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$318+ 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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
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 4, 2025.

This Delta deal was found by Cheapflights users on 12/3. 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.
Thu 12/46:40 amONT - TPE
1 stop22h 25mDelta
Wed 12/1710:55 amTPE - ONT
1 stop16h 18mDelta
Deal found 12/3$663
This Delta deal was found by Cheapflights users on 12/3. 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.
Thu 12/46:00 amONT - TPE
2 stops23h 05mDelta
Thu 12/1810:55 amTPE - ONT
2 stops29h 03mDelta
Deal found 12/3$672
This lol.travel deal was found by Cheapflights users on 12/3. 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 stop22h 44mAlaska Airlines
Deal found 12/3$680
This IEagle deal was found by Cheapflights users on 12/3. 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.
Fri 12/56:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Sat 12/136:30 pmNRT - ONT
1 stop17h 03mAlaska Airlines
Deal found 12/3$696
This Alaska Airlines deal was found by Cheapflights users on 12/1. 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.
Fri 12/56:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Sat 12/66:30 pmNRT - ONT
1 stop17h 03mAlaska Airlines
Deal found 12/1$704
This Alaska Airlines deal was found by Cheapflights users on 12/2. 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.
Fri 12/56:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Mon 12/156:30 pmNRT - ONT
1 stop17h 03mAlaska Airlines
Deal found 12/2$712
This IEagle deal was found by Cheapflights users on 12/3. 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 12/36:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Tue 12/166:30 pmNRT - ONT
1 stop17h 03mAlaska Airlines
Deal found 12/3$714
This Alaska Airlines deal was found by Cheapflights users on 12/1. 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 12/312:13 pmONT - NRT
1 stop34h 47mAlaska Airlines
Sat 12/66:30 pmNRT - ONT
1 stop17h 03mAlaska Airlines
Deal found 12/1$719
This Expedia deal was found by Cheapflights users on 12/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Fri 12/126:30 pmNRT - ONT
1 stop21h 59mAlaska Airlines
Deal found 12/3$725
This Alaska Airlines deal was found by Cheapflights users on 12/2. 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 12/36:00 amONT - NRT
1 stop17h 00mAlaska Airlines
Wed 12/106:30 pmNRT - ONT
1 stop17h 03mAlaska Airlines
Deal found 12/2$730
This Trip.com deal was found by Cheapflights users on 12/2. 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 Trip.com 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
Thu 12/186:30 pmNRT - ONT
1 stop22h 44mHawaiian Airlines
Deal found 12/2$731
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/185:05 amONT - DEL
2 stops27h 20mUnited Airlines
Sun 1/412:25 amDEL - ONT
2 stops35h 30mUnited Airlines
Deal found 12/2$733

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 4, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$595
(lol.travel)

One-way from

$318
(SmartFares)

Popular in

December

Cheapest in

September

Average price

$1,387

Good round-trip deal

$686 or less

Good one-way deal

$419 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. 8% potential increase in price ($87 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($43 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 4, 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

OntarioNew Delhi

ONT - DEL

ONTDEL

Ontario

Fri 1/30

5:05 am-9:55 pm

2 stops27h 20m

New Delhi Indira Gandhi Intl

Mon 2/23

11:55 pm-5:41 pm

3 stops31h 16m

$656

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Sun 4/5

11:59 am-7:55 pm

1 stop16h 56m

Taipei City Taiwan Taoyuan Intl

Sun 4/12

9:35 am-11:19 am

1 stop16h 44m

$663

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Mon 3/23

11:59 am-9:05 pm

1 stop18h 06m

Taipei City Taiwan Taoyuan Intl

Tue 3/31

9:35 am-5:13 pm

1 stop22h 38m

$663

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-11:19 am

1 stop16h 44m

$663

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Thu 3/5

7:30 am-9:05 pm

1 stop21h 35m

Taipei City Taiwan Taoyuan Intl

Wed 4/15

9:35 am-5:16 pm

1 stop22h 41m

$663

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Thu 3/19

11:59 am-9:05 pm

1 stop18h 06m

Taipei City Taiwan Taoyuan Intl

Sun 3/29

9:35 am-11:19 am

1 stop16h 44m

$663

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Mon 3/23

6:00 am-9:05 pm

1 stop24h 05m

Taipei City Taiwan Taoyuan Intl

Fri 5/8

9:35 am-12:29 pm

2 stops17h 54m

$668

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Wed 1/28

5:10 pm-9:05 pm

2 stops35h 55m

Taipei City Taiwan Taoyuan Intl

Wed 5/20

9:35 am-11:44 pm

2 stops29h 09m

$668

OntarioManila

ONT - MNL

ONTMNL

Ontario

Sun 1/11

10:50 pm-3:55 pm

1 stop25h 05m

Manila Ninoy Aquino Intl

Wed 1/21

10:55 am-4:50 pm

1 stop21h 55m

$687

OntarioManila

ONT - MNL

ONTMNL

Ontario

Sat 5/2

12:10 am-9:35 am

1 stop18h 25m

Manila Ninoy Aquino Intl

Mon 5/18

10:35 am-6:00 pm

1 stop22h 25m

$687

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

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 $360). 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 December 4, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 7% 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 4, 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

Crew

9.2

Overall

8.9

Comfort

8.9

Food

8.7

Entertainment

8.9

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
243 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Crew

9.2

Overall

8.9

Comfort

8.9

Food

8.7

Entertainment

8.9

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
1,179 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Crew

9.2

Overall

8.9

Comfort

8.9

Food

8.7

Entertainment

8.9

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
787 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Crew

9.2

Overall

8.9

Comfort

8.9

Food

8.7

Entertainment

8.9

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
8,011 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Crew

9.2

Overall

8.9

Comfort

8.9

Food

8.7

Entertainment

8.9

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
9,065 reviews
STARLUX Airlines
8.9
Very good
243 reviews

Crew

9.2

Overall

8.9

Comfort

8.9

Food

8.7

Entertainment

8.9

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 China Airlines can get you from Ontario to Asia in just under 16h 56m. Your travel time can differ by up to 10h 24m. Airlines will cover a distance of 6814 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 - 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 $360). 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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$486Average$1,045FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$637Average$956FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$647Average$728FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$668Average$1,085FlexibilityNo cancel feeOn-time70%
DeltaCheapest$686Average$978FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$712Average$964FlexibilityNo cancel feeOn-time71%
STARLUX AirlinesCheapest$731Average$1,302FlexibilityNo cancel feeOn-timeN/A
Philippine AirlinesCheapest$754Average$964FlexibilityNo cancel feeOn-time60%
Hawaiian AirlinesCheapest$892Average$1,430FlexibilityNo cancel feeOn-time85%

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