City Taiwan Taoyuan Intl

Mon 4/13

9:35 am-11:14 am

1 stop16h 39m

$667

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Thu 2/19

7:30 am-9:05 pm

1 stop21h 35m

Taipei City Taiwan Taoyuan Intl

Wed 3/18

9:55 am-11:19 am

1 stop16h 24m

$667

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Tue 2/24

7:30 am-9:05 pm

1 stop21h 35m

Taipei City Taiwan Taoyuan Intl

Tue 3/10

9:55 am-11:18 am

1 stop16h 23m

$667

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Tue 1/27

7:30 am-9:05 pm

1 stop21h 35m

Taipei City Taiwan Taoyuan Intl

Tue 2/3

10:55 am-1:56 pm

1 stop19h 01m

$667

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

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, February is the cheapest month in which you can book a flight from Ontario to Asia (average of $354). Flying from Ontario to Asia in June is currently the most expensive (average of $531). 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 December 10, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 10% 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. Sunday 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 December 10, 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
243 reviews

Overall

8.9

Entertainment

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Crew

9.2

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
243 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Overall

8.9

Entertainment

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Crew

9.2

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
1,184 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Overall

8.9

Entertainment

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Crew

9.2

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
China Airlines
8.2
Very good
788 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Overall

8.9

Entertainment

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Crew

9.2

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
8,009 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Overall

8.9

Entertainment

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Crew

9.2

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
9,095 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Overall

8.9

Entertainment

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Crew

9.2

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?

    United Airlines, Delta, and Alaska Airlines can get you from Ontario to Asia in just under 17h. Your travel time can differ by up to 7h 20m. 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?

    $352 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 $356 and $363, 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, February is the cheapest month in which you can book a flight from Ontario to Asia (average of $354). Flying from Ontario to Asia in June is currently the most expensive (average of $531). 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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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 December 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$486Average$1,068FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$637Average$956FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$647Average$728FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$666Average$1,014FlexibilityNo cancel feeOn-time70%
DeltaCheapest$686Average$1,044FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$712Average$964FlexibilityNo cancel feeOn-time71%
STARLUX AirlinesCheapest$731Average$1,317FlexibilityNo cancel feeOn-timeN/A
Philippine AirlinesCheapest$754Average$964FlexibilityNo cancel feeOn-time60%
Hawaiian AirlinesCheapest$892Average$1,430FlexibilityNo cancel feeOn-time85%
Cathay PacificCheapest$928Average$1,216FlexibilityNo cancel feeOn-time72%

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