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Slovenia

$625+ Cheap flights from Ontario (ONT) to Slovenia

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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LJU
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap flight deals from Ontario to Slovenia

Keep the following information in mind while searching for Ontario to Slovenia flight deals. Data was last updated August 14, 2025.

Round-trip from

$776
(Delta)

One-way from

$625
(Orbitz)

Popular in

December

Cheapest in

November

Average price

$840
From Ontario to Slovenia
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One-way flight from Ontario to Slovenia
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Highest demand for flights based on searches. 6% potential increase in price ($71 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($73 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Ontario to Slovenia

Cheapest flights from Ontario to Slovenia
Explore the most affordable flight options available from Ontario to Slovenia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This British Airways deal was found by Cheapflights users on 8/14. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/154:54 pmONT - LJU
2 stops17h 26mBritish Airways
Fri 8/229:05 pmLJU - ONT
2 stops28h 01mBritish Airways
Deal found 8/14$872
This United deal was found by Cheapflights users on 8/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/125:05 amONT - LJU
2 stops22h 40mMultiple Airlines
Fri 12/196:45 amLJU - ONT
2 stops19h 58mMultiple Airlines
Deal found 8/13$1,263
This United deal was found by Cheapflights users on 8/12. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:39 pmONT - LJU
3 stops30h 16mMultiple Airlines
Sun 1/46:35 amLJU - ONT
2 stops20h 08mMultiple Airlines
Deal found 8/12$2,068
This British Airways deal was found by Cheapflights users on 8/13. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1512:45 pmONT - LJU
2 stops18h 25mBritish Airways
Wed 10/16:00 pmLJU - ONT
2 stops33h 12mBritish Airways
Deal found 8/13$2,335
This American Airlines deal was found by Cheapflights users on 8/13. 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 9/2012:47 pmONT - LJU
2 stops22h 53mMultiple Airlines
Sat 10/411:00 amLJU - ONT
2 stops20h 33mMultiple Airlines
Deal found 8/13$3,775
This KAYAK deal was found by Cheapflights users on 8/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/192:57 pmONT - LJU
2 stops17h 18mBritish Airways
Sat 8/3011:00 amLJU - ONT
2 stops20h 48mBritish Airways
Deal found 8/13$10,238
This Orbitz deal was found by Cheapflights users on 8/13. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/22:57 pmONT - LJU
2 stops17h 18mBritish Airways
Sat 9/2011:00 amLJU - ONT
2 stops20h 33mBritish Airways
Deal found 8/13$12,938
This Orbitz deal was found by Cheapflights users on 8/14. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/102:54 pmONT - LJU
2 stops17h 56mBritish Airways
Wed 9/176:00 pmLJU - ONT
2 stops33h 12mBritish Airways
Deal found 8/14$14,813

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Slovenia 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 August 14, 2025.
Use the filters below to find and compare flights from Ontario to Slovenia that are best for you.

Fly from

Ontario

Fly to

Slovenia

Route

Depart

Return

Price

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

Wed 11/12

6:00 am-11:40 am

2 stops20h 40m

Ljubljana Joze Pucnik

Sun 11/16

12:25 pm-11:46 pm

2 stops44h 21m

$776

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

Fri 12/12

5:05 am-12:45 pm

2 stops22h 40m

Ljubljana Joze Pucnik

Fri 12/19

6:45 am-5:43 pm

2 stops19h 58m

$1,263

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

Thu 12/25

6:39 pm-9:55 am

3 stops30h 16m

Ljubljana Joze Pucnik

Sun 1/4

6:35 am-5:43 pm

2 stops20h 08m

$2,068

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

Mon 9/15

12:45 pm-4:10 pm

2 stops18h 25m

Ljubljana Joze Pucnik

Wed 10/1

6:00 pm-6:12 pm

2 stops33h 12m

$2,335

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

Sat 9/20

12:47 pm-8:40 pm

2 stops22h 53m

Ljubljana Joze Pucnik

Sat 10/4

11:00 am-10:33 pm

2 stops20h 33m

$3,775

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

Tue 9/2

2:57 pm-5:15 pm

2 stops17h 18m

Ljubljana Joze Pucnik

Sat 9/20

11:00 am-10:33 pm

2 stops20h 33m

$12,938

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

Wed 9/10

2:54 pm-5:50 pm

2 stops17h 56m

Ljubljana Joze Pucnik

Wed 9/17

6:00 pm-6:12 pm

2 stops33h 12m

$14,813

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

Sat 9/20

1:10 pm-8:40 pm

2 stops22h 30m

$625

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

Sat 9/20

7:00 am-9:45 am

2 stops17h 45m

$635

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

Tue 10/7

2:51 pm-5:15 pm

2 stops17h 24m

$1,604

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Best time to book a flight from Ontario to Slovenia

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

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

Currently, February is the cheapest month in which you can book a flight from Ontario to Slovenia (average of $710). Flying from Ontario to Slovenia in June is currently the most expensive (average of $1,444). 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 Slovenia. 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 Slovenia?

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

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Ontario to Slovenia (average of $710). Flying from Ontario to Slovenia in June is currently the most expensive (average of $1,444). 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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