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Ontario

$334+ Cheap flights from Asia to Ontario (ONT)

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — ONT
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Find flight deals from Asia to Ontario

Cheapest flights from Asia to Ontario
Explore the most affordable flight options available from Asia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2025.

This United Airlines deal was found by Cheapflights users on 11/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1612:45 pmICN - ONT
1 stop16h 52mUnited Airlines
Sun 11/235:05 amONT - ICN
2 stops31h 35mUnited Airlines
Deal found 11/13$504
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/156:00 pmICN - ONT
2 stops35h 32mUnited Airlines
Fri 3/136:00 amONT - ICN
1 stop17h 15mUnited Airlines
Deal found 11/12$506
This United Airlines deal was found by Cheapflights users on 11/11. 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 11/126:00 pmICN - ONT
1 stop21h 51mUnited Airlines
Sun 11/165:05 amONT - ICN
2 stops31h 35mUnited Airlines
Deal found 11/11$508
This Kissandfly.com deal was found by Cheapflights users on 11/12. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1412:45 pmICN - ONT
1 stop27h 06mLufthansa
Thu 11/276:00 amONT - ICN
1 stop17h 15mLufthansa
Deal found 11/12$528
This oojo deal was found by Cheapflights users on 11/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2211:50 amMNL - ONT
1 stop20h 00mSTARLUX Airlines
Mon 1/129:45 pmONT - MNL
1 stop21h 20mSTARLUX Airlines
Deal found 11/10$558
This United Airlines deal was found by Cheapflights users on 11/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2112:45 pmICN - ONT
1 stop16h 52mUnited Airlines
Wed 3/117:15 pmONT - ICN
1 stop17h 25mUnited Airlines
Deal found 11/13$573
This United Airlines deal was found by Cheapflights users on 11/11. 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 12/812:45 pmICN - ONT
1 stop16h 32mUnited Airlines
Wed 3/187:15 pmONT - ICN
1 stop17h 25mUnited Airlines
Deal found 11/11$574
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/244:25 pmHND - ONT
2 stops37h 13mUnited Airlines
Tue 12/305:05 amONT - HND
2 stops40h 45mUnited Airlines
Deal found 11/12$599
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/244:45 pmNRT - ONT
2 stops36h 53mUnited Airlines
Tue 12/306:39 pmONT - NRT
1 stop27h 21mUnited Airlines
Deal found 11/12$600
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/174:45 pmNRT - ONT
1 stop12h 32mUnited Airlines
Tue 1/66:00 amONT - NRT
1 stop16h 00mUnited Airlines
Deal found 11/12$601
This Delta deal was found by Cheapflights users on 11/12. 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.
Fri 11/148:05 pmICN - ONT
1 stop19h 50mDelta
Wed 11/266:45 amONT - ICN
1 stop16h 45mDelta
Deal found 11/12$616
This Delta deal was found by Cheapflights users on 11/11. 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 12/258:05 pmICN - ONT
1 stop14h 03mDelta
Mon 1/57:30 amONT - ICN
1 stop16h 00mDelta
Deal found 11/11$619

Cheap flight deals from Asia to Ontario

Keep the following information in mind while searching for Asia to Ontario flight deals. Data was last updated November 13, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$504
(United Airlines)

One-way from

$334
(Trip.com)

Popular in

January

Cheapest in

September

Average price

$744

Good round-trip deal

$1,586 or less

Good one-way deal

$518 or less
Provider with most accurate pricing for Manila Ninoy Aquino Intl-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Manila Ninoy Aquino Intl-Los Angeles flights.
Search Deals
From Asia to Ontario
Search Deals
One-way flight from Asia to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($89 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Asia to Ontario.
Search Deals
Price to beat on a one-way flight from Asia to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Asia to Ontario 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 November 13, 2025.
Use the filters below to find and compare flights from Asia to Ontario that are best for you.

Fly from

Asia

Fly to

Ontario

Route

Depart

Return

Price

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Tue 2/17

6:00 pm-5:41 pm

1 stop16h 41m

Ontario

Sat 2/28

1:53 pm-4:15 pm

1 stop33h 22m

$504

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sat 2/21

6:00 pm-5:41 pm

1 stop16h 41m

Ontario

Mon 3/2

8:55 pm-5:40 am

1 stop15h 45m

$506

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Tue 2/10

12:45 pm-8:58 pm

2 stops25h 13m

Ontario

Sat 2/14

6:00 am-4:15 pm

1 stop17h 15m

$506

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 12/15

6:00 pm-5:37 pm

1 stop16h 37m

Ontario

Fri 3/13

6:00 am-3:15 pm

1 stop17h 15m

$506

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 11/24

12:45 pm-8:44 pm

2 stops24h 59m

Ontario

Fri 11/28

8:38 pm-4:15 pm

1 stop26h 37m

$508

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 3/13

8:35 pm-11:32 pm

1 stop18h 57m

Ontario

Fri 3/20

6:00 am-6:35 pm

1 stop20h 35m

$571

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 1/30

8:35 pm-11:56 pm

1 stop20h 21m

Ontario

Fri 2/6

6:00 am-6:35 pm

1 stop19h 35m

$571

TokyoOntario

HND - ONT

HNDONT

Tokyo Haneda

Fri 2/6

4:25 pm-8:58 pm

2 stops21h 33m

Ontario

Sat 2/14

1:45 pm-2:50 pm

2 stops32h 05m

$583

TokyoOntario

HND - ONT

HNDONT

Tokyo Haneda

Fri 1/23

4:25 pm-10:53 pm

1 stop23h 28m

Ontario

Thu 2/5

6:00 am-2:50 pm

1 stop15h 50m

$584

TokyoOntario

NRT - ONT

NRTONT

Tokyo Narita

Wed 1/21

4:45 pm-10:53 pm

1 stop23h 08m

Ontario

Wed 1/28

1:53 pm-3:00 pm

1 stop32h 07m

$585

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 60 results
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Best time to book a flight from Asia to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Asia 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 Asia to Ontario

What is the cheapest month to book a flight from Asia to Ontario?

Currently, December is the cheapest month in which you can book a flight from Asia to Ontario (average of $253). Flying from Asia to Ontario in May is currently the most expensive (average of $437). 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 AS to ONT?

Find hourly flight availability from Asia to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 13, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 16% on flights from Asia to Ontario by exploring options for tickets in the morning.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated November 13, 2025.
See what other customers who have flown with STARLUX Airlines, China Airlines, and United Airlines from Asia to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very good
227 reviews

Crew

9.2

Boarding

8.9

Overall

8.9

Food

8.7

Entertainment

8.8

Comfort

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
227 reviews
STARLUX Airlines
8.9
Very good
227 reviews

Crew

9.2

Boarding

8.9

Overall

8.9

Food

8.7

Entertainment

8.8

Comfort

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
778 reviews
STARLUX Airlines
8.9
Very good
227 reviews

Crew

9.2

Boarding

8.9

Overall

8.9

Food

8.7

Entertainment

8.8

Comfort

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
9,015 reviews
STARLUX Airlines
8.9
Very good
227 reviews

Crew

9.2

Boarding

8.9

Overall

8.9

Food

8.7

Entertainment

8.8

Comfort

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 Asia to Ontario. 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 into for flights to Ontario from Asia?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Ontario from Asia.

  • How long is the flight from Asia to Ontario?

    United Airlines, China Airlines, and Delta can get you from Asia to Ontario in just under 16h 41m. Your travel time can differ by up to 5h 14m. The distance between Asia and Ontario is about 6006 mi. This flight may include one or multiple stops.

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

    $373 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Alaska Airlines and China Airlines, with prices starting from $379 and $409, respectively.

  • What are the most popular routes from Asia to Ontario?

    When deciding which route to take from Asia to Ontario consider Incheon Intl - Ontario, Tokyo Narita - Ontario or Taipei City Taiwan Taoyuan Intl - Ontario as they are the most popular.

  • Can I find deals for flights from Asia to Ontario that include hotel bookings?

    Yes. In addition to deals on Asia to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Asia to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Asia to Ontario.

  • Can I find deals for business class flights from Asia to Ontario?

    Yes. Cheapflights offers flight deals from Asia to Ontario 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 Asia to Ontario?

    Currently, December is the cheapest month in which you can book a flight from Asia to Ontario (average of $253). Flying from Asia to Ontario in May is currently the most expensive (average of $437). 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 Asia to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Asia to Ontario

Discover the top 2 airlines that operate flights from Asia to Ontario. 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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$684Average$945FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$750Average$911FlexibilityNo cancel feeOn-timeN/A

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