$348 Find Cheap Flights from Denver to Slovenia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Slovenia departing on 4/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Book Cheap Denver to Slovenia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Slovenia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Slovenia

Tue, Apr 21 - Mon, Apr 27
British Airways Logo
6:40 pm - 5:15 pm
DEN
-
LJU
14h 35m
1 stop
British Airways Logo
3:10 pm - 4:30 pm
LJU
-
DEN
33h 20m
1 stop
$808British Airways
Tue, Apr 14 - Fri, May 1
Turkish Airlines Logo
8:25 pm - 7:20 pm
DEN
-
LJU
14h 55m
1 stop
Turkish Airlines Logo
1:50 pm - 6:25 pm
LJU
-
DEN
36h 35m
1 stop
$817Turkish Airlines
Thu, Mar 5 - Thu, Mar 12
Turkish Airlines Logo
7:20 pm - 8:25 am
DEN
-
LJU
29h 05m
1 stop
Turkish Airlines Logo
7:35 pm - 6:35 pm
LJU
-
DEN
30h 00m
1 stop
$825Turkish Airlines
Sun, Mar 29 - Mon, Apr 13
Turkish Airlines Logo
8:25 pm - 8:45 am
DEN
-
LJU
28h 20m
1 stop
Turkish Airlines Logo
1:50 pm - 6:25 pm
LJU
-
DEN
36h 35m
1 stop
$826Turkish Airlines
Fri, May 1 - Wed, May 6
Multiple Airlines Logo
4:40 pm - 9:00 am
DEN
-
LJU
32h 20m
3 stops
Multiple Airlines Logo
8:40 pm - 7:00 pm
LJU
-
DEN
30h 20m
3 stops
$829Multiple Airlines
Sat, Apr 18 - Mon, Apr 27
British Airways Logo
6:40 pm - 8:35 pm
DEN
-
LJU
17h 55m
1 stop
British Airways Logo
3:10 pm - 4:30 pm
LJU
-
DEN
33h 20m
1 stop
$858British Airways
Sun, Apr 19 - Tue, Apr 28
Turkish Airlines Logo
8:25 pm - 7:20 pm
DEN
-
LJU
14h 55m
1 stop
Turkish Airlines Logo
9:40 am - 6:25 pm
LJU
-
DEN
16h 45m
1 stop
$861Turkish Airlines
Tue, Apr 14 - Fri, May 1
British Airways Logo
12:24 pm - 5:15 pm
DEN
-
LJU
20h 51m
2 stops
British Airways Logo
9:15 pm - 4:30 pm
LJU
-
DEN
27h 15m
1 stop
$868British Airways
Tue, Apr 14 - Fri, May 1
Multiple Airlines Logo
1:25 pm - 1:55 pm
DEN
-
LJU
16h 30m
2 stops
Multiple Airlines Logo
6:35 am - 3:40 pm
LJU
-
DEN
17h 05m
1 stop
$876Multiple Airlines
Tue, Apr 14 - Fri, May 1
Lufthansa Logo
4:05 pm - 12:35 pm
DEN
-
LJU
12h 30m
1 stop
Lufthansa Logo
2:05 pm - 11:30 pm
LJU
-
DEN
17h 25m
2 stops
$883Lufthansa
Booking Insights

KAYAK's insights & trends for Denver to Slovenia flights

Get data-powered insights and trends into flights from Denver to Slovenia to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Denver to Slovenia?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Denver to Slovenia were found on British Airways ($808) and Turkish Airlines ($817).

Good to know

Low seasonApril
Cheapest flight$348
Best time to beat the crowds with an average 40% drop in price.
Most popular time to fly and prices are also 12% lower on average.
Flight from Denver to Ljubljana

FAQs - booking Slovenia flights

  • How does KAYAK find such low prices on flights from Denver to Slovenia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Slovenia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Slovenia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Denver to Slovenia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to Slovenia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Denver to Slovenia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Slovenia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Denver to Slovenia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Denver to Slovenia

 
Need help choosing which airline to fly with from Denver to Slovenia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.3
Turkish AirlinesOverall score based on 4211 reviews
7.8Crew
7.4Food
7.3Boarding
7.5Entertainment
7.3Comfort
Airline reviews

After arriving in Istanbul, the transit information on the electronic board showed a tight departure time, and the gate changed in the middle, making it difficult to make it on time.

6.0 GoodAnonymous, Feb 2026
ATL - IST
Read more Turkish Airlines reviews

After arriving in Istanbul, the transit information on the electronic board showed a tight departure time, and the gate changed in the middle, making it difficult to make it on time.

Typically good service onboard but baggage delay in airport was significant

My, Syed Zawar Hussein Shirazi frequently flyer membership number was not included on my boarding pass from O’Hare to Istanbul despite my reminder to the attendant at check in. Further she forgot to give me my boarding pass form Istanbul to Lahore and she needs to improve her customer service, please 🙏

Everything about that day was great I was happy with how things went as a first time traveling with the airline thank you for all that you’ve doing by taking us there to our various destinations thanks.

They oversold the tickets by one which was my ticket so I didn’t have a ticket till last second

Not good. I was supposed to be in Mint but got in economy class

Service was slow and checked bag was off last evening when flying business

Turkish Airline canceled our tickets in the very last minute, with our luggage and everything else, all prepared and good to go. It’s clear that they sold the tickets for better money to someone else. Bad, Bad, Bad business!!!

Awful seating. Bad food. Staff only have one bottle of water and no cans.

it was like a banya -so hot... They did provide a great experience with special food. one toilet broke midflight In general it was a peaceful and relaxing flight - for business class it was good.

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Missed it by a couple minutes and couldn’t find an alternative flight so had to spend the night in DC and after much shuffling from 1 airline to another managed to get a United to Frankfurt.

There were only 2 toilets and one of them did not work in business class. We are not allowed to cross classes so had to wait in line to use the toilets!! The entertainment touch display was finicky and did not work all the time.

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

I tried both on line and by calling the Customer Service line to arrange for a special meal as i have food intolerances. I was under the impression from your service representative that I was successful. I was not. I cannot eat spicy foods and get very ill if i eat bell peppers. I could not eat either menu choice and no special meal was actually ordered. ( your representative tried to order it for a flight that did not have meal service!!! - found this out later). Your wonderful cabin crew managed to put together a fruit, salad, roll and cheese tray for me so I had something to eat. WHY WOULD YOU SERVE SPICY FOOD, WITH NO MILDER OPTION,ON AN INTERNATIONAL FLIGHT???

Crew was professional and great, flight was clean. However food was pathetic. I ordered a Hindu meal assuming no meat but they served chicken. Need to be very specific- Hindu meal should be categorize as Vegetarian - no meat or egg. Or it should be specific that we are serving meat.

Late flight Delays Poor service Poor staff Worst airline ever

Ground staff and cabin crew were excellent. Flight was perfectly on time. Zero issues.

Even after a delay, getting off the ground, thanks for keeping me safe, the airline made certain that my connecting flight was rebooked to get me to my final destination. It was actually rebooked twice, and my luggage still managed to meet me. The airline gave me a credit for food and beverage to be used at the airport vendors, regretfully, the credit did not transfer to my final boarding pass. Oh, well…

Everything you need to know for your flight from Denver to Slovenia

Information on your arrival and departure airports