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Osaka

$399+ 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OSA
Aug 6 — Aug 131
Wed 8/6
Wed 8/13
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 August 1, 2025.

Round-trip from

$845
(Alaska Airlines)

One-way from

$425
(Delta)

Popular in

June

Cheapest in

February

Average price

$810
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. 9% potential increase in price ($94 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 1, 2025.

This United Airlines deal was found by Cheapflights users on 7/31. 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 9/176:00 amONT - KIX
1 stop16h 50mUnited Airlines
Wed 9/244:50 pmKIX - ONT
1 stop16h 47mUnited Airlines
Deal found 7/31$835
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 8/238:35 amONT - KIX
1 stop18h 10mAlaska Airlines
Thu 9/48:45 pmKIX - ONT
1 stop16h 25mAlaska Airlines
Deal found 7/30$845
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:45 amONT - KIX
2 stops21h 15mDelta
Tue 12/92:00 pmKIX - ONT
2 stops20h 17mDelta
Deal found 7/29$855
This Korean Air deal was found by Cheapflights users on 7/30. 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.
Sun 11/96:43 amONT - KIX
2 stops37h 07mKorean Air
Thu 11/1311:55 amKIX - ONT
2 stops22h 22mKorean Air
Deal found 7/30$860
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:00 amONT - ITM
2 stops21h 45mAlaska Airlines
Wed 9/172:35 pmITM - ONT
2 stops20h 12mAlaska Airlines
Deal found 7/29$928
This oojo deal was found by Cheapflights users on 7/30. 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.
Wed 9/1711:10 pmONT - KIX
1 stop22h 50mSTARLUX Airlines
Mon 9/221:25 pmKIX - ONT
1 stop19h 40mSTARLUX Airlines
Deal found 7/30$931
This United Airlines deal was found by Cheapflights users on 7/31. 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 11/36:00 amONT - ITM
2 stops19h 10mUnited Airlines
Fri 11/141:00 pmITM - ONT
2 stops16h 37mUnited Airlines
Deal found 7/31$940
This Gotogate deal was found by Cheapflights users on 7/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2312:45 amONT - KIX
1 stop25h 20mChina Airlines
Tue 9/92:00 pmKIX - ONT
1 stop20h 40mChina Airlines
Deal found 7/30$948
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/126:10 amONT - ITM
2 stops20h 30mAmerican Airlines
Fri 9/197:25 amITM - ONT
2 stops20h 30mAmerican Airlines
Deal found 7/29$1,157
This Japan Airlines deal was found by Cheapflights users on 7/30. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:00 amONT - ITM
2 stops21h 45mJapan Airlines
Thu 9/182:35 pmITM - ONT
2 stops20h 12mJapan Airlines
Deal found 7/30$1,364
This United Airlines deal was found by Cheapflights users on 7/30. 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 9/116:00 amONT - ITM
3 stops20h 10mMultiple Airlines
Thu 9/1811:00 amITM - ONT
2 stops22h 37mMultiple Airlines
Deal found 7/30$1,405
This oojo deal was found by Cheapflights users on 7/30. 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.
Wed 8/612:45 amONT - ITM
2 stops40h 05mChina Airlines
Mon 8/112:50 pmITM - ONT
2 stops43h 50mChina Airlines
Deal found 7/30$5,387

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 August 1, 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 1/12

9:50 am-6:45 pm

1 stop39h 55m

Osaka Kansai Intl

Tue 1/27

8:45 pm-9:55 pm

1 stop18h 10m

$807

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Wed 9/17

6:00 am-2:50 pm

1 stop16h 50m

Osaka Kansai Intl

Wed 9/24

4:50 pm-5:37 pm

1 stop16h 47m

$835

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Tue 12/2

6:45 am-9:00 pm

2 stops21h 15m

Osaka Kansai Intl

Fri 12/12

11:55 am-5:17 pm

2 stops22h 22m

$855

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Sun 11/9

6:43 am-12:50 pm

2 stops37h 07m

Osaka Kansai Intl

Thu 11/13

11:55 am-5:17 pm

2 stops22h 22m

$860

OntarioOsaka

ONT - ITM

ONTITM

Ontario

Mon 9/8

6:00 am-7:45 pm

2 stops21h 45m

Osaka Itami

Wed 9/17

2:35 pm-6:47 pm

2 stops20h 12m

$928

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Wed 9/17

11:10 pm-2:00 pm

1 stop22h 50m

Osaka Kansai Intl

Mon 9/22

1:25 pm-5:05 pm

1 stop19h 40m

$931

OntarioOsaka

ONT - ITM

ONTITM

Ontario

Mon 11/3

6:00 am-6:10 pm

2 stops19h 10m

Osaka Itami

Fri 11/14

1:00 pm-12:37 pm

2 stops16h 37m

$940

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Sat 8/23

12:45 am-6:05 pm

1 stop25h 20m

Osaka Kansai Intl

Tue 9/9

2:00 pm-6:40 pm

1 stop20h 40m

$948

OntarioOsaka

ONT - ITM

ONTITM

Ontario

Tue 10/14

6:00 am-7:50 pm

2 stops21h 50m

Osaka Itami

Tue 11/18

11:30 am-3:17 pm

2 stops20h 47m

$1,142

OntarioOsaka

ONT - ITM

ONTITM

Ontario

Fri 9/12

6:10 am-6:40 pm

2 stops20h 30m

Osaka Itami

Fri 9/19

7:25 am-11:55 am

2 stops20h 30m

$1,157

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 24 results
1
2
3

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 $877). Flying from Ontario to Osaka in June is currently the most expensive (average of $1,312). 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 August 1, 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.

Reviews of airlines servicing Osaka

Get insights into the airlines that provide service to Osaka. 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 Osaka. Reviews last updated August 1, 2025.
See what other customers who have flown with STARLUX Airlines, Korean Air, and Japan Airlines from Ontario to Osaka 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
199 reviews

Food

8.8

Entertainment

8.9

Comfort

8.9

Boarding

9.0

Crew

9.3

Overall

9.0

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
199 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Food

8.8

Entertainment

8.9

Comfort

8.9

Boarding

9.0

Crew

9.3

Overall

9.0

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.
Korean Air
8.4
Very good
1,121 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Food

8.8

Entertainment

8.9

Comfort

8.9

Boarding

9.0

Crew

9.3

Overall

9.0

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.
Japan Airlines
8.3
Very good
1,536 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Food

8.8

Entertainment

8.9

Comfort

8.9

Boarding

9.0

Crew

9.3

Overall

9.0

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
754 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Food

8.8

Entertainment

8.9

Comfort

8.9

Boarding

9.0

Crew

9.3

Overall

9.0

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.
Alaska Airlines
8.0
Very good
10,000 reviews
STARLUX Airlines
9.0
Wonderful
199 reviews

Food

8.8

Entertainment

8.9

Comfort

8.9

Boarding

9.0

Crew

9.3

Overall

9.0

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 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.

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

    Our cheapest airline available from Ontario to Osaka is Alaska Airlines. Our recent data shows that you can find tickets from as low as $845 on this airline. Additional options worth looking into are Korean Air and Delta, starting at $860 and $862 round-trip.

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

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $425. However, be on the lookout for offers from United Airlines and Korean Air, 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 $877). Flying from Ontario to Osaka in June is currently the most expensive (average of $1,312). 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 August 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$826Average$1,087FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$1,039Average$1,176FlexibilityNo cancel feeOn-time70%

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