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$453+ Cheap flights from Osaka (OSA) 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
OSA — ONT
Jun 21 — Jun 281
Sat 6/21
Sat 6/28
1 adult, Economy
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Cheap flight deals from Osaka to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Osaka (OSA) to Ontario (ONT). 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 June 16, 2025.

Round-trip from

$875
(United Airlines)

One-way from

$453
(Kiwi.com)

Popular in

August

Cheapest in

May

Average price

$1,002
From Osaka (OSA) to Ontario
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One-way flight from Osaka (OSA) to Ontario
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Highest demand for flights based on searches. 15% potential increase in price ($183 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Osaka to Ontario

Cheapest flights from Osaka to Ontario
Explore the most affordable flight options available from Osaka to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 16, 2025.

This United Airlines deal was found by Cheapflights users on 6/15. 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 9/184:50 pmKIX - ONT
2 stops19h 53mUnited Airlines
Wed 9/246:38 pmONT - KIX
2 stops28h 12mUnited Airlines
Deal found 6/15$875
This Gotogate deal was found by Cheapflights users on 6/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/201:25 pmKIX - ONT
1 stop19h 40mSTARLUX Airlines
Sat 9/2711:10 pmONT - KIX
1 stop22h 50mSTARLUX Airlines
Deal found 6/15$916
This Gotogate deal was found by Cheapflights users on 6/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/182:00 pmKIX - ONT
1 stop20h 00mChina Airlines
Tue 9/2312:10 amONT - KIX
1 stop20h 40mChina Airlines
Deal found 6/15$996
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1412:35 pmKIX - ONT
2 stops36h 12mDelta
Sun 7/201:15 pmONT - KIX
2 stops59h 50mDelta
Deal found 6/16$1,073
This Trip.com deal was found by Cheapflights users on 6/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/187:35 amKIX - ONT
2 stops26h 25mMultiple Airlines
Tue 9/2312:10 amONT - KIX
2 stops29h 40mMultiple Airlines
Deal found 6/15$1,130
This Agoda.com deal was found by Cheapflights users on 6/14. 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 Agoda.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/2612:35 pmKIX - ONT
2 stops20h 41mKorean Air
Sun 8/176:00 amONT - KIX
2 stops37h 20mKorean Air
Deal found 6/14$1,202
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Wed 12/311:00 pmITM - ONT
2 stops17h 22mUnited Airlines
Tue 1/206:00 amONT - ITM
2 stops19h 10mUnited Airlines
Deal found 6/15$1,874
This Hawaiian Airlines deal was found by Cheapflights users on 6/16. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/178:45 pmKIX - ONT
1 stop16h 42mHawaiian Airlines
Tue 6/249:00 amONT - KIX
1 stop17h 45mHawaiian Airlines
Deal found 6/16$1,907
This American Airlines deal was found by Cheapflights users on 6/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/285:55 pmKIX - ONT
2 stops22h 04mAmerican Airlines
Fri 7/1112:59 amONT - KIX
2 stops25h 46mAmerican Airlines
Deal found 6/14$2,018
This Qatar Airways deal was found by Cheapflights users on 6/14. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/282:50 pmKIX - ONT
3 stops49h 23mQatar Airways
Sat 7/126:00 amONT - KIX
2 stops43h 25mQatar Airways
Deal found 6/14$2,518

Cheapflights Fare Finder

Customize your flight search to find flights from Osaka 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 June 16, 2025.
Use the filters below to find and compare flights from Osaka to Ontario that are best for you.

Fly from

Osaka

Fly to

Ontario

Route

Depart

Return

Price

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Thu 9/18

4:50 pm-8:43 pm

2 stops19h 53m

Ontario

Wed 9/24

6:38 pm-2:50 pm

2 stops28h 12m

$875

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Sat 9/20

1:25 pm-5:05 pm

1 stop19h 40m

Ontario

Sat 9/27

11:10 pm-2:00 pm

1 stop22h 50m

$916

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Thu 9/18

2:00 pm-6:00 pm

1 stop20h 00m

Ontario

Tue 9/23

12:10 am-12:50 pm

1 stop20h 40m

$996

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Mon 7/14

12:35 pm-8:47 am

2 stops36h 12m

Ontario

Sun 7/20

1:15 pm-5:05 pm

2 stops59h 50m

$1,073

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Thu 9/18

7:35 am-6:00 pm

2 stops26h 25m

Ontario

Tue 9/23

12:10 am-9:50 pm

2 stops29h 40m

$1,130

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Sat 7/26

12:35 pm-5:16 pm

2 stops20h 41m

Ontario

Sun 8/17

6:00 am-11:20 am

2 stops37h 20m

$1,202

OsakaOntario

ITM - ONT

ITMONT

Osaka Itami

Tue 7/29

12:00 pm-5:43 pm

2 stops21h 43m

Ontario

Tue 8/5

6:10 am-5:05 pm

2 stops18h 55m

$1,989

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Sat 6/28

5:55 pm-11:59 pm

2 stops22h 04m

Ontario

Fri 7/11

12:59 am-6:45 pm

2 stops25h 46m

$2,018

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Sat 7/26

8:45 pm-9:27 pm

1 stop16h 42m

Ontario

Sun 8/17

9:00 am-6:45 pm

1 stop17h 45m

$2,509

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Sat 6/28

2:50 pm-12:13 am

3 stops49h 23m

Ontario

Sat 7/12

6:00 am-5:25 pm

2 stops43h 25m

$2,518

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Showing 1-10 of 24 results
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Best time to book a flight from Osaka to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Osaka to Ontario (average of $246). Flying from Osaka 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 June 16, 2025.
STARLUX Airlines
9.1
Wonderful
178 reviews

Boarding

9.0

Crew

9.3

Food

8.8

Comfort

9.0

Entertainment

8.9

Overall

9.1

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
9.1
Wonderful
178 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Boarding

9.0

Crew

9.3

Food

8.8

Comfort

9.0

Entertainment

8.9

Overall

9.1

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.
EVA Air
8.4
Very good
1,204 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Boarding

9.0

Crew

9.3

Food

8.8

Comfort

9.0

Entertainment

8.9

Overall

9.1

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
1,090 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Boarding

9.0

Crew

9.3

Food

8.8

Comfort

9.0

Entertainment

8.9

Overall

9.1

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
1,494 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Boarding

9.0

Crew

9.3

Food

8.8

Comfort

9.0

Entertainment

8.9

Overall

9.1

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
740 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Boarding

9.0

Crew

9.3

Food

8.8

Comfort

9.0

Entertainment

8.9

Overall

9.1

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 Osaka 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 Osaka?

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

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

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $506. Korean Air flights start at $532 while deals on United Airlines start at $557 one-way.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Osaka to Ontario (average of $246). Flying from Osaka 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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