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Ontario

$347+ 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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ONT
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$524
(United Airlines)

One-way from

$347
(Trip.com)

Popular in

January

Cheapest in

March

Average price

$981

Good one-way deal

$748 or less
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 ($94 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 August 2025
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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 August 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 9/1011:30 amICN - ONT
2 stops41h 02mUnited Airlines
Fri 9/125:10 amONT - ICN
2 stops31h 10mUnited Airlines
Deal found 8/13$524
This Trip.com deal was found by Cheapflights users on 8/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/411:30 amICN - ONT
1 stop16h 43mUnited Airlines
Wed 9/176:50 pmONT - ICN
1 stop17h 30mUnited Airlines
Deal found 8/13$530
This United Airlines deal was found by Cheapflights users on 8/13. 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 11/76:00 pmICN - ONT
2 stops35h 33mUnited Airlines
Sat 11/156:38 pmONT - ICN
1 stop28h 37mUnited Airlines
Deal found 8/13$574
This Alaska Airlines deal was found by Cheapflights users on 8/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/188:35 pmICN - ONT
1 stop19h 28mAlaska Airlines
Thu 3/56:00 amONT - ICN
1 stop19h 35mAlaska Airlines
Deal found 8/13$594
This Alaska Airlines deal was found by Cheapflights users on 8/14. 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.
Sat 10/258:35 pmICN - ONT
1 stop19h 28mAlaska Airlines
Sat 11/16:00 amONT - ICN
1 stop20h 35mAlaska Airlines
Deal found 8/14$595
This Alaska Airlines deal was found by Cheapflights users on 8/14. 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.
Sun 9/288:35 pmICN - ONT
1 stop30h 09mAlaska Airlines
Thu 10/27:47 pmONT - ICN
1 stop30h 48mAlaska Airlines
Deal found 8/14$610
This Trip.com deal was found by Cheapflights users on 8/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/204:25 pmHND - ONT
1 stop13h 12mUnited Airlines
Thu 11/271:40 pmONT - HND
1 stop32h 10mUnited Airlines
Deal found 8/13$636
This Trip.com deal was found by Cheapflights users on 8/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/124:30 pmNRT - ONT
1 stop16h 59mUnited Airlines
Tue 9/166:50 pmONT - NRT
1 stop27h 50mUnited Airlines
Deal found 8/12$637
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Tue 12/234:25 pmHND - ONT
2 stops37h 13mUnited Airlines
Wed 1/71:00 pmONT - HND
2 stops32h 50mUnited Airlines
Deal found 8/12$637
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Thu 11/204:45 pmNRT - ONT
1 stop12h 52mUnited Airlines
Thu 11/276:05 amONT - NRT
1 stop40h 25mUnited Airlines
Deal found 8/13$638
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Tue 8/264:50 pmICN - ONT
1 stop16h 47mUnited Airlines
Wed 9/106:50 pmONT - ICN
1 stop17h 30mUnited Airlines
Deal found 8/13$639
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Thu 9/115:10 pmNRT - ONT
1 stop19h 23mUnited Airlines
Mon 9/151:42 pmONT - NRT
1 stop32h 58mUnited Airlines
Deal found 8/12$639

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 August 14, 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 9/2

11:30 am-12:13 pm

1 stop16h 43m

Ontario

Tue 9/9

6:50 pm-4:20 am

1 stop17h 30m

$524

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 9/10

4:50 pm-5:29 pm

2 stops40h 39m

Ontario

Fri 9/26

6:27 pm-4:20 am

2 stops41h 53m

$524

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 11/7

6:00 pm-10:45 pm

1 stop21h 45m

Ontario

Sat 11/15

6:38 pm-4:15 pm

1 stop28h 37m

$524

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 9/3

4:50 pm-5:37 pm

1 stop16h 47m

Ontario

Sun 9/7

6:00 am-3:00 pm

1 stop17h 00m

$524

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 9/12

11:30 am-12:13 pm

1 stop16h 43m

Ontario

Thu 9/18

6:50 pm-4:20 am

1 stop17h 30m

$524

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 11/7

6:00 pm-5:34 pm

1 stop16h 34m

Ontario

Mon 2/2

6:42 pm-5:40 am

1 stop17h 58m

$524

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 9/10

11:30 am-5:37 pm

1 stop22h 07m

Ontario

Fri 9/12

6:50 pm-4:20 am

1 stop17h 30m

$524

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 10/31

5:00 pm-8:44 pm

2 stops43h 44m

Ontario

Fri 11/28

8:38 pm-4:15 pm

1 stop26h 37m

$524

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 12/25

12:45 pm-10:01 am

1 stop14h 16m

Ontario

Wed 1/7

5:40 am-5:40 am

2 stops31h 00m

$524

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 9/3

4:50 pm-5:37 pm

1 stop16h 47m

Ontario

Thu 9/11

6:00 am-3:00 pm

1 stop17h 00m

$524

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

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 $328). 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 August 14, 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 August 14, 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
9.0
Wonderful
204 reviews

Boarding

9.0

Comfort

8.9

Entertainment

8.9

Food

8.7

Overall

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.0
Wonderful
204 reviews
STARLUX Airlines
9.0
Wonderful
204 reviews

Boarding

9.0

Comfort

8.9

Entertainment

8.9

Food

8.7

Overall

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
762 reviews
STARLUX Airlines
9.0
Wonderful
204 reviews

Boarding

9.0

Comfort

8.9

Entertainment

8.9

Food

8.7

Overall

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
United Airlines
7.4
Good
8,916 reviews
STARLUX Airlines
9.0
Wonderful
204 reviews

Boarding

9.0

Comfort

8.9

Entertainment

8.9

Food

8.7

Overall

9.0

Crew

9.3

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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.

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

    $369 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 STARLUX Airlines and Delta, with prices starting from $428 and $442, 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 $328). 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$735FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$708Average$899FlexibilityNo cancel feeOn-time70%

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