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Osaka

$359+ Cheap flights from Ontario (ONT) to Osaka (OSA)

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.
ONT — OSA
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Ontario to Osaka

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Osaka (OSA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 17, 2025.

Round-trip from

$627
(Alaska Airlines)

One-way from

$359
(SmartFares)

Popular in

June

Cheapest in

February

Average price

$732
From Ontario to Osaka (OSA)
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One-way flight from Ontario to Osaka (OSA)
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Highest demand for flights based on searches. 12% potential increase in price ($118 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Osaka

Cheapest flights from Ontario to Osaka
Explore the most affordable flight options available from Ontario to Osaka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3010:09 amONT - KIX
1 stop16h 36mAlaska Airlines
Tue 10/78:45 pmKIX - ONT
1 stop15h 52mAlaska Airlines
Deal found 9/14$721
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/17:50 amONT - KIX
1 stop17h 55mAlaska Airlines
Tue 12/98:45 pmKIX - ONT
1 stop16h 38mAlaska Airlines
Deal found 9/16$746
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:00 amONT - KIX
1 stop17h 40mUnited Airlines
Tue 11/256:35 pmKIX - ONT
1 stop21h 16mUnited Airlines
Deal found 9/16$756
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/87:36 amONT - KIX
1 stop18h 09mAlaska Airlines
Tue 12/98:45 pmKIX - ONT
1 stop16h 38mAlaska Airlines
Deal found 9/17$758
This Korean Air 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/217:35 amONT - KIX
2 stops21h 25mKorean Air
Wed 10/2911:55 amKIX - ONT
2 stops21h 15mKorean Air
Deal found 9/15$766
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/106:00 amONT - KIX
1 stop17h 40mUnited Airlines
Mon 11/246:35 pmKIX - ONT
1 stop15h 59mUnited Airlines
Deal found 9/17$776
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.
Thu 11/276:00 amONT - KIX
1 stop17h 40mUnited Airlines
Fri 12/126:35 pmKIX - ONT
2 stops19h 07mUnited Airlines
Deal found 9/15$781
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/206:36 pmONT - KIX
1 stop28h 14mUnited Airlines
Mon 11/36:35 pmKIX - ONT
1 stop15h 59mUnited Airlines
Deal found 9/17$783
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3011:59 pmONT - KIX
2 stops26h 51mAmerican Airlines
Thu 11/65:50 pmKIX - ONT
2 stops23h 07mAmerican Airlines
Deal found 9/15$794
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 9/246:00 amONT - KIX
1 stop16h 50mUnited Airlines
Fri 10/34:50 pmKIX - ONT
1 stop22h 02mUnited Airlines
Deal found 9/14$796
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.
Sun 11/91:40 pmONT - KIX
1 stop34h 00mUnited Airlines
Thu 11/136:35 pmKIX - ONT
1 stop21h 16mUnited Airlines
Deal found 9/14$803
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.
Sun 12/76:00 amONT - ITM
2 stops20h 55mAlaska Airlines
Tue 12/162:40 pmITM - ONT
2 stops17h 41mAlaska Airlines
Deal found 9/15$864

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Osaka 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 Osaka that are best for you.

Fly from

Ontario

Fly to

Osaka

Route

Depart

Return

Price

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Mon 1/26

9:50 am-6:45 pm

1 stop39h 55m

Osaka Kansai Intl

Mon 2/9

8:45 pm-9:55 pm

1 stop18h 10m

$677

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Mon 1/12

6:00 am-4:40 pm

1 stop17h 40m

Osaka Kansai Intl

Wed 1/28

6:35 pm-8:58 pm

2 stops19h 23m

$715

OntarioOsaka

ONT - ITM

ONTITM

Ontario

Mon 1/26

6:00 am-6:10 pm

2 stops19h 10m

Osaka Itami

Thu 2/26

1:00 pm-12:18 pm

2 stops16h 18m

$717

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Mon 12/1

7:50 am-6:45 pm

1 stop17h 55m

Osaka Kansai Intl

Tue 12/9

8:45 pm-8:23 pm

1 stop16h 38m

$746

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Sat 1/10

9:50 am-6:45 pm

1 stop39h 55m

Osaka Kansai Intl

Sat 1/24

8:45 pm-9:55 pm

1 stop18h 10m

$747

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Wed 2/11

9:50 am-6:45 pm

1 stop39h 55m

Osaka Kansai Intl

Wed 3/11

8:45 pm-9:55 pm

1 stop17h 10m

$750

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Mon 1/26

6:00 am-7:25 pm

2 stops20h 25m

Osaka Kansai Intl

Mon 2/9

6:35 pm-5:43 pm

1 stop16h 08m

$760

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Tue 10/21

7:35 am-9:00 pm

2 stops21h 25m

Osaka Kansai Intl

Mon 11/3

2:00 pm-5:10 pm

2 stops44h 10m

$766

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Sun 11/9

1:40 pm-4:40 pm

1 stop34h 00m

Osaka Kansai Intl

Thu 11/13

6:35 pm-10:51 pm

1 stop21h 16m

$803

OntarioOsaka

ONT - ITM

ONTITM

Ontario

Wed 2/11

6:00 am-6:10 pm

2 stops19h 10m

Osaka Itami

Wed 3/11

1:00 pm-10:45 pm

2 stops25h 45m

$810

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 41 results
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Best time to book a flight from Ontario to Osaka

Have a flexible travel schedule? Discover the best time to fly to Osaka 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 Osaka

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

Currently, February is the cheapest month in which you can book a flight from Ontario to Osaka (average of $859). Flying from Ontario to Osaka in June is currently the most expensive (average of $1,309). 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 OSA?

Find hourly flight availability from Ontario to Osaka. 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.

A simple way to save on the total cost of your ticket is to fly from Ontario to Osaka in the morning. If you’re flexible enough to do this you can expect to save up to 26% on your trip compared to booking a flight at noon.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Osaka. 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 Osaka?

    Most people fly from Ontario (ONT) if they book a flight from Ontario to Osaka. On average, Ontario has 0 outbound flights to Osaka per day from 2 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

  • How long is the flight from Ontario to Osaka?

    A quick flight from Ontario to Osaka can take about 17h 40m. Alaska Airlines provides one of the quickest options available for as low as $715. There are 5759 mi between Ontario and Osaka. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Ontario to Osaka round-trip?

    Our cheapest airline available from Ontario to Osaka is United Airlines. Our recent data shows that you can find tickets from as low as $826 on this airline. An additional option worth looking into is China Airlines, starting at $1,032.

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

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $379. However, be on the lookout for offers from Japan Airlines and United Airlines, as they are both options that can get you from Ontario to Osaka for a low price.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Ontario to Osaka (average of $859). Flying from Ontario to Osaka in June is currently the most expensive (average of $1,309). 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

Traveling to a place near Osaka?

Book flights to Osaka if you plan to visit one of these locations
Nara
Nishinomiya

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Top 2 airlines flying from Ontario to Osaka

Discover the top 2 airlines that operate flights from Ontario to Osaka. 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$826Average$1,087FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$1,032Average$1,176FlexibilityNo cancel feeOn-time70%

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