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$311+ 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 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BKK
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
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 January 20, 2026.

This SmartFares deal was found by Cheapflights users on 1/18. 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 2/26:00 am
ONT
-
NRT
1 stop17h 00m
Hawaiian Airlines
Wed 2/186:30 pm
NRT
-
ONT
1 stop21h 14m
Hawaiian Airlines
Deal found 1/18$591
This Korean Air deal was found by Cheapflights users on 1/19. 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.
Mon 9/77:00 am
ONT
-
HKG
2 stops24h 30m
Korean Air
Wed 9/95:55 pm
HKG
-
ONT
2 stops38h 21m
Korean Air
Deal found 1/19$614
This SmartFares deal was found by Cheapflights users on 1/18. 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 2/186:14 am
ONT
-
NRT
1 stop16h 46m
Hawaiian Airlines
Wed 3/46:30 pm
NRT
-
ONT
1 stop21h 14m
Hawaiian Airlines
Deal found 1/18$616
This SmartFares deal was found by Cheapflights users on 1/20. 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 2/186:14 am
ONT
-
NRT
1 stop16h 46m
Multiple Airlines
Wed 3/46:30 pm
NRT
-
ONT
1 stop21h 14m
Multiple Airlines
Deal found 1/20$617
This SmartFares deal was found by Cheapflights users on 1/19. 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 2/186:14 am
ONT
-
NRT
1 stop16h 46m
Hawaiian Airlines
Wed 2/256:30 pm
NRT
-
ONT
1 stop21h 14m
Hawaiian Airlines
Deal found 1/19$620
This Kiwi.com deal was found by Cheapflights users on 1/19. 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.
Tue 2/176:14 am
ONT
-
NRT
1 stop16h 46m
Multiple Airlines
Wed 2/256:30 pm
NRT
-
ONT
1 stop33h 38m
Multiple Airlines
Deal found 1/19$626
This SmartFares deal was found by Cheapflights users on 1/18. 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 2/26:00 am
ONT
-
NRT
1 stop17h 00m
Hawaiian Airlines
Mon 2/96:30 pm
NRT
-
ONT
1 stop22h 26m
Hawaiian Airlines
Deal found 1/18$627
This SmartFares deal was found by Cheapflights users on 1/20. 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.
Thu 2/196:14 am
ONT
-
NRT
1 stop16h 46m
Multiple Airlines
Thu 2/266:30 pm
NRT
-
ONT
1 stop13h 38m
Multiple Airlines
Deal found 1/20$628
This Kiwi.com deal was found by Cheapflights users on 1/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/16:00 am
ONT
-
NRT
1 stop17h 00m
Multiple Airlines
Tue 2/106:30 pm
NRT
-
ONT
1 stop19h 06m
Multiple Airlines
Deal found 1/17$635
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 2/186:14 am
ONT
-
NRT
1 stop16h 46m
Multiple Airlines
Wed 2/256:30 pm
NRT
-
ONT
1 stop13h 38m
Multiple Airlines
Deal found 1/19$636
This Delta deal was found by Cheapflights users on 1/19. 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 1/297:30 am
ONT
-
HKG
2 stops23h 40m
Delta
Thu 3/1212:35 pm
HKG
-
ONT
2 stops24h 58m
Delta
Deal found 1/19$638
This SmartFares deal was found by Cheapflights users on 1/18. 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.
Tue 3/36:14 am
ONT
-
NRT
1 stop16h 46m
Hawaiian Airlines
Tue 3/176:30 pm
NRT
-
ONT
1 stop20h 14m
Hawaiian Airlines
Deal found 1/18$640

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 January 20, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$591
(SmartFares)

One-way from

$311
(SmartFares)

Popular in

December

Cheapest in

September

Average price

$805

Good round-trip deal

$700 or less

Good one-way deal

$408 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. 6% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 20, 2026.
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

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Tue 2/10

7:30 am-11:10 pm

2 stops23h 40m

Hong Kong Intl

Tue 3/3

12:35 pm-11:49 pm

2 stops27h 14m

$638

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Wed 4/15

7:30 am-10:30 pm

2 stops24h 00m

Hong Kong Intl

Thu 4/30

12:20 pm-5:15 pm

2 stops19h 55m

$638

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Tue 2/10

7:30 am-11:10 pm

2 stops23h 40m

Hong Kong Intl

Sat 2/21

12:55 am-11:49 pm

2 stops38h 54m

$638

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Wed 4/15

7:30 am-10:30 pm

2 stops24h 00m

Hong Kong Intl

Wed 4/29

12:20 pm-5:15 pm

2 stops19h 55m

$638

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Mon 2/9

7:30 am-11:10 pm

2 stops23h 40m

Hong Kong Intl

Sat 2/28

12:55 am-10:37 pm

2 stops37h 42m

$638

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Mon 4/13

7:30 am-10:30 pm

2 stops24h 00m

Hong Kong Intl

Wed 4/29

12:20 pm-5:15 pm

2 stops19h 55m

$638

OntarioHong Kong

ONT - HKG

ONTHKG

Ontario

Sun 2/1

7:30 am-11:20 am

2 stops35h 50m

Hong Kong Intl

Tue 3/10

12:35 pm-10:33 pm

2 stops24h 58m

$638

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Mon 2/2

6:00 am-4:00 pm

1 stop17h 00m

Tokyo Narita

Tue 2/17

6:30 pm-11:08 am

1 stop33h 38m

$643

OntarioManila

ONT - MNL

ONTMNL

Ontario

Mon 3/30

6:00 am-10:05 pm

2 stops25h 05m

Manila Ninoy Aquino Intl

Mon 4/6

1:10 am-5:13 pm

2 stops31h 03m

$706

OntarioManila

ONT - MNL

ONTMNL

Ontario

Tue 3/31

6:00 am-11:59 pm

2 stops26h 59m

Manila Ninoy Aquino Intl

Wed 4/8

11:30 pm-5:13 pm

2 stops32h 43m

$706

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/18

Showing 1-10 of 60 results
1
2
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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 $351). Flying from Ontario to Asia in June is currently the most expensive (average of $528). 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 January 20, 2026.

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 January 20, 2026.
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
267 reviews

Entertainment

8.8

Food

8.6

Comfort

8.8

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
STARLUX Airlines
8.9
Very good
267 reviews
STARLUX Airlines
8.9
Very good
267 reviews

Entertainment

8.8

Food

8.6

Comfort

8.8

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
Korean Air
8.4
Very good
1,187 reviews
STARLUX Airlines
8.9
Very good
267 reviews

Entertainment

8.8

Food

8.6

Comfort

8.8

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
China Airlines
8.3
Very good
799 reviews
STARLUX Airlines
8.9
Very good
267 reviews

Entertainment

8.8

Food

8.6

Comfort

8.8

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
Delta
7.9
Good
8,080 reviews
STARLUX Airlines
8.9
Very good
267 reviews

Entertainment

8.8

Food

8.6

Comfort

8.8

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
United Airlines
7.4
Good
9,183 reviews
STARLUX Airlines
8.9
Very good
267 reviews

Entertainment

8.8

Food

8.6

Comfort

8.8

Boarding

8.9

Crew

9.1

Overall

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

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, United Airlines, and American Airlines can get you from Ontario to Asia in just under 19h 30m. Your travel time can differ by up to 7h 50m. 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?

    $330 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 $351). Flying from Ontario to Asia in June is currently the most expensive (average of $528). 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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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 January 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$486Average$1,074FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$637Average$983FlexibilityNo cancel feeOn-time81%
DeltaCheapest$644Average$947FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$647Average$728FlexibilityNo cancel feeOn-time76%
China AirlinesCheapest$648Average$978FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$654Average$1,073FlexibilityNo 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$938Average$1,216FlexibilityNo cancel feeOn-time72%

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