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$492+ 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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
OSA — ONT
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$852
(United Airlines)

One-way from

$492
(Delta)

Popular in

August

Cheapest in

May

Average price

$1,172
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 ($178 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 July 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 July 31, 2025.

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.
Wed 11/196:35 pmKIX - ONT
2 stops19h 09mUnited Airlines
Tue 12/26:00 amONT - KIX
1 stop17h 40mUnited Airlines
Deal found 7/30$852
This HIS 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 HIS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/241:25 pmKIX - ONT
1 stop19h 40mSTARLUX Airlines
Sat 9/2711:10 pmONT - KIX
1 stop22h 50mSTARLUX Airlines
Deal found 7/30$866
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2412:35 pmKIX - ONT
2 stops38h 34mDelta
Sun 9/286:00 amONT - KIX
2 stops42h 55mDelta
Deal found 7/30$876
This China 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/91:10 pmKIX - ONT
1 stop20h 50mChina Airlines
Sat 10/1112:10 amONT - KIX
1 stop19h 50mChina Airlines
Deal found 7/31$957
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.
Sat 8/2312:35 pmKIX - ONT
2 stops20h 36mKorean Air
Wed 10/226:37 amONT - KIX
2 stops22h 23mKorean Air
Deal found 7/30$991
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.
Wed 9/242:35 pmITM - ONT
2 stops20h 12mAlaska Airlines
Sun 9/2811:39 amONT - ITM
2 stops40h 06mAlaska Airlines
Deal found 7/29$996
This HIS 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 HIS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/92:00 pmKIX - ONT
2 stops26h 03mMultiple Airlines
Sun 10/1212:10 amONT - KIX
1 stop19h 50mMultiple Airlines
Deal found 7/31$1,008
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.
Wed 8/279:00 pmKIX - ONT
2 stops37h 28mAlaska Airlines
Wed 9/36:00 amONT - KIX
2 stops24h 15mAlaska Airlines
Deal found 7/30$1,010
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/912:00 pmITM - ONT
2 stops26h 52mUnited Airlines
Mon 10/139:36 amONT - ITM
2 stops39h 29mUnited Airlines
Deal found 7/31$1,618

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 July 31, 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

Wed 11/19

6:35 pm-8:44 pm

2 stops19h 09m

Ontario

Tue 12/2

6:00 am-4:40 pm

1 stop17h 40m

$852

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Wed 9/24

1:25 pm-5:05 pm

1 stop19h 40m

Ontario

Sat 9/27

11:10 pm-2:00 pm

1 stop22h 50m

$866

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Wed 9/24

12:35 pm-11:09 am

2 stops38h 34m

Ontario

Sun 9/28

6:00 am-4:55 pm

2 stops42h 55m

$876

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Thu 10/9

1:10 pm-6:00 pm

1 stop20h 50m

Ontario

Sat 10/11

12:10 am-12:00 pm

1 stop19h 50m

$957

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Sat 8/23

12:35 pm-5:11 pm

2 stops20h 36m

Ontario

Wed 10/22

6:37 am-9:00 pm

2 stops22h 23m

$991

OsakaOntario

ITM - ONT

ITMONT

Osaka Itami

Wed 9/24

2:35 pm-6:47 pm

2 stops20h 12m

Ontario

Sun 9/28

11:39 am-7:45 pm

2 stops40h 06m

$996

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Thu 10/9

2:00 pm-12:03 am

2 stops26h 03m

Ontario

Sat 10/11

12:10 am-12:00 pm

1 stop19h 50m

$1,008

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Wed 8/27

9:00 pm-6:28 pm

2 stops37h 28m

Ontario

Wed 9/3

6:00 am-10:15 pm

2 stops24h 15m

$1,010

OsakaOntario

ITM - ONT

ITMONT

Osaka Itami

Thu 10/9

12:00 pm-10:52 pm

2 stops26h 52m

Ontario

Mon 10/13

9:36 am-5:05 pm

2 stops39h 29m

$1,618

OsakaOntario

KIX - ONT

KIXONT

Osaka Kansai Intl

Fri 10/24

12:35 pm-11:39 pm

2 stops27h 04m

$492

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 20 results
1
2

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.

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 July 31, 2025.
Read reviews from past customers who have flown STARLUX Airlines, EVA Air, and Korean Air from Osaka to Ontario. Users can see the overall rating for each airline as well as how each is rated 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.
EVA Air
8.4
Very good
1,220 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.
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 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 $492. Korean Air flights start at $495 while deals on Alaska Airlines start at $501 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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