Asia

$297+ 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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Jan 22 — Jan 291
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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 23, 2025.

This United Airlines deal was found by Cheapflights users on 12/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:42 amONT - SGN
2 stops44h 08mUnited Airlines
Tue 1/611:05 pmSGN - ONT
2 stops33h 38mUnited Airlines
Deal found 12/22$720
This Korean Air deal was found by Cheapflights users on 12/22. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:38 amONT - SGN
2 stops39h 12mKorean Air
Wed 1/2111:50 pmSGN - ONT
2 stops29h 06mKorean Air
Deal found 12/22$743
This United Airlines deal was found by Cheapflights users on 12/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:42 amONT - SGN
2 stops45h 13mUnited Airlines
Wed 1/76:00 amSGN - ONT
2 stops20h 18mUnited Airlines
Deal found 12/22$748
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:42 amONT - MNL
1 stop28h 08mUnited Airlines
Sun 1/189:55 amMNL - ONT
1 stop17h 23mUnited Airlines
Deal found 12/21$781
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:05 amONT - TPE
2 stops46h 45mUnited Airlines
Sat 1/1011:00 amTPE - ONT
3 stops46h 43mUnited Airlines
Deal found 12/21$807
This Delta deal was found by Cheapflights users on 12/21. 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.
Wed 12/316:00 amONT - TPE
2 stops47h 05mDelta
Mon 1/1910:55 amTPE - ONT
2 stops41h 21mDelta
Deal found 12/21$812
This Delta deal was found by Cheapflights users on 12/21. 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.
Wed 12/316:00 amONT - TPE
2 stops47h 05mDelta
Tue 1/207:25 pmTPE - ONT
2 stops43h 26mDelta
Deal found 12/21$813
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:05 amONT - TPE
2 stops46h 45mUnited Airlines
Mon 1/1911:10 amTPE - ONT
1 stop16h 08mUnited Airlines
Deal found 12/21$860
This United Airlines deal was found by Cheapflights users on 12/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:39 pmONT - BKK
2 stops49h 46mUnited Airlines
Wed 1/214:55 pmBKK - ONT
2 stops20h 58mUnited Airlines
Deal found 12/22$865
This United Airlines deal was found by Cheapflights users on 12/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:05 amONT - TPE
2 stops46h 45mUnited Airlines
Fri 1/163:50 pmTPE - ONT
1 stop36h 27mUnited Airlines
Deal found 12/21$866
This Delta deal was found by Cheapflights users on 12/22. 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 12/306:38 amONT - SGN
2 stops25h 42mDelta
Tue 1/278:00 amSGN - ONT
2 stops29h 51mDelta
Deal found 12/22$869
This Delta deal was found by Cheapflights users on 12/21. 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 12/305:49 pmONT - SGN
2 stops37h 36mDelta
Tue 2/311:50 pmSGN - ONT
2 stops37h 54mDelta
Deal found 12/21$874

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 23, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$598
(Vliegwinkel)

One-way from

$297
(SmartFares)

Popular in

December

Cheapest in

September

Average price

$1,348

Good round-trip deal

$684 or less

Good one-way deal

$413 or less
Provider with most accurate pricing for Los Angeles-Manila Ninoy Aquino Intl flight deals.
Provider most trusted by Cheapflights users for Los Angeles-Manila Ninoy Aquino Intl flights.
From Ontario to Asia
One-way flight from Ontario to Asia
Highest demand for flights based on searches. 7% potential increase in price ($68 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Average for round-trip flights in December 2025
Price to beat on a round-trip flight from Ontario to Asia.
Price to beat on a one-way flight from Ontario to Asia.

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 23, 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

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Thu 1/8

7:30 am-9:05 pm

1 stop21h 35m

Taipei City Taiwan Taoyuan Intl

Mon 1/26

10:55 am-10:51 pm

1 stop27h 56m

$648

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Sat 1/10

3:30 pm-9:05 pm

1 stop37h 35m

Taipei City Taiwan Taoyuan Intl

Mon 1/26

10:55 am-10:51 pm

1 stop27h 56m

$654

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Sat 1/10

1:11 pm-9:05 pm

2 stops39h 54m

Taipei City Taiwan Taoyuan Intl

Fri 1/30

10:55 am-11:58 pm

2 stops29h 03m

$657

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Sat 1/10

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

OntarioTokyo

ONT - HND

ONTHND

Ontario

Tue 1/6

5:07 pm-2:05 pm

2 stops27h 58m

Tokyo Haneda

Tue 1/20

4:50 pm-1:56 pm

1 stop14h 06m

$691

OntarioTokyo

ONT - HND

ONTHND

Ontario

Mon 1/19

5:10 pm-2:05 pm

2 stops27h 55m

Tokyo Haneda

Wed 1/28

4:50 pm-1:56 pm

1 stop14h 06m

$691

OntarioTokyo

ONT - HND

ONTHND

Ontario

Sun 1/11

5:07 pm-2:05 pm

2 stops27h 58m

Tokyo Haneda

Wed 1/21

4:50 pm-1:56 pm

1 stop14h 06m

$691

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Thu 4/16

12:10 am-5:15 am

Nonstop14h 05m

Taipei City Taiwan Taoyuan Intl

Sun 5/24

9:10 pm-6:00 pm

Nonstop11h 50m

$697

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Tue 2/10

10:50 pm-5:30 am

Nonstop14h 40m

Taipei City Taiwan Taoyuan Intl

Wed 2/25

9:25 pm-4:50 pm

Nonstop11h 25m

$701

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Wed 1/14

10:50 pm-5:30 am

Nonstop14h 40m

Taipei City Taiwan Taoyuan Intl

Mon 1/26

9:25 pm-4:50 pm

Nonstop11h 25m

$708

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

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 $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 23, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 11% 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 December 23, 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.

Entertainment

8.8

Crew

9.1

Overall

8.9

Food

8.7

Boarding

8.9

Comfort

8.8

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Entertainment

8.8

Crew

9.1

Overall

8.9

Food

8.7

Boarding

8.9

Comfort

8.8

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Entertainment

8.8

Crew

9.1

Overall

8.9

Food

8.7

Boarding

8.9

Comfort

8.8

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Entertainment

8.8

Crew

9.1

Overall

8.9

Food

8.7

Boarding

8.9

Comfort

8.8

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Entertainment

8.8

Crew

9.1

Overall

8.9

Food

8.7

Boarding

8.9

Comfort

8.8

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

Entertainment

8.8

Crew

9.1

Overall

8.9

Food

8.7

Boarding

8.9

Comfort

8.8

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?

    Delta, China Airlines, and United Airlines can get you from Ontario to Asia in just under 18h 25m. Your travel time can differ by up to 6h 16m. 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?

  • 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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Alternative routes for Ontario to Asia

See prices for flight routes from nearby airports that may be better suited for you.

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 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$486Average$1,038FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$637Average$950FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$647Average$728FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$648Average$989FlexibilityNo cancel feeOn-time70%
DeltaCheapest$655Average$947FlexibilityNo cancel feeOn-timeN/A
STARLUX AirlinesCheapest$655Average$1,170FlexibilityNo 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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