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$317+ 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 24 — Dec 311
Wed 12/24
Wed 12/31
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 24, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$602
(SmartFares)

One-way from

$317
(Kiwi.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 ($44 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 24, 2025.

This Korean Air deal was found by Cheapflights users on 11/21. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:45 amONT - HKG
2 stops42h 05mKorean Air
Tue 12/212:55 amHKG - ONT
2 stops37h 52mKorean Air
Deal found 11/21$641
This Kissandfly.com deal was found by Cheapflights users on 11/24. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:50 pmONT - TPE
Nonstop14h 40mChina Airlines
Mon 12/89:25 pmTPE - ONT
Nonstop11h 25mChina Airlines
Deal found 11/24$657
This oojo deal was found by Cheapflights users on 11/24. 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.
Mon 11/2410:50 pmONT - MNL
1 stop25h 05mChina Airlines
Mon 12/84:55 pmMNL - ONT
1 stop15h 55mChina Airlines
Deal found 11/24$663
This Delta deal was found by Cheapflights users on 11/23. 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 11/2511:46 amONT - TPE
1 stop17h 19mDelta
Fri 12/1210:55 amTPE - ONT
1 stop16h 18mDelta
Deal found 11/23$663
This Delta deal was found by Cheapflights users on 11/21. 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 11/256:00 amONT - TPE
2 stops23h 05mDelta
Wed 12/310:55 amTPE - ONT
2 stops29h 03mDelta
Deal found 11/21$668
This Delta deal was found by Cheapflights users on 11/23. 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 12/1810:55 amTPE - ONT
1 stop22h 12mDelta
Deal found 11/23$669
This flugladen.de deal was found by Cheapflights users on 11/24. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2810:50 pmONT - TPE
Nonstop14h 40mChina Airlines
Thu 12/119:25 pmTPE - ONT
Nonstop11h 25mChina Airlines
Deal found 11/24$671
This Delta deal was found by Cheapflights users on 11/21. 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.
Sat 11/225:49 pmONT - TPE
1 stop35h 16mDelta
Fri 12/510:55 amTPE - ONT
2 stops21h 14mDelta
Deal found 11/21$674
This Delta deal was found by Cheapflights users on 11/22. 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 12/3011:42 amONT - HND
1 stop33h 23mDelta
Fri 1/164:50 pmHND - ONT
1 stop23h 01mDelta
Deal found 11/22$678
This Delta deal was found by Cheapflights users on 11/23. 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 12/14:49 pmONT - TPE
2 stops36h 16mDelta
Thu 4/309:35 amTPE - ONT
1 stop16h 39mDelta
Deal found 11/23$679
This FlightHub deal was found by Cheapflights users on 11/23. 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 FlightHub 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
Thu 12/1810:55 amMNL - ONT
1 stop21h 55mChina Airlines
Deal found 11/23$682
This Korean Air deal was found by Cheapflights users on 11/21. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:45 amONT - TPE
2 stops36h 15mKorean Air
Sat 12/67:25 pmTPE - ONT
2 stops43h 22mKorean Air
Deal found 11/21$682

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 24, 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 - HND

ONTHND

Ontario

Tue 1/20

8:13 am-7:30 pm

1 stop18h 17m

Tokyo Haneda

Tue 1/27

9:20 pm-10:28 pm

1 stop18h 08m

$634

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

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Thu 1/22

7:30 am-4:50 pm

2 stops41h 20m

Hong Kong Intl

Sun 1/25

12:55 am-10:51 pm

2 stops37h 56m

$637

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Tue 1/13

7:30 am-11:10 pm

2 stops23h 40m

Hong Kong Intl

Mon 2/16

12:35 pm-10:37 pm

2 stops26h 02m

$638

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Wed 2/11

7:30 am-11:10 pm

2 stops23h 40m

Hong Kong Intl

Mon 2/16

12:35 pm-10:37 pm

2 stops26h 02m

$638

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Wed 1/14

7:30 am-11:10 pm

2 stops23h 40m

Hong Kong Intl

Mon 2/16

12:35 pm-10:37 pm

2 stops26h 02m

$638

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Thu 4/9

6:00 am-10:30 pm

2 stops25h 30m

Hong Kong Intl

Tue 4/21

12:45 am-10:40 pm

2 stops36h 55m

$638

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Mon 2/16

7:30 am-11:10 pm

2 stops23h 40m

Hong Kong Intl

Tue 2/24

12:35 pm-10:37 pm

2 stops26h 02m

$638

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Sun 1/11

7:30 am-11:10 pm

2 stops23h 40m

Hong Kong Intl

Tue 1/27

12:35 pm-10:51 pm

2 stops26h 16m

$638

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Sun 4/26

12:10 am-5:15 am

Nonstop14h 05m

Taipei City Taiwan Taoyuan Intl

Wed 6/24

9:10 pm-6:00 pm

Nonstop11h 50m

$699

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/22

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 $356). 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 24, 2025.

Unlike at noon, 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 24, 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
235 reviews

Boarding

9.0

Entertainment

8.9

Food

8.7

Comfort

8.9

Overall

8.9

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
235 reviews
STARLUX Airlines
8.9
Very good
235 reviews

Boarding

9.0

Entertainment

8.9

Food

8.7

Comfort

8.9

Overall

8.9

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
1,170 reviews
STARLUX Airlines
8.9
Very good
235 reviews

Boarding

9.0

Entertainment

8.9

Food

8.7

Comfort

8.9

Overall

8.9

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
8.3
Very good
782 reviews
STARLUX Airlines
8.9
Very good
235 reviews

Boarding

9.0

Entertainment

8.9

Food

8.7

Comfort

8.9

Overall

8.9

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
7,998 reviews
STARLUX Airlines
8.9
Very good
235 reviews

Boarding

9.0

Entertainment

8.9

Food

8.7

Comfort

8.9

Overall

8.9

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
9,044 reviews
STARLUX Airlines
8.9
Very good
235 reviews

Boarding

9.0

Entertainment

8.9

Food

8.7

Comfort

8.9

Overall

8.9

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?

    Alaska Airlines, Delta, and Korean Air can get you from Ontario to Asia in just under 18h 17m. Your travel time can differ by up to 23h 03m. Airlines will cover a distance of 5505 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 $348, 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 $356). 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

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 Asia

Discover the top 9 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 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$486Average$1,046FlexibilityNo cancel feeOn-time69%
Asiana AirlinesCheapest$647Average$727FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$683Average$1,113FlexibilityNo 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%

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