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Cheap flights from Ontario to Slovenia from $469

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Slovenia departing on 11/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Ontario to Slovenia

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 am - 12:35 pmONT  Ontario-LJU Ljubljana Joze Pucnik
21h 35m2 stops Houston George Bush Intcntl Munich Franz Josef Strauss
United Airlines Logo
6:40 am - 6:01 pmLJU  Ljubljana Joze Pucnik-ONT Ontario
20h 21m2 stops Frankfurt am Main San Francisco
$921United Airlines
Tue, Oct 13 - Tue, Nov 3
United Airlines Logo
11:10 am - 1:05 pmONT  Ontario-LJU Ljubljana Joze Pucnik
16h 55m2 stops San Francisco Frankfurt am Main
United Airlines Logo
6:55 am - 5:41 pmLJU  Ljubljana Joze Pucnik-ONT Ontario
19h 46m2 stops Frankfurt am Main San Francisco
$971United Airlines
Fri, Oct 16 - Tue, Oct 20
Multiple Airlines Logo
10:39 pm - 7:30 pmONT  Ontario-LJU Ljubljana Joze Pucnik
59h 51m2 stops New York John F Kennedy Intl Istanbul
Multiple Airlines Logo
9:45 am - 11:42 pmLJU  Ljubljana Joze Pucnik-ONT Ontario
22h 57m2 stops Istanbul Seattle/Tacoma Intl
$1,125Multiple Airlines
Tue, Sep 15 - Fri, Oct 9
Multiple Airlines Logo
10:39 pm - 8:50 amONT  Ontario-LJU Ljubljana Joze Pucnik
49h 11m2 stops New York John F Kennedy Intl Istanbul
Multiple Airlines Logo
9:45 am - 11:24 pmLJU  Ljubljana Joze Pucnik-ONT Ontario
22h 39m2 stops Istanbul Seattle/Tacoma Intl
$1,151Multiple Airlines
Sun, Sep 13 - Mon, Sep 28
Turkish Airlines Logo
10:39 pm - 7:30 pmONT  Ontario-LJU Ljubljana Joze Pucnik
35h 51m2 stops New York John F Kennedy Intl Istanbul
Turkish Airlines Logo
2:00 pm - 8:57 pmLJU  Ljubljana Joze Pucnik-ONT Ontario
39h 57m2 stops Istanbul New York John F Kennedy Intl
$1,260Turkish Airlines
Mon, Sep 14 - Mon, Sep 28
Turkish Airlines Logo
10:39 pm - 1:05 pmONT  Ontario-LJU Ljubljana Joze Pucnik
53h 26m2 stops New York John F Kennedy Intl Istanbul
Turkish Airlines Logo
8:25 pm - 8:57 pmLJU  Ljubljana Joze Pucnik-ONT Ontario
57h 32m2 stops Istanbul New York John F Kennedy Intl
$1,265Turkish Airlines
Sun, Sep 13 - Mon, Sep 28
United Airlines Logo
5:00 am - 12:35 pmONT  Ontario-LJU Ljubljana Joze Pucnik
22h 35m2 stops Denver Intl Munich Franz Josef Strauss
United Airlines Logo
6:25 am - 8:01 pmLJU  Ljubljana Joze Pucnik-ONT Ontario
22h 36m3 stops Frankfurt am Main Seattle/Tacoma Intl San Francisco
$1,281United Airlines
Fri, Sep 11 - Wed, Sep 16
Turkish Airlines Logo
10:39 pm - 1:05 pmONT  Ontario-LJU Ljubljana Joze Pucnik
53h 26m2 stops New York John F Kennedy Intl Istanbul
Turkish Airlines Logo
8:25 pm - 8:57 pmLJU  Ljubljana Joze Pucnik-ONT Ontario
57h 32m2 stops Istanbul New York John F Kennedy Intl
$1,290Turkish Airlines
Sun, Sep 13 - Mon, Sep 28
United Airlines Logo
5:00 am - 9:35 amONT  Ontario-LJU Ljubljana Joze Pucnik
43h 35m2 stops Denver Intl Frankfurt am Main
United Airlines Logo
6:35 am - 6:11 pmLJU  Ljubljana Joze Pucnik-ONT Ontario
20h 36m2 stops Frankfurt am Main San Francisco
$1,356United Airlines
Fri, Sep 11 - Fri, Sep 18
United Airlines Logo
5:00 am - 12:35 pmONT  Ontario-LJU Ljubljana Joze Pucnik
22h 35m2 stops Denver Intl Munich Franz Josef Strauss
United Airlines Logo
5:50 am - 6:11 pmLJU  Ljubljana Joze Pucnik-ONT Ontario
21h 21m2 stops Frankfurt am Main San Francisco
$1,424United Airlines
Wed, Sep 9 - Sat, Sep 19

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United Airlines flights from Ontario to Slovenia

Our best United Airlines deals on Ontario to Slovenia flight tickets
United Airlines
Oct 13
ONT6:00 amOntario
21h 35m
2 stops
LJU12:35 pmLjubljana Joze Pucnik
Nov 3
LJU6:40 amLjubljana Joze Pucnik
20h 21m
2 stops
ONT6:01 pmOntario
$921
United Airlines
Oct 16
ONT11:10 amOntario
16h 55m
2 stops
LJU1:05 pmLjubljana Joze Pucnik
Oct 20
LJU6:55 amLjubljana Joze Pucnik
19h 46m
2 stops
ONT5:41 pmOntario
$971
United Airlines
Sep 11
ONT5:00 amOntario
22h 35m
2 stops
LJU12:35 pmLjubljana Joze Pucnik
Sep 16
LJU6:25 amLjubljana Joze Pucnik
22h 36m
3 stops
ONT8:01 pmOntario
$1,281

Air Serbia flights from Ontario to Slovenia

Our best Air Serbia deals on Ontario to Slovenia flight tickets
Air Serbia
Aug 30
ONT11:59 pmOntario
35h 06m
2 stops
LJU8:05 pmLjubljana Joze Pucnik
Sep 8
LJU8:40 pmLjubljana Joze Pucnik
33h 17m
2 stops
ONT8:57 pmOntario
$1,756
Air Serbia
Aug 30
ONT11:59 pmOntario
23h 51m
2 stops
LJU8:50 amLjubljana Joze Pucnik
Sep 6
LJU2:50 pmLjubljana Joze Pucnik
41h 04m
2 stops
ONT10:54 pmOntario
$2,032

momondo 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, momondo users made 832,500 searches. Data last updated August 17, 2026.
Use the filters below to find and compare flights from Ontario to Slovenia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLjubljana

ONT Ontario - LJU Ljubljana Joze Pucnik

ONTLJU

Ontario

Tue 10/13

6:00 am-12:35 pm

2 stops21h 35m

Ljubljana Joze Pucnik

Tue 11/3

6:40 am-6:01 pm

2 stops20h 21m

$921
Quickest round-trip

OntarioLjubljana

ONT Ontario - LJU Ljubljana Joze Pucnik

ONTLJU

Ontario

Fri 10/16

11:10 am-1:05 pm

2 stops16h 55m

Ljubljana Joze Pucnik

Tue 10/20

6:55 am-5:41 pm

2 stops19h 46m

$971

OntarioLjubljana

ONT Ontario - LJU Ljubljana Joze Pucnik

ONTLJU

Ontario

Tue 9/15

10:39 pm-7:30 pm

2 stops59h 51m

Ljubljana Joze Pucnik

Fri 10/9

9:45 am-11:42 pm

2 stops22h 57m

$1,125

OntarioLjubljana

ONT Ontario - LJU Ljubljana Joze Pucnik

ONTLJU

Ontario

Sun 9/13

10:39 pm-8:50 am

2 stops49h 11m

Ljubljana Joze Pucnik

Mon 9/28

9:45 am-11:24 pm

2 stops22h 39m

$1,151

OntarioLjubljana

ONT Ontario - LJU Ljubljana Joze Pucnik

ONTLJU

Ontario

Mon 9/14

10:39 pm-7:30 pm

2 stops35h 51m

Ljubljana Joze Pucnik

Mon 9/28

2:00 pm-8:57 pm

2 stops39h 57m

$1,260

OntarioLjubljana

ONT Ontario - LJU Ljubljana Joze Pucnik

ONTLJU

Ontario

Sun 9/13

10:39 pm-1:05 pm

2 stops53h 26m

Ljubljana Joze Pucnik

Mon 9/28

8:25 pm-8:57 pm

2 stops57h 32m

$1,265

OntarioLjubljana

ONT Ontario - LJU Ljubljana Joze Pucnik

ONTLJU

Ontario

Fri 9/11

5:00 am-12:35 pm

2 stops22h 35m

Ljubljana Joze Pucnik

Wed 9/16

6:25 am-8:01 pm

3 stops22h 36m

$1,281

OntarioLjubljana

ONT Ontario - LJU Ljubljana Joze Pucnik

ONTLJU

Ontario

Sun 9/13

10:39 pm-1:05 pm

2 stops53h 26m

Ljubljana Joze Pucnik

Mon 9/28

8:25 pm-8:57 pm

2 stops57h 32m

$1,290

OntarioLjubljana

ONT Ontario - LJU Ljubljana Joze Pucnik

ONTLJU

Ontario

Fri 9/11

5:00 am-9:35 am

2 stops43h 35m

Ljubljana Joze Pucnik

Fri 9/18

6:35 am-6:11 pm

2 stops20h 36m

$1,356

OntarioLjubljana

ONT Ontario - LJU Ljubljana Joze Pucnik

ONTLJU

Ontario

Wed 9/9

5:00 am-12:35 pm

2 stops22h 35m

Ljubljana Joze Pucnik

Sat 9/19

5:50 am-6:11 pm

2 stops21h 21m

$1,424

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to Slovenia from

How to get the cheapest flight ticket from Ontario to Slovenia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Ontario to Slovenia?

Delta and United Airlines are the most popular carriers operating from Ontario to Slovenia

What airlines fly to Slovenia?

Lufthansa, Turkish Airlines and Delta are the top three most popular airlines that fly to Slovenia from Ontario according to our data. Lufthansa is the first choice among our users, with 26% of people opting to fly with this airline when traveling to Slovenia. Keep in mind that there are 5 different airlines that fly to Slovenia on a routine basis, so you have a few additional options to choose from.

Cheap Ontario to Slovenia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Slovenia

Fastest flight time

21h 00m

Direct flights

None
The fastest flight from Ontario to Slovenia takes 21h 00m
There are no direct flights from Ontario to Slovenia. There are no popular flight routes from Ontario to Slovenia.
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Frequently asked questions about flying from Ontario to Slovenia

  • When did momondo last update prices for flights from Ontario Airport to Slovenia?

    Prices for flights from Ontario Airport to Slovenia are updated daily.

  • How old do you have to be to fly from Ontario Airport to Slovenia?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Slovenia.

  • What documentation or ID do you need to fly to Slovenia?

    The necessary travel and health documents for your Slovenia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Slovenia?

Finding the right flight to Slovenia from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Slovenia quick and easy, saving you time and money.

Can I find flights from Ontario to Slovenia with flexible booking policies on momondo?

All flight searches from Ontario to Slovenia on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Slovenia?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Slovenia.

I’m not ready to book a flight from Ontario to Slovenia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Slovenia from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Wed 9/16
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