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$305+ 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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — ONT
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
1 adult, Economy
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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 September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$488
(Hanatour)

One-way from

$305
(Trip.com)

Popular in

January

Cheapest in

March

Average price

$720

Good round-trip deal

$829 or less

Good one-way deal

$566 or less
Provider with most accurate pricing for Manila Ninoy Aquino Intl-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Manila Ninoy Aquino Intl-Los Angeles flights.
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From Asia to Ontario
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One-way flight from Asia to Ontario
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Highest demand for flights based on searches. 10% potential increase in price ($96 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Asia to Ontario.
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Price to beat on a one-way flight from Asia to Ontario.
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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 September 29, 2025.

This Hanatour deal was found by Cheapflights users on 9/28. 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/104:50 pmICN - ONT
1 stop22h 02mUnited Airlines
Mon 10/206:27 pmONT - ICN
2 stops41h 53mUnited Airlines
Deal found 9/28$488
This United Airlines deal was found by Cheapflights users on 9/27. 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 10/2311:30 amICN - ONT
1 stop16h 43mUnited Airlines
Sun 10/265:05 amONT - ICN
2 stops31h 35mUnited Airlines
Deal found 9/27$491
This United Airlines deal was found by Cheapflights users on 9/28. 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 12/3112:45 pmICN - ONT
1 stop14h 16mUnited Airlines
Thu 1/226:00 amONT - ICN
1 stop17h 15mUnited Airlines
Deal found 9/28$512
This United Airlines deal was found by Cheapflights users on 9/26. 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.
Tue 11/2512:45 pmICN - ONT
1 stop16h 52mUnited Airlines
Thu 4/304:15 pmONT - ICN
2 stops30h 45mUnited Airlines
Deal found 9/26$540
This United Airlines deal was found by Cheapflights users on 9/26. 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 10/2211:30 amICN - ONT
1 stop16h 43mUnited Airlines
Wed 3/186:00 amONT - ICN
1 stop17h 15mUnited Airlines
Deal found 9/26$543
This flugladen.de deal was found by Cheapflights users on 9/29. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/178:35 pmICN - ONT
1 stop19h 28mHawaiian Airlines
Thu 10/309:45 amONT - ICN
1 stop17h 40mHawaiian Airlines
Deal found 9/29$561
This KAYAK deal was found by Cheapflights users on 9/26. 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 12/288:35 pmICN - ONT
1 stop30h 15mAlaska Airlines
Sun 1/256:00 amONT - ICN
1 stop19h 35mAlaska Airlines
Deal found 9/26$579
This Hanatour deal was found by Cheapflights users on 9/28. 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/107:20 pmICN - ONT
1 stop31h 48mDelta
Mon 10/205:50 pmONT - ICN
1 stop30h 40mDelta
Deal found 9/28$585
This Alaska Airlines deal was found by Cheapflights users on 9/27. 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.
Sat 10/118:35 pmICN - ONT
1 stop19h 28mAlaska Airlines
Sat 10/186:00 amONT - ICN
2 stops45h 00mAlaska Airlines
Deal found 9/27$588
This Alaska Airlines deal was found by Cheapflights users on 9/28. 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.
Thu 10/238:35 pmICN - ONT
1 stop19h 28mAlaska Airlines
Thu 10/309:45 amONT - ICN
1 stop17h 40mAlaska Airlines
Deal found 9/28$589
This Delta deal was found by Cheapflights users on 9/28. 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 12/267:40 pmICN - ONT
1 stop21h 14mDelta
Tue 1/206:45 amONT - ICN
1 stop16h 45mDelta
Deal found 9/28$593
This Delta deal was found by Cheapflights users on 9/27. 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 10/97:20 pmICN - ONT
1 stop19h 21mDelta
Wed 10/226:00 amONT - ICN
1 stop17h 20mDelta
Deal found 9/27$594

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 September 29, 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 10/28

11:55 am-12:37 pm

1 stop16h 42m

Ontario

Mon 11/3

5:05 am-5:40 am

2 stops31h 35m

$491

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 2/19

12:45 pm-12:18 pm

1 stop16h 33m

Ontario

Tue 2/24

6:00 am-4:15 pm

1 stop17h 15m

$491

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 2/2

12:45 pm-5:43 pm

1 stop21h 58m

Ontario

Fri 2/6

6:00 am-4:15 pm

1 stop17h 15m

$502

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 10/29

11:55 am-12:37 pm

1 stop16h 42m

Ontario

Tue 11/4

6:38 pm-5:40 am

1 stop18h 02m

$512

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 1/28

12:45 pm-10:53 pm

1 stop27h 08m

Ontario

Tue 2/10

1:53 pm-5:40 am

1 stop22h 47m

$513

TokyoOntario

HND - ONT

HNDONT

Tokyo Haneda

Thu 1/29

4:25 pm-5:43 pm

1 stop18h 18m

Ontario

Sun 2/8

1:20 pm-2:50 pm

2 stops32h 30m

$561

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sat 10/11

8:35 pm-12:03 am

1 stop19h 28m

Ontario

Sat 10/18

6:00 am-7:00 pm

2 stops45h 00m

$588

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sun 3/1

8:35 pm-10:37 pm

1 stop19h 02m

Ontario

Sun 3/15

6:00 am-6:35 pm

1 stop20h 35m

$589

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 10/24

8:35 pm-12:03 am

1 stop19h 28m

Ontario

Sun 3/22

6:00 am-6:35 pm

1 stop20h 35m

$589

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 3/5

8:35 pm-10:37 pm

1 stop19h 02m

Ontario

Thu 3/19

6:00 am-6:35 pm

1 stop20h 35m

$589

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/27

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, August is the cheapest month in which you can book a flight from Asia to Ontario (average of $246). Flying from Asia to Ontario in March is currently the most expensive (average of $327). 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 September 29, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Asia to Ontario as you normally would.

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 September 29, 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
216 reviews

Boarding

9.0

Comfort

8.9

Overall

8.9

Food

8.7

Crew

9.2

Entertainment

8.8

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
216 reviews
STARLUX Airlines
8.9
Very good
216 reviews

Boarding

9.0

Comfort

8.9

Overall

8.9

Food

8.7

Crew

9.2

Entertainment

8.8

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
767 reviews
STARLUX Airlines
8.9
Very good
216 reviews

Boarding

9.0

Comfort

8.9

Overall

8.9

Food

8.7

Crew

9.2

Entertainment

8.8

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
8,924 reviews
STARLUX Airlines
8.9
Very good
216 reviews

Boarding

9.0

Comfort

8.9

Overall

8.9

Food

8.7

Crew

9.2

Entertainment

8.8

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, Alaska Airlines, and Delta can get you from Asia to Ontario in just under 16h 29m. Your travel time can differ by up to 2h 59m. The distance between Asia and Ontario is about 5505 mi. This flight may include one or multiple stops.

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

    $366 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 Korean Air and Delta, with prices starting from $402 and $416, 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, Taipei City Taiwan Taoyuan Intl - Ontario or Tokyo Narita - 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, August is the cheapest month in which you can book a flight from Asia to Ontario (average of $246). Flying from Asia to Ontario in March is currently the most expensive (average of $327). 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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See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Asia to Ontario

Discover the top 3 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 September 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$702FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$691Average$919FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$771Average$911FlexibilityNo cancel feeOn-timeN/A

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