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Osaka

$395+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OSA
Jan 21 — Jan 281
Wed 1/21
Wed 1/28
1 adult, Economy
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Cheap 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 December 22, 2025.

This United Airlines deal was found by Cheapflights users on 12/20. 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 12/296:00 amONT - KIX
1 stop17h 40mUnited Airlines
Sun 1/118:20 amKIX - ONT
2 stops26h 23mUnited Airlines
Deal found 12/20$1,249
This United Airlines deal was found by Cheapflights users on 12/19. 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 12/316:00 amONT - KIX
1 stop17h 40mUnited Airlines
Sat 1/108:20 amKIX - ONT
2 stops20h 57mUnited Airlines
Deal found 12/19$1,326
This United Airlines deal was found by Cheapflights users on 12/19. 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 12/316:00 amONT - ITM
2 stops19h 10mUnited Airlines
Sat 1/101:00 pmITM - ONT
2 stops16h 17mUnited Airlines
Deal found 12/19$1,584
This oojo deal was found by Cheapflights users on 12/21. 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.
Mon 12/2210:50 pmONT - KIX
1 stop21h 30mChina Airlines
Mon 3/232:30 pmKIX - ONT
1 stop19h 20mChina Airlines
Deal found 12/21$1,622
This oojo deal was found by Cheapflights users on 12/19. 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.
Mon 12/229:45 pmONT - KIX
1 stop20h 25mSTARLUX Airlines
Mon 1/1212:20 pmKIX - ONT
1 stop20h 30mSTARLUX Airlines
Deal found 12/19$1,636
This oojo deal was found by Cheapflights users on 12/19. 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.
Fri 12/269:45 pmONT - KIX
1 stop20h 25mSTARLUX Airlines
Wed 12/3112:20 pmKIX - ONT
1 stop20h 30mSTARLUX Airlines
Deal found 12/19$1,637
This United Airlines deal was found by Cheapflights users on 12/21. 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 12/231:40 pmONT - KIX
2 stops58h 00mUnited Airlines
Mon 12/296:35 pmKIX - ONT
2 stops19h 32mUnited Airlines
Deal found 12/21$1,832
This oojo deal was found by Cheapflights users on 12/21. 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.
Mon 12/229:45 pmONT - KIX
1 stop20h 25mSTARLUX Airlines
Mon 12/2912:20 pmKIX - ONT
1 stop20h 30mSTARLUX Airlines
Deal found 12/21$1,875
This oojo deal was found by Cheapflights users on 12/19. 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.
Mon 12/229:45 pmONT - KIX
1 stop20h 25mSTARLUX Airlines
Sat 1/1012:20 pmKIX - ONT
1 stop20h 30mSTARLUX Airlines
Deal found 12/19$1,920
This oojo deal was found by Cheapflights users on 12/21. 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.
Sun 12/2110:50 pmONT - KIX
1 stop19h 45mChina Airlines
Mon 3/232:30 pmKIX - ONT
1 stop19h 20mChina Airlines
Deal found 12/21$1,951
This United Airlines deal was found by Cheapflights users on 12/19. 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 12/226:00 amONT - ITM
2 stops19h 10mUnited Airlines
Sat 1/101:00 pmITM - ONT
2 stops16h 17mUnited Airlines
Deal found 12/19$2,075
This oojo deal was found by Cheapflights users on 12/21. 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.
Tue 12/2310:50 pmONT - ITM
2 stops28h 40mChina Airlines
Mon 12/292:45 pmITM - ONT
2 stops43h 05mChina Airlines
Deal found 12/21$5,376

Find 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 December 22, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$703
(Delta)

One-way from

$395
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$945
Provider with most accurate pricing for Ontario-Osaka (OSA) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Osaka (OSA) flights.
Search Deals
From Ontario to Osaka (OSA)
Search Deals
One-way flight from Ontario to Osaka (OSA)
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($154 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 22, 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

Wed 1/14

6:00 am-4:40 pm

1 stop17h 40m

Osaka Kansai Intl

Wed 1/21

6:35 pm-10:53 pm

1 stop21h 18m

$739

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Tue 2/17

6:10 am-4:40 pm

1 stop17h 30m

Osaka Kansai Intl

Tue 2/24

6:35 pm-8:50 pm

2 stops19h 15m

$744

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Fri 1/9

6:00 am-4:40 pm

1 stop17h 40m

Osaka Kansai Intl

Fri 1/16

6:35 pm-12:47 pm

2 stops35h 12m

$782

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Wed 2/18

8:41 am-6:45 pm

1 stop17h 04m

Osaka Kansai Intl

Wed 3/4

8:45 pm-10:15 pm

1 stop18h 30m

$783

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Wed 2/18

8:41 am-6:45 pm

1 stop17h 04m

Osaka Kansai Intl

Wed 2/25

8:45 pm-10:15 pm

1 stop18h 30m

$783

OntarioOsaka

ONT - ITM

ONTITM

Ontario

Fri 1/16

11:59 pm-7:55 pm

2 stops26h 56m

Osaka Itami

Fri 1/23

1:40 pm-5:22 pm

2 stops20h 42m

$789

OntarioOsaka

ONT - ITM

ONTITM

Ontario

Mon 1/19

11:59 pm-7:55 pm

2 stops26h 56m

Osaka Itami

Mon 1/26

2:40 pm-5:22 pm

2 stops19h 42m

$790

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Wed 2/25

6:09 am-4:40 pm

1 stop17h 31m

Osaka Kansai Intl

Wed 3/11

6:35 pm-8:50 pm

2 stops18h 15m

$791

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Tue 1/13

7:30 am-8:45 pm

2 stops20h 15m

Osaka Kansai Intl

Wed 1/21

11:55 am-10:51 pm

2 stops27h 56m

$823

OntarioOsaka

ONT - ITM

ONTITM

Ontario

Fri 1/9

6:00 am-7:55 pm

2 stops20h 55m

Osaka Itami

Sat 1/17

2:40 pm-8:36 pm

2 stops22h 56m

$882

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/19

Showing 1-10 of 40 results
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Compare providers for flights from Ontario to Osaka

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Osaka in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Osaka flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Osaka flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Osaka flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Osaka flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Osaka flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, January is the cheapest month in which you can book a flight from Ontario to Osaka (average of $527). Flying from Ontario to Osaka in July is currently the most expensive (average of $778). 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 December 22, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Osaka in the afternoon. If you’re flexible enough to do this you can expect to save up to 33% 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 December 22, 2025.
See what other customers who have flown with China 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.
China Airlines
8.3
Very good
792 reviews

Crew

8.5

Comfort

8.0

Entertainment

8.0

Food

7.8

Overall

8.3

Boarding

8.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.
China Airlines
8.3
Very good
792 reviews
China Airlines
8.3
Very good
792 reviews

Crew

8.5

Comfort

8.0

Entertainment

8.0

Food

7.8

Overall

8.3

Boarding

8.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.

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. United Airlines provides one of the quickest options available for as low as $739. 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 $998.

  • 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, January is the cheapest month in which you can book a flight from Ontario to Osaka (average of $527). Flying from Ontario to Osaka in July is currently the most expensive (average of $778). 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

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Alternative routes for Ontario to Osaka

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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 December 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$826Average$1,128FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$998Average$1,214FlexibilityNo cancel feeOn-time70%

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