HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Slovenia

$643+ Cheap flights from Denver (DEN) 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 3/28. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LJU
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Slovenia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$643
(Ovago)

Popular in

December

Cheapest in

April

Average price

$1,090
Provider with most accurate pricing for Denver Intl-Ljubljana Joze Pucnik flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Ljubljana Joze Pucnik flights.
Search Deals
From Denver Intl to Slovenia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($221 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($89 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 22, 2025.

This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/226:00 amDEN - LJU
2 stops29h 15mTurkish Airlines
Fri 11/147:35 pmLJU - DEN
1 stop30h 00mTurkish Airlines
Deal found 10/21$917
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/34:20 pmDEN - LJU
1 stop19h 10mLufthansa
Sun 12/1410:35 amLJU - DEN
1 stop13h 25mLufthansa
Deal found 10/22$961
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1311:15 amDEN - LJU
2 stops17h 40mMultiple Airlines
Sun 12/219:45 amLJU - DEN
2 stops22h 30mMultiple Airlines
Deal found 10/21$1,044
This Turkish Airlines deal was found by Cheapflights users on 10/20. 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.
Wed 10/226:00 amDEN - LJU
2 stops42h 30mMultiple Airlines
Fri 11/147:35 pmLJU - DEN
2 stops27h 15mMultiple Airlines
Deal found 10/20$1,085
This Ovago deal was found by Cheapflights users on 10/20. 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.
Sat 12/135:45 pmDEN - LJU
1 stop20h 10mLufthansa
Sun 12/219:45 amLJU - DEN
2 stops22h 30mLufthansa
Deal found 10/20$1,090
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:20 pmDEN - LJU
1 stop29h 05mTurkish Airlines
Sun 12/219:20 amLJU - DEN
2 stops44h 46mTurkish Airlines
Deal found 10/22$1,122

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 October 22, 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

Sat 3/28

8:25 pm-1:00 pm

1 stop32h 35m

Ljubljana Joze Pucnik

Sat 4/4

9:40 am-6:20 pm

1 stop16h 40m

$643

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Sat 3/14

8:20 pm-6:40 pm

1 stop15h 20m

Ljubljana Joze Pucnik

Sat 3/21

9:20 am-6:35 pm

1 stop16h 15m

$661

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Fri 3/27

8:20 pm-7:45 am

1 stop28h 25m

Ljubljana Joze Pucnik

Sun 4/5

9:40 am-6:20 pm

1 stop16h 40m

$671

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Fri 3/27

8:20 pm-7:45 am

1 stop28h 25m

Ljubljana Joze Pucnik

Thu 4/2

9:40 am-6:20 pm

1 stop16h 40m

$671

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Thu 4/2

6:40 pm-8:20 pm

1 stop17h 40m

Ljubljana Joze Pucnik

Mon 4/6

3:10 pm-4:35 pm

1 stop33h 25m

$760

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Sat 3/28

6:40 pm-7:40 pm

1 stop18h 00m

Ljubljana Joze Pucnik

Sun 4/5

9:25 pm-4:35 pm

1 stop27h 10m

$780

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Fri 3/27

7:45 am-6:40 pm

2 stops27h 55m

Ljubljana Joze Pucnik

Wed 4/1

1:55 pm-6:20 pm

1 stop36h 25m

$880

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Mon 3/30

5:01 pm-5:15 pm

2 stops40h 14m

Ljubljana Joze Pucnik

Sun 4/5

9:25 pm-4:35 pm

1 stop27h 10m

$947

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Wed 12/3

4:20 pm-7:30 pm

1 stop19h 10m

Ljubljana Joze Pucnik

Sun 12/14

10:35 am-4:00 pm

1 stop13h 25m

$961

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

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 October 22, 2025.

One of the essential ways to save on airfare from Denver to Slovenia is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 68% on airfare.

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 October 22, 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.
Turkish Airlines
7.3
Good
4,022 reviews

Entertainment

7.4

Food

7.4

Boarding

7.3

Comfort

7.3

Overall

7.3

Crew

7.7

Reviews

1 / 20
6.0
Good

Christina,Sep 2025

DTW - IST

Crew was fine but the plane seemed smaller like the seats were very crammed in for an international flight. I’m a small person and it felt suffocating to me.
Turkish Airlines
7.3
Good
4,022 reviews
Turkish Airlines
7.3
Good
4,022 reviews

Entertainment

7.4

Food

7.4

Boarding

7.3

Comfort

7.3

Overall

7.3

Crew

7.7

Reviews

1 / 20
6.0
Good

Christina,Sep 2025

DTW - IST

Crew was fine but the plane seemed smaller like the seats were very crammed in for an international flight. I’m a small person and it felt suffocating to me.
Lufthansa
6.8
Okay
7,507 reviews
Turkish Airlines
7.3
Good
4,022 reviews

Entertainment

7.4

Food

7.4

Boarding

7.3

Comfort

7.3

Overall

7.3

Crew

7.7

Reviews

1 / 20
6.0
Good

Christina,Sep 2025

DTW - IST

Crew was fine but the plane seemed smaller like the seats were very crammed in for an international flight. I’m a small person and it felt suffocating to me.

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.

  • How long is the flight from Denver to Slovenia?

    There are many flights that can get you from Denver to Slovenia in 17h 40m. Fly via Turkish Airlines or British Airways to get the fastest option. The distance between Denver and Slovenia is about 5400 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Denver to Slovenia

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Heathrow flights
Denver to Frankfurt flights
Denver to Gatwick flights
Denver to Munich flights
Denver to Leonardo da Vinci/Fiumicino flights
Denver to Charles de Gaulle flights
Denver to Dublin flights
Denver to Barcelona-El Prat flights
Denver to London City flights
Denver to Orly flights
Denver to Athens flights
Denver to Istanbul flights
Denver to Madrid flights
Denver to Amsterdam flights
Denver to Lisbon flights
Denver to Luton flights
Denver to Zurich flights
Denver to Malpensa flights
Denver to Stansted flights
Denver to Linate flights
Denver to Sabiha Gokcen flights
Denver to Keflavik Intl flights
Denver to Edinburgh flights
Denver to Oslo Gardermoen flights
Denver to Vicenza flights
Denver to Bruxelles-National flights
Denver to Prague flights
Denver to Florence flights
Denver to Berlin flights
Denver to Frederic Chopin flights
Denver to Geneva flights
Denver to Glasgow Intl flights
Denver to Budapest flights
Denver to Copenhagen flights
Denver to Arlanda flights
Denver to Málaga flights
Denver to Vienna flights
Denver to Bologna flights
Denver to Helsinki flights
Denver to Porto flights
Denver to Basel flights
Denver to Palma de Mallorca flights
Denver to Manchester flights
Denver to Sheremetyevo flights
Denver to Shannon flights
Denver to Domodedovo flights
Denver to Naples flights
Denver to Beauvais-Tille flights
Montrose to Heathrow flights

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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$598Average$709FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$903Average$1,359FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.