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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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Jan 31 — Feb 71
Sat 1/31
Sat 2/7
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 January 1, 2026.

This Delta deal was found by Cheapflights users on 12/31. 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.
Wed 12/316:00 amONT - TPE
2 stops47h 05mDelta
Wed 1/2110:55 amTPE - ONT
1 stop19h 01mDelta
Deal found 12/31$686
This Delta deal was found by Cheapflights users on 12/31. 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.
Wed 12/316:00 amONT - TPE
2 stops47h 05mDelta
Sun 1/2510:55 amTPE - ONT
2 stops53h 03mDelta
Deal found 12/31$698
This United Airlines deal was found by Cheapflights users on 12/31. 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 12/311:40 pmONT - TPE
2 stops38h 10mUnited Airlines
Mon 1/2611:10 amTPE - ONT
1 stop16h 08mUnited Airlines
Deal found 12/31$785
This Delta deal was found by Cheapflights users on 12/31. 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.
Wed 12/316:00 amONT - TPE
2 stops47h 05mDelta
Mon 1/2610:55 amTPE - ONT
2 stops29h 03mDelta
Deal found 12/31$806
This United Airlines deal was found by Cheapflights users on 12/31. 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 12/311:40 pmONT - TPE
2 stops38h 10mUnited Airlines
Wed 1/2111:00 amTPE - ONT
3 stops46h 43mUnited Airlines
Deal found 12/31$807
This United Airlines deal was found by Cheapflights users on 12/30. 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.
Tue 12/306:39 pmONT - SGN
2 stops38h 36mUnited Airlines
Tue 2/36:00 amSGN - ONT
2 stops31h 53mUnited Airlines
Deal found 12/30$957
This China Airlines deal was found by Cheapflights users on 12/31. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:50 pmONT - TPE
Nonstop14h 40mChina Airlines
Tue 1/279:25 pmTPE - ONT
Nonstop11h 25mChina Airlines
Deal found 12/31$958
This United Airlines deal was found by Cheapflights users on 12/30. 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.
Tue 12/301:40 pmONT - TPE
2 stops62h 10mUnited Airlines
Wed 1/1411:10 amTPE - ONT
1 stop22h 33mUnited Airlines
Deal found 12/30$959
This oojo deal was found by Cheapflights users on 12/30. 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 12/3010:50 pmONT - SGN
1 stop27h 00mChina Airlines
Tue 2/35:50 pmSGN - ONT
1 stop38h 00mChina Airlines
Deal found 12/30$981
This oojo deal was found by Cheapflights users on 12/30. 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.
Wed 12/319:45 pmONT - MNL
1 stop21h 20mSTARLUX Airlines
Fri 1/1611:50 amMNL - ONT
1 stop20h 00mSTARLUX Airlines
Deal found 12/30$986
This oojo deal was found by Cheapflights users on 12/30. 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.
Wed 12/3110:50 pmONT - BKK
1 stop20h 00mChina Airlines
Tue 2/242:35 amBKK - ONT
1 stop29h 15mChina Airlines
Deal found 12/30$1,011
This Delta deal was found by Cheapflights users on 12/31. 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.
Wed 12/3111:15 amONT - DEL
2 stops48h 25mDelta
Sun 2/83:20 amDEL - ONT
2 stops26h 25mDelta
Deal found 12/31$1,172

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 January 1, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$591
(SmartFares)

One-way from

$312
(Delta)

Popular in

December

Cheapest in

September

Average price

$823

Good round-trip deal

$689 or less

Good one-way deal

$411 or less
Provider with most accurate pricing for Los Angeles-Manila Ninoy Aquino Intl flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Manila Ninoy Aquino Intl flights.
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From Ontario to Asia
Search Deals
One-way flight from Ontario to Asia
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($70 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 January 2026
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.
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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 January 1, 2026.
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

OntarioNew Delhi

ONT - DEL

ONTDEL

Ontario

Wed 2/4

6:00 am-9:55 pm

2 stops26h 25m

New Delhi Indira Gandhi Intl

Sat 2/28

11:55 pm-5:41 pm

3 stops31h 16m

$656

OntarioNew Delhi

ONT - DEL

ONTDEL

Ontario

Fri 2/6

6:00 am-9:55 pm

2 stops26h 25m

New Delhi Indira Gandhi Intl

Sat 2/28

11:55 pm-5:41 pm

3 stops31h 16m

$656

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Mon 1/5

6:00 am-9:05 pm

2 stops47h 05m

Taipei City Taiwan Taoyuan Intl

Tue 1/27

10:55 am-4:15 pm

2 stops21h 20m

$657

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Wed 1/7

7:30 am-9:05 pm

1 stop21h 35m

Taipei City Taiwan Taoyuan Intl

Sun 1/25

10:55 am-11:58 pm

2 stops53h 03m

$658

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Thu 1/8

6:00 am-9:05 pm

2 stops23h 05m

Taipei City Taiwan Taoyuan Intl

Sun 1/25

10:55 am-4:15 pm

2 stops45h 20m

$658

OntarioNew Delhi

ONT - DEL

ONTDEL

Ontario

Thu 2/5

6:39 pm-9:55 pm

2 stops37h 46m

New Delhi Indira Gandhi Intl

Sat 2/28

11:55 pm-5:41 pm

3 stops31h 16m

$661

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Fri 1/23

6:00 am-4:00 pm

1 stop17h 00m

Tokyo Narita

Tue 2/10

6:30 pm-3:08 pm

1 stop13h 38m

$674

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Fri 1/16

6:00 am-4:00 pm

1 stop17h 00m

Tokyo Narita

Tue 2/3

6:30 pm-3:08 pm

1 stop13h 38m

$675

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Sat 1/24

4:03 pm-4:00 pm

1 stop30h 57m

Tokyo Narita

Sun 2/8

6:30 pm-3:08 pm

1 stop13h 38m

$681

OntarioNew Delhi

ONT - DEL

ONTDEL

Ontario

Fri 2/6

7:30 am-2:40 am

2 stops29h 40m

New Delhi Indira Gandhi Intl

Sat 2/28

5:00 am-9:05 pm

2 stops53h 35m

$681

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/30

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 January 1, 2026.

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

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 January 1, 2026.
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
252 reviews

Overall

8.9

Comfort

8.8

Entertainment

8.8

Food

8.7

Crew

9.1

Boarding

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
252 reviews
STARLUX Airlines
8.9
Very good
252 reviews

Overall

8.9

Comfort

8.8

Entertainment

8.8

Food

8.7

Crew

9.1

Boarding

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
1,185 reviews
STARLUX Airlines
8.9
Very good
252 reviews

Overall

8.9

Comfort

8.8

Entertainment

8.8

Food

8.7

Crew

9.1

Boarding

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
798 reviews
STARLUX Airlines
8.9
Very good
252 reviews

Overall

8.9

Comfort

8.8

Entertainment

8.8

Food

8.7

Crew

9.1

Boarding

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
8,021 reviews
STARLUX Airlines
8.9
Very good
252 reviews

Overall

8.9

Comfort

8.8

Entertainment

8.8

Food

8.7

Crew

9.1

Boarding

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
9,134 reviews
STARLUX Airlines
8.9
Very good
252 reviews

Overall

8.9

Comfort

8.8

Entertainment

8.8

Food

8.7

Crew

9.1

Boarding

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?

    United Airlines, Delta, and Korean Air can get you from Ontario to Asia in just under 24h 05m. Your travel time can differ by up to 23h. Airlines will cover a distance of 7327 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?

    $342 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 - Manila Ninoy Aquino Intl.

  • 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 January 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$486Average$1,039FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$637Average$953FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$647Average$728FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$648Average$984FlexibilityNo cancel feeOn-time70%
DeltaCheapest$655Average$948FlexibilityNo cancel feeOn-timeN/A
STARLUX AirlinesCheapest$656Average$1,168FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$712Average$974FlexibilityNo cancel feeOn-time71%
Philippine AirlinesCheapest$754Average$956FlexibilityNo cancel feeOn-time60%
Hawaiian AirlinesCheapest$892Average$1,437FlexibilityNo cancel feeOn-time85%
Cathay PacificCheapest$928Average$1,216FlexibilityNo cancel feeOn-time72%

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