HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Asia

$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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$571
(SmartFares)

One-way from

$317
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$755

Good round-trip deal

$741 or less

Good one-way deal

$426 or less
From Ontario to Asia
Search Deals
One-way flight from Ontario to Asia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($121 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 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 September 17, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/295:05 amONT - DEL
2 stops28h 35mUnited Airlines
Tue 10/2812:25 amDEL - ONT
2 stops34h 36mUnited Airlines
Deal found 9/15$652
This SmartFares deal was found by Cheapflights users on 9/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/227:47 pmONT - NRT
1 stop28h 13mHawaiian Airlines
Wed 10/86:25 pmNRT - ONT
1 stop16h 08mHawaiian Airlines
Deal found 9/15$661
This Trip.com deal was found by Cheapflights users on 9/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/203:06 pmONT - NRT
1 stop32h 54mAlaska Airlines
Fri 10/36:25 pmNRT - ONT
1 stop21h 38mAlaska Airlines
Deal found 9/15$674
This KAYAK deal was found by Cheapflights users on 9/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/226:00 amONT - NRT
1 stop18h 00mAlaska Airlines
Wed 11/56:30 pmNRT - ONT
1 stop13h 47mAlaska Airlines
Deal found 9/17$675
This KAYAK deal was found by Cheapflights users on 9/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/236:00 amONT - NRT
1 stop18h 00mAlaska Airlines
Thu 10/166:25 pmNRT - ONT
1 stop16h 08mAlaska Airlines
Deal found 9/16$677
This SmartFares deal was found by Cheapflights users on 9/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/16:00 amONT - NRT
1 stop18h 00mAlaska Airlines
Thu 10/96:25 pmNRT - ONT
1 stop21h 38mAlaska Airlines
Deal found 9/15$678
This Trip.com deal was found by Cheapflights users on 9/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/163:06 pmONT - NRT
1 stop32h 54mAlaska Airlines
Tue 9/236:25 pmNRT - ONT
1 stop35h 47mAlaska Airlines
Deal found 9/15$683
This KAYAK deal was found by Cheapflights users on 9/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/216:00 amONT - NRT
1 stop18h 00mAlaska Airlines
Tue 9/236:25 pmNRT - ONT
1 stop35h 47mAlaska Airlines
Deal found 9/15$685
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 9/176:04 amONT - DEL
2 stops26h 56mUnited Airlines
Thu 10/211:35 pmDEL - ONT
2 stops25h 46mUnited Airlines
Deal found 9/14$686
This Trip.com deal was found by Cheapflights users on 9/17. 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.
Sun 9/216:00 amONT - NRT
1 stop18h 00mAlaska Airlines
Tue 9/306:25 pmNRT - ONT
1 stop32h 19mAlaska Airlines
Deal found 9/17$686
This Delta deal was found by Cheapflights users on 9/17. 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 10/187:05 amONT - DEL
2 stops30h 20mDelta
Tue 10/283:20 amDEL - ONT
2 stops28h 29mDelta
Deal found 9/17$687
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:18 pmONT - NRT
1 stop27h 42mAlaska Airlines
Thu 1/156:30 pmNRT - ONT
1 stop16h 47mAlaska Airlines
Deal found 9/15$689

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 September 17, 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

Wed 1/28

9:50 am-7:30 pm

1 stop16h 40m

Tokyo Haneda

Wed 2/4

9:20 pm-9:55 pm

1 stop17h 35m

$606

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Mon 1/26

6:00 am-4:00 pm

1 stop17h 00m

Tokyo Narita

Fri 2/6

6:30 pm-3:12 pm

1 stop13h 42m

$607

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Mon 1/12

6:00 am-4:00 pm

1 stop17h 00m

Tokyo Narita

Fri 1/23

6:30 pm-10:37 pm

1 stop21h 07m

$607

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Mon 1/12

6:00 am-4:00 pm

1 stop17h 00m

Tokyo Narita

Wed 1/28

6:30 pm-3:12 pm

1 stop13h 42m

$607

OntarioTokyo

ONT - HND

ONTHND

Ontario

Mon 1/12

9:50 am-7:30 pm

1 stop16h 40m

Tokyo Haneda

Wed 1/28

8:05 pm-9:55 pm

1 stop18h 50m

$631

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Thu 1/15

6:00 am-4:00 pm

1 stop17h 00m

Tokyo Narita

Thu 1/22

6:30 pm-3:12 pm

1 stop13h 42m

$657

OntarioTokyo

ONT - HND

ONTHND

Ontario

Sun 2/15

4:00 pm-2:05 pm

1 stop29h 05m

Tokyo Haneda

Wed 2/25

4:50 pm-3:20 pm

1 stop15h 30m

$665

OntarioNew Delhi

ONT - DEL

ONTDEL

Ontario

Mon 11/10

11:45 am-1:10 am

2 stops23h 55m

New Delhi Indira Gandhi Intl

Sun 11/23

3:20 am-5:09 pm

2 stops27h 19m

$687

OntarioNew Delhi

ONT - DEL

ONTDEL

Ontario

Mon 11/10

6:00 am-1:10 am

2 stops29h 40m

New Delhi Indira Gandhi Intl

Wed 11/26

3:20 am-7:37 pm

2 stops29h 47m

$687

OntarioNew Delhi

ONT - DEL

ONTDEL

Ontario

Fri 10/17

11:48 am-1:55 am

2 stops25h 37m

New Delhi Indira Gandhi Intl

Sat 11/8

3:20 am-7:37 pm

2 stops29h 47m

$687

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

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, September is the cheapest month in which you can book a flight from Ontario to Asia (average of $900). Flying from Ontario to Asia in December is currently the most expensive (average of $1,507). 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 September 17, 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.

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 September 17, 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
215 reviews

Comfort

8.9

Entertainment

8.9

Food

8.8

Boarding

9.0

Crew

9.2

Overall

8.9

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
STARLUX Airlines
8.9
Very good
215 reviews
STARLUX Airlines
8.9
Very good
215 reviews

Comfort

8.9

Entertainment

8.9

Food

8.8

Boarding

9.0

Crew

9.2

Overall

8.9

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
Korean Air
8.4
Very good
1,140 reviews
STARLUX Airlines
8.9
Very good
215 reviews

Comfort

8.9

Entertainment

8.9

Food

8.8

Boarding

9.0

Crew

9.2

Overall

8.9

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
China Airlines
8.3
Very good
768 reviews
STARLUX Airlines
8.9
Very good
215 reviews

Comfort

8.9

Entertainment

8.9

Food

8.8

Boarding

9.0

Crew

9.2

Overall

8.9

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
Delta
8.0
Very good
7,961 reviews
STARLUX Airlines
8.9
Very good
215 reviews

Comfort

8.9

Entertainment

8.9

Food

8.8

Boarding

9.0

Crew

9.2

Overall

8.9

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
United Airlines
7.4
Good
8,926 reviews
STARLUX Airlines
8.9
Very good
215 reviews

Comfort

8.9

Entertainment

8.9

Food

8.8

Boarding

9.0

Crew

9.2

Overall

8.9

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!

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 Hawaiian Airlines can get you from Ontario to Asia in just under 16h 40m. Your travel time can differ by up to 12h 25m. 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?

    $353 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Korean Air and Alaska Airlines, with prices starting from $364 and $379, 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, September is the cheapest month in which you can book a flight from Ontario to Asia (average of $900). Flying from Ontario to Asia in December is currently the most expensive (average of $1,507). 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 Haneda flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Seattle flights
Los Angeles to Narita flights
Los Angeles to Honolulu flights
San Francisco to Las Vegas flights
Los Angeles to LaGuardia flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to O'Hare Intl flights
San Francisco to Newark flights
Los Angeles to San Francisco flights
Los Angeles to Las Vegas flights
San Francisco to Los Angeles flights
Ontario to Seattle flights
San Francisco to Dallas/Fort Worth flights
Los Angeles to Boston flights
Ontario to John F Kennedy Intl flights
San Francisco to O'Hare Intl flights
San Francisco to Haneda flights
Los Angeles to Cancún flights
San Francisco to Ontario flights
San Francisco to Honolulu flights
Los Angeles to Mexico City flights
San Francisco to LaGuardia flights
Santa Ana to Las Vegas flights
San Francisco to Seattle flights
San Francisco to Narita flights
San Francisco to Santa Ana flights
Burbank to Las Vegas flights
Oakland to Las Vegas flights
Los Angeles to Manila flights
Los Angeles to San Jose flights
Los Angeles to Orlando flights
San Jose to Los Angeles flights
Los Angeles to Miami flights
Santa Ana to Seattle flights
Ontario to San Francisco flights
Burbank to Newark flights
Los Angeles to Reagan-National flights
San Francisco to Mexico City flights
Ontario to O'Hare Intl flights
San Jose to Seattle flights
Los Angeles to Suvarnabhumi flights
Ontario to Newark flights
Los Angeles to Portland flights
San Diego to John F Kennedy Intl flights
Los Angeles to Austin flights
Los Angeles to Heathrow 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$486Average$1,108FlexibilityNo cancel feeOn-time69%
Asiana AirlinesCheapest$647Average$727FlexibilityNo cancel feeOn-time76%
DeltaCheapest$686Average$1,066FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$698Average$1,003FlexibilityNo cancel feeOn-time81%
China AirlinesCheapest$706Average$1,033FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$712Average$963FlexibilityNo cancel feeOn-time71%
Philippine AirlinesCheapest$767Average$964FlexibilityNo cancel feeOn-time60%
EVA AirCheapest$780Average$821FlexibilityNo cancel feeOn-time74%
STARLUX AirlinesCheapest$789Average$1,109FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$892Average$1,430FlexibilityNo cancel feeOn-time85%

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.