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$640+ Cheap flights from Ontario (ONT) to Slovenia

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LJU
nov. 22 — nov. 291
sáb. 11/22
sáb. 11/29
1 adult, Economy
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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 octubre 23, 2025.

This United deal was found by Cheapflights users on 10/22. 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.
mié. 11/57:00 amONT - LJU
2 stops17h 55mMultiple Airlines
mar. 11/116:35 amLJU - ONT
2 stops19h 59mMultiple Airlines
Deal found 10/22$642
This KLM deal was found by Cheapflights users on 10/22. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/127:05 amONT - LJU
2 stops19h 35mKLM
dom. 11/1612:25 pmLJU - ONT
2 stops43h 39mKLM
Deal found 10/22$754
This United deal was found by Cheapflights users on 10/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/225:05 amONT - LJU
2 stops22h 30mMultiple Airlines
mié. 10/296:35 amLJU - ONT
2 stops24h 16mMultiple Airlines
Deal found 10/21$1,143
This Air France deal was found by Cheapflights users on 10/21. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/277:05 amONT - LJU
2 stops19h 35mAir France
mié. 12/1012:25 pmLJU - ONT
2 stops19h 39mAir France
Deal found 10/21$1,153

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 octubre 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$640
(United)

Popular in

June

Cheapest in

November

Average price

$720
Provider with most accurate pricing for Los Angeles-Ljubljana Joze Pucnik flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Ljubljana Joze Pucnik flights.
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From Ontario to Slovenia
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($302 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($65 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 octubre 23, 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

sáb. 1/24

1:53 pm-9:55 pm

2 stops23h 02m

Ljubljana Joze Pucnik

sáb. 1/31

10:25 am-10:53 pm

2 stops21h 28m

$640

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

mié. 11/5

7:00 am-9:55 am

2 stops17h 55m

Ljubljana Joze Pucnik

mar. 11/11

6:35 am-5:34 pm

2 stops19h 59m

$642

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

mié. 11/12

6:00 am-11:40 am

2 stops20h 40m

Ljubljana Joze Pucnik

dom. 11/16

12:25 pm-11:04 pm

2 stops43h 39m

$754

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

lun. 1/5

5:05 am-12:40 pm

2 stops22h 35m

Ljubljana Joze Pucnik

lun. 1/12

9:45 am-5:43 pm

2 stops16h 58m

$894

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

jue. 11/27

7:05 am-11:40 am

2 stops19h 35m

Ljubljana Joze Pucnik

mié. 12/10

12:25 pm-11:04 pm

2 stops19h 39m

$1,153

OntarioLjubljana

ONT - LJU

ONTLJU

Ontario

sáb. 11/1

7:00 am-9:55 am

2 stops18h 55m

$843

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/23

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, November is the cheapest month in which you can book a flight from Ontario to Slovenia (average of $550). Flying from Ontario to Slovenia in June is currently the most expensive (average of $1,319). 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.

  • How long is the flight from Ontario to Slovenia?

    Airlines like KLM fly from Ontario to Slovenia in about 20h 40m. The time it takes to get you to your destination can typically vary by up to . The distance between Ontario and Slovenia is about 6133 mi.

  • 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, November is the cheapest month in which you can book a flight from Ontario to Slovenia (average of $550). Flying from Ontario to Slovenia in June is currently the most expensive (average of $1,319). 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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