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$431+ Cheap flights from Ontario (ONT) to Japan

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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — FUK
May 25 — Jun 11
Mon 5/25
Mon 6/1
1 adult, Economy
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Cheap flight deals from Ontario to Japan

Cheapest flights from Ontario to Japan
Explore the most affordable flight options available from Ontario to Japan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 25, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/218:33 pm
ONT
-
NRT
1 stop31h 27m
Multiple Airlines
Fri 8/289:30 pm
NRT
-
ONT
1 stop29h 28m
Multiple Airlines
Deal found 4/20$737
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/238:33 pm
ONT
-
NRT
1 stop31h 27m
Multiple Airlines
Fri 9/49:30 pm
NRT
-
ONT
1 stop29h 28m
Multiple Airlines
Deal found 4/24$757
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/98:39 pm
ONT
-
NRT
1 stop31h 21m
Multiple Airlines
Wed 8/1910:30 am
NRT
-
ONT
1 stop23h 22m
Multiple Airlines
Deal found 4/25$780
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:10 am
ONT
-
NRT
1 stop18h 50m
Multiple Airlines
Sat 5/164:25 pm
NRT
-
ONT
1 stop34h 26m
Multiple Airlines
Deal found 4/20$821
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/98:39 pm
ONT
-
NRT
1 stop31h 21m
Multiple Airlines
Sat 8/229:30 pm
NRT
-
ONT
1 stop29h 28m
Multiple Airlines
Deal found 4/24$837
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/228:33 pm
ONT
-
NRT
1 stop31h 27m
Multiple Airlines
Tue 8/259:30 pm
NRT
-
ONT
1 stop31h 12m
Multiple Airlines
Deal found 4/23$849
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/98:39 pm
ONT
-
NRT
1 stop31h 21m
Multiple Airlines
Sun 8/239:30 pm
NRT
-
ONT
2 stops57h 39m
Multiple Airlines
Deal found 4/24$855
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:39 pm
ONT
-
NRT
1 stop31h 21m
Multiple Airlines
Fri 8/2110:30 am
NRT
-
ONT
1 stop23h 22m
Multiple Airlines
Deal found 4/24$864
This Delta deal was found by Cheapflights users on 4/23. 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.
Sun 8/237:00 am
ONT
-
HND
1 stop15h 20m
Delta
Fri 9/114:20 pm
HND
-
ONT
1 stop16h 56m
Delta
Deal found 4/23$970
This Delta deal was found by Cheapflights users on 4/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/127:00 am
ONT
-
HND
1 stop15h 20m
Delta
Fri 9/114:20 pm
HND
-
ONT
1 stop16h 56m
Delta
Deal found 4/21$971
This Delta deal was found by Cheapflights users on 4/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:05 pm
ONT
-
HND
2 stops29h 15m
Delta
Thu 9/104:20 pm
HND
-
ONT
2 stops15h 54m
Delta
Deal found 4/21$975
This United Airlines deal was found by Cheapflights users on 4/23. 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 8/241:18 pm
ONT
-
HND
2 stops37h 42m
United Airlines
Thu 8/273:50 pm
HND
-
ONT
1 stop20h 14m
United Airlines
Deal found 4/23$1,003

Find flight deals from Ontario to Japan

Keep the following information in mind while searching for Ontario to Japan flight deals. Data was last updated April 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$692
(Kiwi.com)

One-way from

$431
(SmartFares)

Popular in

June

Cheapest in

January

Average price

$838
Provider with most accurate pricing for Los Angeles Los Angeles-Tokyo (TYO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles Los Angeles-Tokyo (TYO) flights.
Search Deals
From Ontario to Japan
Search Deals
One-way flight from Ontario to Japan
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($127 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Japan 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 April 25, 2026.
Use the filters below to find and compare flights from Ontario to Japan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Sat 8/22

5:45 am-2:50 pm

2 stops41h 05m

Osaka Kansai Intl

Tue 8/25

4:55 pm-10:58 pm

1 stop22h 03m

$1,028

OntarioOsaka

ONT - ITM

ONTITM

Ontario

Mon 8/31

6:00 am-5:05 pm

2 stops19h 05m

Osaka Itami

Wed 9/2

12:50 pm-10:58 pm

2 stops26h 08m

$1,029

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Sun 8/9

6:00 am-2:50 pm

1 stop16h 50m

Osaka Kansai Intl

Wed 8/19

4:55 pm-12:12 pm

1 stop35h 17m

$1,030

OntarioOsaka

ONT - ITM

ONTITM

Ontario

Sun 8/9

6:00 am-7:50 pm

2 stops21h 50m

Osaka Itami

Wed 8/19

8:20 am-1:31 pm

2 stops21h 11m

$1,049

OntarioTokyo

ONT - HND

ONTHND

Ontario

Mon 7/27

6:00 am-1:55 pm

1 stop15h 55m

Tokyo Haneda

Sun 8/16

10:55 pm-12:12 pm

1 stop29h 17m

$1,081

OntarioFukuoka

ONT - FUK

ONTFUK

Ontario

Wed 8/26

12:45 am-9:55 am

1 stop17h 10m

Fukuoka

Tue 9/1

9:00 pm-6:40 pm

1 stop37h 40m

$1,140

OntarioTokyo

ONT - HND

ONTHND

Ontario

Sun 8/23

5:05 pm-2:20 pm

2 stops29h 15m

Tokyo Haneda

Mon 8/31

4:05 pm-9:01 am

2 stops32h 56m

$1,150

OntarioTokyo

ONT - NRT

ONTNRT

Ontario

Sun 8/16

6:00 am-3:25 pm

1 stop17h 25m

Tokyo Narita

Sat 9/19

5:05 pm-8:04 pm

1 stop18h 59m

$1,161

OntarioOsaka

ONT - KIX

ONTKIX

Ontario

Tue 9/15

7:00 am-10:40 pm

2 stops23h 40m

Osaka Kansai Intl

Wed 9/23

9:05 am-10:40 pm

2 stops29h 35m

$1,195

OntarioNagoya

ONT - NGO

ONTNGO

Ontario

Sun 8/9

12:45 am-11:20 am

1 stop18h 35m

Nagoya Chubu Centrair Intl

Thu 9/10

12:20 pm-6:40 pm

1 stop22h 20m

$1,199

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from Ontario to Japan

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

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

Currently, November is the cheapest month in which you can book a flight from Ontario to Japan (average of $258). Flying from Ontario to Japan in May is currently the most expensive (average of $853). 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 Japan

Get insights into the airlines that provide service to Japan. 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 Japan. Reviews last updated April 25, 2026.
See what other customers who have flown with China Airlines,Alaska Airlines, andDelta from Ontario to Japan 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
818 reviews

Overall

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

A,Feb 2026

SEA - TPE

China Airlines has improved significantly over the years. This is the first time we fly on their business class after 20+ years. Both hardware and services impressed us. Will definitely fly with again in the future.
China Airlines
8.3
Very good
818 reviews
China Airlines
8.3
Very good
818 reviews

Overall

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

A,Feb 2026

SEA - TPE

China Airlines has improved significantly over the years. This is the first time we fly on their business class after 20+ years. Both hardware and services impressed us. Will definitely fly with again in the future.
Alaska Airlines
7.9
Good
12,288 reviews
China Airlines
8.3
Very good
818 reviews

Overall

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

A,Feb 2026

SEA - TPE

China Airlines has improved significantly over the years. This is the first time we fly on their business class after 20+ years. Both hardware and services impressed us. Will definitely fly with again in the future.
Delta
7.9
Good
8,459 reviews
China Airlines
8.3
Very good
818 reviews

Overall

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

A,Feb 2026

SEA - TPE

China Airlines has improved significantly over the years. This is the first time we fly on their business class after 20+ years. Both hardware and services impressed us. Will definitely fly with again in the future.
United Airlines
7.4
Good
9,653 reviews
China Airlines
8.3
Very good
818 reviews

Overall

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

A,Feb 2026

SEA - TPE

China Airlines has improved significantly over the years. This is the first time we fly on their business class after 20+ years. Both hardware and services impressed us. Will definitely fly with again in the future.
American Airlines
7.1
Good
11,673 reviews
China Airlines
8.3
Very good
818 reviews

Overall

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Boarding

8.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

A,Feb 2026

SEA - TPE

China Airlines has improved significantly over the years. This is the first time we fly on their business class after 20+ years. Both hardware and services impressed us. Will definitely fly with again in the future.

Related info for your journey

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

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Japan. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • How long is the flight from Ontario to Japan?

    Airlines like United Airlines, American Airlines, and China Airlines fly from Ontario to Japan in about 17h 10m. The time it takes to get you to your destination can typically vary by up to 4h 40m. Airlines will cover a distance of 6009 mi. This flight may include one or multiple stops.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $52. Delta flights start at $64 while deals on United Airlines start at $174 one-way.

  • What are the most popular routes from Ontario to Japan?

    The most popular flight routes from Ontario to Japan are Ontario - Tokyo Narita, Ontario - Tokyo Haneda and Ontario - Osaka Kansai Intl.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Ontario to Japan (average of $258). Flying from Ontario to Japan in May is currently the most expensive (average of $853). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 4 airlines flying from Ontario to Japan

Discover the top 4 airlines that operate flights from Ontario to Japan. 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 April 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$632Average$1,206FlexibilityNo cancel feeOn-time70%
DeltaCheapest$743Average$1,161FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$783Average$990FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$820Average$1,090FlexibilityNo cancel feeOn-time69%

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