Slovenia

$383+ Cheap flights from Denver (DEN) 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LJU
août 19 — août 261
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Cheap flight deals from Denver to Slovenia

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

Round-trip from

$748
(oojo)

One-way from

$383
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,048
From Denver Intl to Slovenia
One-way flight from Denver Intl to Slovenia
Highest demand for flights based on searches. 39% potential increase in price ($826 potential increase over avg. RT price).
Cheapest flight prices on average. 21% potential price decrease ($223 potential savings vs. average RT price).
Average for round-trip flights in August 2025

Find flight deals from Denver to Slovenia

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

This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/117:20 pmDEN - LJU
1 stop29h 05mTurkish Airlines
sam. 11/229:20 amLJU - DEN
1 stop16h 15mTurkish Airlines
Deal found 8/13$748
This Turkish Airlines 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 10/117:50 pmDEN - LJU
1 stop15h 25mTurkish Airlines
sam. 10/189:25 amLJU - DEN
1 stop16h 30mTurkish Airlines
Deal found 8/14$781
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/26:35 pmDEN - LJU
1 stop14h 40mBritish Airways
mer. 9/176:00 pmLJU - DEN
1 stop30h 25mBritish Airways
Deal found 8/12$798
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 9/36:35 pmDEN - LJU
1 stop15h 15mBritish Airways
mer. 9/176:00 pmLJU - DEN
1 stop30h 25mBritish Airways
Deal found 8/12$836
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/26:35 pmDEN - LJU
1 stop14h 40mBritish Airways
lun. 9/153:10 pmLJU - DEN
1 stop33h 15mBritish Airways
Deal found 8/12$848
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 9/36:35 pmDEN - LJU
1 stop15h 15mBritish Airways
lun. 9/153:10 pmLJU - DEN
1 stop33h 15mBritish Airways
Deal found 8/12$886
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 9/277:50 pmDEN - LJU
1 stop33h 20mTurkish Airlines
sam. 10/48:10 pmLJU - DEN
1 stop29h 45mTurkish Airlines
Deal found 8/13$897
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/1111:15 amDEN - LJU
2 stops14h 05mLufthansa
sam. 11/2210:35 amLJU - DEN
1 stop13h 25mLufthansa
Deal found 8/13$933
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/1111:15 amDEN - LJU
2 stops42h 20mMultiple Airlines
sam. 11/226:45 amLJU - DEN
2 stops37h 52mMultiple Airlines
Deal found 8/13$947

Cheapflights Fare Finder

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

Fly from

Denver

Fly to

Slovenia

Route

Depart

Return

Price

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

mar. 11/11

7:20 pm-8:25 am

1 stop29h 05m

Ljubljana Joze Pucnik

sam. 11/22

9:20 am-5:35 pm

1 stop16h 15m

$748

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

sam. 10/11

7:50 pm-7:15 pm

1 stop15h 25m

Ljubljana Joze Pucnik

sam. 10/18

9:25 am-5:55 pm

1 stop16h 30m

$781

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

mar. 9/2

6:35 pm-5:15 pm

1 stop14h 40m

Ljubljana Joze Pucnik

mer. 9/17

6:00 pm-4:25 pm

1 stop30h 25m

$798

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

mer. 9/3

6:35 pm-5:50 pm

1 stop15h 15m

Ljubljana Joze Pucnik

mer. 9/17

6:00 pm-4:25 pm

1 stop30h 25m

$836

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

mar. 9/2

6:35 pm-5:15 pm

1 stop14h 40m

Ljubljana Joze Pucnik

lun. 9/15

3:10 pm-4:25 pm

1 stop33h 15m

$848

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

mer. 9/3

6:35 pm-5:50 pm

1 stop15h 15m

Ljubljana Joze Pucnik

lun. 9/15

3:10 pm-4:25 pm

1 stop33h 15m

$886

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

sam. 9/27

7:50 pm-1:10 pm

1 stop33h 20m

Ljubljana Joze Pucnik

sam. 10/4

8:10 pm-5:55 pm

1 stop29h 45m

$897

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

mar. 11/11

11:15 am-9:20 am

2 stops14h 05m

Ljubljana Joze Pucnik

sam. 11/22

10:35 am-4:00 pm

1 stop13h 25m

$933

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

lun. 9/15

10:55 pm-9:00 am

3 stops50h 05m

$383

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

lun. 9/15

6:35 pm-4:10 pm

1 stop13h 35m

$623

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 12 results
1
2

Best time to book a flight from Denver to Slovenia

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

What is the cheapest time of day to fly from DEN to SI?

Find hourly flight availability from Denver to Slovenia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated août 14, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to Slovenia as you normally would.

Reviews of airlines servicing Slovenia

Get insights into the airlines that provide service to Slovenia. 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 Slovenia. Reviews last updated août 14, 2025.
Peruse reviews from past customers who have flown with Turkish Airlines and Lufthansa from Denver to Slovenia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Overall

7.3

Entertainment

7.4

Comfort

7.3

Boarding

7.3

Crew

7.7

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Brian,Jul 2025

SEA - IST

Horrible check-in experience in Seattle. Was actually yelled at by a customer service rep and then he intentionally would put us in the back row to make sure our seats would not recline. When I complained to customer service they told me they did not find any issues with how we were treated. The sinks did not drain in the bathroom during the flight and my in-flight entertainment never worked during a 12 hour flight. They said they would reset 3 times but never did. Would never fly them again.

Overall

7.3

Entertainment

7.4

Comfort

7.3

Boarding

7.3

Crew

7.7

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Brian,Jul 2025

SEA - IST

Horrible check-in experience in Seattle. Was actually yelled at by a customer service rep and then he intentionally would put us in the back row to make sure our seats would not recline. When I complained to customer service they told me they did not find any issues with how we were treated. The sinks did not drain in the bathroom during the flight and my in-flight entertainment never worked during a 12 hour flight. They said they would reset 3 times but never did. Would never fly them again.

Overall

7.3

Entertainment

7.4

Comfort

7.3

Boarding

7.3

Crew

7.7

Food

7.4

Reviews

1 / 20
2.0
Mediocre

Brian,Jul 2025

SEA - IST

Horrible check-in experience in Seattle. Was actually yelled at by a customer service rep and then he intentionally would put us in the back row to make sure our seats would not recline. When I complained to customer service they told me they did not find any issues with how we were treated. The sinks did not drain in the bathroom during the flight and my in-flight entertainment never worked during a 12 hour flight. They said they would reset 3 times but never did. Would never fly them again.

Related info for your journey

Find useful and relevant information for your journey from Denver 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 Denver to Slovenia?

    Most people fly from Denver Intl (DEN) if they book a flight from Denver to Slovenia. Denver Intl is conveniently located just 18.5 mi from Denver’s city center.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Denver to Slovenia (average of $710). Flying from Denver 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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Top 2 airlines flying from Denver to Slovenia

Discover the top 2 airlines that operate flights from Denver to Slovenia. 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 août 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$598Average$706FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$766Average$1,324FlexibilityNo cancel feeOn-time76%

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