HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Asia

$378+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
May 20 — May 271
Tue 5/20
Tue 5/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Asia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 May 15, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$728
(Kiwi.com)

One-way from

$378
(Justfly.com)

Popular in

December

Cheapest in

March

Average price

$1,064

Good round-trip deal

$847 or less

Good one-way deal

$491 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. 9% potential increase in price ($111 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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

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 May 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 5/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/289:41 pmONT - NRT
1 stop24h 34mMultiple Airlines
Mon 8/184:25 pmNRT - ONT
1 stop23h 15mMultiple Airlines
Deal found 5/15$725
This Trip.com deal was found by Cheapflights users on 5/14. 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.
Tue 11/187:00 amONT - BKK
2 stops25h 20mKorean Air
Wed 12/311:15 pmBKK - ONT
2 stops33h 02mKorean Air
Deal found 5/14$774
This Delta deal was found by Cheapflights users on 5/14. 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 8/286:00 amONT - KUL
2 stops24h 50mDelta
Sun 9/2111:10 pmKUL - ONT
2 stops38h 32mDelta
Deal found 5/14$775
This Delta deal was found by Cheapflights users on 5/15. 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 11/187:00 amONT - BKK
2 stops25h 20mDelta
Tue 11/251:00 amBKK - ONT
2 stops31h 17mDelta
Deal found 5/15$778
This Justfly.com deal was found by Cheapflights users on 5/15. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/87:00 amONT - MNL
2 stops22h 45mKorean Air
Mon 11/1712:55 amMNL - ONT
2 stops32h 22mKorean Air
Deal found 5/15$782
This Gotogate deal was found by Cheapflights users on 5/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2212:10 amONT - MNL
1 stop18h 25mChina Airlines
Tue 10/74:00 amMNL - ONT
1 stop29h 00mChina Airlines
Deal found 5/13$792
This Alaska Airlines deal was found by Cheapflights users on 5/14. 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.
Mon 11/36:00 amONT - NRT
1 stop16h 40mAlaska Airlines
Thu 11/136:10 pmNRT - ONT
1 stop14h 02mAlaska Airlines
Deal found 5/14$807
This Gotogate deal was found by Cheapflights users on 5/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2211:45 pmONT - BKK
1 stop26h 55mSTARLUX Airlines
Fri 8/291:10 pmBKK - ONT
1 stop18h 30mSTARLUX Airlines
Deal found 5/15$812
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Sun 8/106:39 pmONT - MNL
1 stop20h 16mUnited Airlines
Wed 9/108:40 amMNL - ONT
1 stop23h 57mUnited Airlines
Deal found 5/14$849
This FlightHub deal was found by Cheapflights users on 5/15. 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 11/1810:45 pmONT - TPE
Nonstop14h 45mChina Airlines
Mon 2/169:25 pmTPE - ONT
Nonstop11h 25mChina Airlines
Deal found 5/15$860
This Delta deal was found by Cheapflights users on 5/15. 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 5/226:00 amONT - TPE
1 stop22h 55mDelta
Mon 7/149:35 amTPE - ONT
1 stop28h 12mDelta
Deal found 5/15$861
This Gotogate deal was found by Cheapflights users on 5/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1212:10 amONT - SGN
1 stop19h 30mChina Airlines
Mon 11/35:50 pmSGN - ONT
1 stop38h 00mChina Airlines
Deal found 5/13$863

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 May 15, 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

Mon 7/28

9:41 pm-2:15 pm

1 stop24h 34m

Tokyo Narita

Mon 8/18

4:25 pm-11:40 pm

1 stop23h 15m

$725

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Wed 10/29

7:00 am-11:20 pm

2 stops26h 20m

Bangkok Suvarnabhumi

Mon 11/10

11:15 pm-5:17 pm

2 stops33h 02m

$774

OntarioKuala Lumpur

ONT - KUL

ONTKUL

Ontario

Thu 8/28

6:00 am-9:50 pm

2 stops24h 50m

Kuala Lumpur Intl

Sun 9/21

11:10 pm-10:42 pm

2 stops38h 32m

$775

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Tue 10/21

7:00 am-11:25 pm

2 stops26h 25m

Bangkok Suvarnabhumi

Thu 10/30

9:40 am-10:42 pm

2 stops27h 02m

$777

OntarioManila

ONT - MNL

ONTMNL

Ontario

Sun 8/3

12:45 am-9:35 am

1 stop17h 50m

Manila Ninoy Aquino Intl

Tue 9/2

10:35 am-6:40 pm

1 stop23h 05m

$796

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Mon 11/3

6:00 am-3:40 pm

1 stop16h 40m

Tokyo Narita

Thu 11/13

6:10 pm-3:12 pm

1 stop14h 02m

$807

OntarioManila

ONT - MNL

ONTMNL

Ontario

Fri 8/1

6:30 am-11:59 pm

2 stops26h 29m

Manila Ninoy Aquino Intl

Sat 8/9

11:30 pm-5:06 pm

2 stops32h 36m

$813

OntarioBangkok

ONT - BKK

ONTBKK

Ontario

Mon 9/22

11:10 pm-12:00 pm

1 stop22h 50m

Bangkok Suvarnabhumi

Sun 10/5

5:50 pm-5:05 pm

1 stop37h 15m

$814

OntarioManila

ONT - MNL

ONTMNL

Ontario

Sun 8/10

6:39 pm-5:55 am

1 stop20h 16m

Manila Ninoy Aquino Intl

Wed 9/10

8:40 am-5:37 pm

1 stop23h 57m

$849

OntarioTaipei City

ONT - TPE

ONTTPE

Ontario

Sun 10/19

12:10 am-5:15 am

Nonstop14h 05m

Taipei City Taiwan Taoyuan Intl

Thu 11/20

9:25 pm-4:50 pm

Nonstop11h 25m

$860

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/15

Showing 1-10 of 60 results
1
2
3
...
6

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 $1,002). Flying from Ontario to Asia in December is currently the most expensive (average of $1,635). 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 May 15, 2025.

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.

Rainfall in Asia by month

Plan your trip to Asia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Asia ranges from 0.4 - 15.7 inches per month. July is typically the wettest month, when rainfall can reach 15.7 in. February is typically the driest time to visit Asia when rainfall is around 0.4 in.

Temperature in Asia by month

Plan your trip to Asia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Asia, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 78.8 F).

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 May 15, 2025.
STARLUX Airlines
9.1
Wonderful
168 reviews

Comfort

9.0

Food

8.9

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
STARLUX Airlines
9.1
Wonderful
168 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Comfort

9.0

Food

8.9

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
EVA Air
8.4
Very good
1,192 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Comfort

9.0

Food

8.9

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Korean Air
8.4
Very good
1,073 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Comfort

9.0

Food

8.9

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Japan Airlines
8.3
Very good
1,473 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Comfort

9.0

Food

8.9

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
China Airlines
8.3
Very good
732 reviews
STARLUX Airlines
9.1
Wonderful
168 reviews

Comfort

9.0

Food

8.9

Crew

9.3

Boarding

9.1

Overall

9.1

Entertainment

9.0

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.

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.

  • What are the cheapest airlines to fly from Ontario to Asia one-way?

    $378 is the cheapest one-way deal found within the past few days, from Korean Air. You may also be able to find cheap deals on Delta and STARLUX Airlines, with prices starting from $411 and $423, 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 $1,002). Flying from Ontario to Asia in December is currently the most expensive (average of $1,635). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Asia

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Seattle flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Haneda flights
Los Angeles to Honolulu flights
Los Angeles to Newark flights
Los Angeles to Narita flights
San Francisco to Newark flights
Los Angeles to LaGuardia flights
San Jose to Los Angeles flights
Los Angeles to Las Vegas flights
Los Angeles to Cancún flights
Santa Ana to Las Vegas flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to Boston flights
San Francisco to Haneda flights
San Francisco to Honolulu flights
Los Angeles to San Jose flights
Los Angeles to Mexico City flights
San Francisco to LaGuardia flights
Burbank to Las Vegas flights
Ontario to John F Kennedy Intl flights
Los Angeles to Orlando flights
Los Angeles to San Francisco flights
Los Angeles to Miami flights
Ontario to Seattle flights
San Francisco to Los Angeles flights
Los Angeles to Portland flights
Santa Ana to Seattle flights
Los Angeles to O'Hare Intl flights
Los Angeles to Denver flights
Oakland to Las Vegas flights
Los Angeles to Oakland flights
Oakland to Los Angeles flights
San Francisco to Narita flights
San Francisco to Boston flights
Ontario to Honolulu flights
San Francisco to Seattle flights
San Francisco to Las Vegas flights
San Francisco to O'Hare Intl flights
San Francisco to Heathrow flights
Ontario to Dallas/Fort Worth flights
San Diego to Seattle flights
Burbank to Newark flights
Los Angeles to Reagan-National flights
San Jose to Seattle flights
Los Angeles to Kahului flights
Los Angeles to Dulles Intl flights
Santa Ana to Oakland flights
Burbank to Seattle flights

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 May 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$486Average$1,211FlexibilityNo cancel feeOn-time69%
ZIPAIRCheapest$591Average$778FlexibilityNo cancel feeOn-timeN/A
Japan AirlinesCheapest$660Average$1,125FlexibilityNo cancel feeOn-time79%
ANACheapest$686Average$1,051FlexibilityNo cancel feeOn-time80%
Korean AirCheapest$698Average$1,010FlexibilityNo cancel feeOn-time81%
Cathay PacificCheapest$704Average$784FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$712Average$1,067FlexibilityNo cancel feeOn-time71%
Asiana AirlinesCheapest$720Average$728FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$737Average$1,082FlexibilityNo cancel feeOn-time70%
EVA AirCheapest$780Average$1,255FlexibilityNo cancel feeOn-time74%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.