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$342+ Cheap flights from Ontario (ONT) to Java

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 3/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CGK
Feb 11 — Feb 181
Wed 2/11
Wed 2/18
1 adult, Economy
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Cheap flight deals from Ontario to Java

Keep the following information in mind while searching for Ontario to Java flight deals. Data was last updated January 12, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$615
(Korean Air)

One-way from

$342
(Korean Air)

Popular in

June

Cheapest in

November

Average price

$830
Provider with most accurate pricing for Los Angeles-Jakarta (JKT) flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Jakarta (JKT) flights.
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From Ontario to Java
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One-way flight from Ontario to Java
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Highest demand for flights based on searches. 18% potential increase in price ($204 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Ontario to Java

Cheapest flights from Ontario to Java
Explore the most affordable flight options available from Ontario to Java. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 12, 2026.

This Korean Air deal was found by Cheapflights users on 1/12. 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.
Mon 3/166:00 am
ONT
-
CGK
2 stops48h 20m
Korean Air
Wed 3/259:50 pm
CGK
-
ONT
2 stops38h 44m
Korean Air
Deal found 1/12$615
This United Airlines deal was found by Cheapflights users on 1/11. 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 9/216:53 pm
ONT
-
CGK
2 stops31h 07m
United Airlines
Thu 9/247:00 am
CGK
-
ONT
2 stops30h 06m
United Airlines
Deal found 1/11$715
This United Airlines deal was found by Cheapflights users on 1/12. 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 4/275:10 am
ONT
-
CGK
2 stops28h 35m
United Airlines
Wed 5/136:10 am
CGK
-
ONT
2 stops25h 37m
United Airlines
Deal found 1/12$721
This United Airlines deal was found by Cheapflights users on 1/10. 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 2/96:00 am
ONT
-
CGK
2 stops43h 15m
United Airlines
Mon 2/166:20 am
CGK
-
ONT
2 stops31h 37m
United Airlines
Deal found 1/10$724
This United Airlines deal was found by Cheapflights users on 1/9. 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.
Sun 2/86:39 pm
ONT
-
CGK
2 stops54h 36m
United Airlines
Sun 2/156:20 am
CGK
-
ONT
2 stops31h 37m
United Airlines
Deal found 1/9$729
This United Airlines deal was found by Cheapflights users on 1/10. 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 8/46:00 am
ONT
-
CGK
2 stops51h 45m
United Airlines
Wed 9/26:10 am
CGK
-
ONT
2 stops49h 37m
United Airlines
Deal found 1/10$747
This Korean Air deal was found by Cheapflights users on 1/12. 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.
Tue 3/316:00 am
ONT
-
CGK
2 stops48h 10m
Korean Air
Mon 4/139:50 pm
CGK
-
ONT
2 stops33h 25m
Korean Air
Deal found 1/12$770
This United Airlines deal was found by Cheapflights users on 1/11. 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 9/176:00 am
ONT
-
SUB
2 stops46h 20m
United Airlines
Mon 9/214:30 pm
SUB
-
ONT
2 stops39h 17m
United Airlines
Deal found 1/11$826
This United Airlines deal was found by Cheapflights users on 1/10. 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 7/226:30 pm
ONT
-
CGK
2 stops39h 15m
United Airlines
Mon 8/37:00 am
CGK
-
ONT
2 stops30h 06m
United Airlines
Deal found 1/10$833
This United Airlines deal was found by Cheapflights users on 1/11. 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 2/96:00 am
ONT
-
CGK
2 stops43h 15m
United Airlines
Sat 4/182:20 pm
CGK
-
ONT
2 stops46h 25m
United Airlines
Deal found 1/11$872
This United Airlines deal was found by Cheapflights users on 1/12. 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 3/29:06 pm
ONT
-
CGK
2 stops41h 54m
United Airlines
Thu 4/22:20 pm
CGK
-
ONT
2 stops46h 25m
United Airlines
Deal found 1/12$876
This Korean Air deal was found by Cheapflights users on 1/10. 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.
Fri 4/247:30 am
ONT
-
CGK
2 stops42h 35m
Korean Air
Mon 4/279:50 pm
CGK
-
ONT
2 stops33h 25m
Korean Air
Deal found 1/10$889

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Java 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 January 12, 2026.
Use the filters below to find and compare flights from Ontario to Java that are best for you.

Fly from

Ontario

Fly to

Java

Route

Depart

Return

Price

OntarioJakarta

ONT - CGK

ONTCGK

Ontario

Tue 3/17

6:00 am-8:20 pm

2 stops48h 20m

Jakarta Soekarno-Hatta Intl

Tue 3/31

9:50 pm-5:13 pm

2 stops33h 23m

$615

OntarioJakarta

ONT - CGK

ONTCGK

Ontario

Wed 3/11

6:00 am-8:20 pm

2 stops48h 20m

Jakarta Soekarno-Hatta Intl

Wed 3/25

9:50 pm-10:34 pm

2 stops38h 44m

$615

OntarioJakarta

ONT - CGK

ONTCGK

Ontario

Tue 2/3

6:00 am-6:00 am

2 stops33h 00m

Jakarta Soekarno-Hatta Intl

Tue 2/17

7:15 am-12:48 pm

2 stops44h 33m

$721

OntarioJakarta

ONT - CGK

ONTCGK

Ontario

Mon 2/9

6:00 am-4:15 pm

2 stops43h 15m

Jakarta Soekarno-Hatta Intl

Mon 2/16

6:20 am-10:57 pm

2 stops31h 37m

$724

OntarioJakarta

ONT - CGK

ONTCGK

Ontario

Tue 3/31

6:00 am-8:10 pm

2 stops48h 10m

Jakarta Soekarno-Hatta Intl

Mon 4/13

9:50 pm-5:15 pm

2 stops33h 25m

$770

OntarioJakarta

ONT - CGK

ONTCGK

Ontario

Mon 2/9

6:00 am-4:15 pm

2 stops43h 15m

Jakarta Soekarno-Hatta Intl

Sat 4/18

2:20 pm-10:45 pm

2 stops46h 25m

$872

OntarioJakarta

ONT - CGK

ONTCGK

Ontario

Tue 4/21

12:10 am-12:30 am

1 stop34h 20m

Jakarta Soekarno-Hatta Intl

Sun 4/26

1:30 am-6:00 pm

1 stop30h 30m

$897

OntarioJakarta

ONT - CGK

ONTCGK

Ontario

Mon 3/30

12:10 am-1:35 pm

1 stop23h 25m

Jakarta Soekarno-Hatta Intl

Sun 4/12

1:30 am-6:00 pm

1 stop30h 30m

$897

OntarioJakarta

ONT - CGK

ONTCGK

Ontario

Wed 1/28

5:05 am-11:55 pm

2 stops27h 50m

Jakarta Soekarno-Hatta Intl

Tue 2/3

7:15 am-10:53 pm

2 stops30h 38m

$941

OntarioSurabaya

ONT - SUB

ONTSUB

Ontario

Sun 3/15

11:50 pm-10:25 am

2 stops44h 35m

Surabaya Juanda

Sun 3/22

7:00 pm-5:50 pm

2 stops36h 50m

$1,187

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/10

Showing 1-10 of 21 results
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Best time to book a flight from Ontario to Java

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

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

Currently, November is the cheapest month in which you can book a flight from Ontario to Java (average of $584). Flying from Ontario to Java in June is currently the most expensive (average of $975). 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.

Related info for your journey

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

    If you book a flight to Java from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • How long is the flight from Ontario to Java?

    A quick flight from Ontario to Java can take about 33h. Korean Air provides one of the quickest options available for as low as $721. Airlines will cover a distance of 9012 mi. This flight may include one or multiple stops.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Ontario to Java (average of $584). Flying from Ontario to Java in June is currently the most expensive (average of $975). 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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Top 3 airlines flying from Ontario to Java

Discover the top 3 airlines that operate flights from Ontario to Java. 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 January 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
STARLUX AirlinesCheapest$812Average$1,091FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$880Average$1,040FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$1,015Average$1,029FlexibilityNo cancel feeOn-time69%

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