$713 Find Cheap Flights from Denver to Slovenia

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Slovenia departing on 4/14. 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 14 - Fri, May 1
Turkish Airlines Logo
8:25 pm - 8:45 am
DEN
-
LJU
28h 20m
1 stop
Turkish Airlines Logo
8:15 pm - 6:25 pm
LJU
-
DEN
30h 10m
1 stop
$713Turkish Airlines
Tue, Apr 14 - Fri, May 1
British Airways Logo
7:26 am - 5:15 pm
DEN
-
LJU
25h 49m
2 stops
British Airways Logo
9:15 pm - 4:30 pm
LJU
-
DEN
27h 15m
1 stop
$755British Airways
Tue, Apr 14 - Fri, May 1
British Airways Logo
8:40 am - 5:15 pm
DEN
-
LJU
24h 35m
2 stops
British Airways Logo
9:15 pm - 11:59 pm
LJU
-
DEN
34h 44m
2 stops
$758British Airways
Sat, Mar 14 - Fri, Mar 20
Turkish Airlines Logo
8:20 pm - 8:25 am
DEN
-
LJU
29h 05m
1 stop
Turkish Airlines Logo
9:20 am - 6:35 pm
LJU
-
DEN
16h 15m
1 stop
$818Turkish Airlines
Sat, May 2 - Sun, May 17
Turkish Airlines Logo
8:25 pm - 12:55 pm
DEN
-
LJU
32h 30m
1 stop
Turkish Airlines Logo
9:40 am - 6:25 pm
LJU
-
DEN
16h 45m
1 stop
$821Turkish Airlines
Mon, Mar 16 - Mon, Mar 23
Lufthansa Logo
5:20 pm - 12:40 pm
DEN
-
LJU
12h 20m
1 stop
Lufthansa Logo
8:10 pm - 3:35 pm
LJU
-
DEN
26h 25m
1 stop
$898Lufthansa
Mon, Mar 16 - Mon, Mar 23
SWISS Logo
1:25 pm - 10:25 pm
DEN
-
LJU
26h 00m
2 stops
SWISS Logo
3:10 pm - 9:55 pm
LJU
-
DEN
37h 45m
2 stops
$899SWISS
Tue, Mar 17 - Mon, Mar 23
Lufthansa Logo
6:45 pm - 10:10 pm
DEN
-
LJU
20h 25m
1 stop
Lufthansa Logo
8:10 pm - 3:35 pm
LJU
-
DEN
26h 25m
1 stop
$910Lufthansa
Mon, Mar 16 - Mon, Mar 23
Lufthansa Logo
11:15 am - 9:55 am
DEN
-
LJU
15h 40m
2 stops
Lufthansa Logo
8:10 pm - 3:35 pm
LJU
-
DEN
26h 25m
1 stop
$914Lufthansa
Tue, Mar 17 - Mon, Mar 23
Delta Logo
6:10 am - 12:20 pm
DEN
-
LJU
23h 10m
2 stops
Delta Logo
12:25 pm - 11:23 pm
LJU
-
DEN
41h 58m
2 stops
$919Delta
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 Turkish Airlines ($713) and British Airways ($755).

Good to know

Low seasonApril
Cheapest flight$713
Best time to beat the crowds with an average 39% drop in price.
Most popular time to fly and prices are also 10% 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 4200 reviews
7.3Boarding
7.4Entertainment
7.4Food
7.8Crew
7.3Comfort
Airline reviews

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.

8.0 ExcellentEvans, Jan 2026
EWR - IST
Read more Turkish Airlines reviews

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.

Chicago to Istanbul was a much better experience than I expected since I’m more accustomed to Qatar Airways business class. The business lounge in the Istanbul airport was amazing - loved the lockers and phone charging stations, and the bathroom was a spa experience in itself. The onward leg from Istanbul to Karachi was utterly disappointing. Terrible plane, and I felt like I was in economy - the seats don’t come near to lying flat and the food was mediocre. What a sad downgrade - it isn’t as though the ticket on that leg was cheaper. So, on that front, there’s no contest with Qatar airways.

Second leg of Turkish Airline with Indigo is disaster for following reason. 1) You have to carry your cabin bags through ladder to boeing 777 because it was parked somewhere in parking lot and was not given a gate to board passengers and this seems to be people traveling to and fro from those flights and is not issue with flight itself. 2) I choose non vegetarian food on Turkish portal way ahead of checkin to entire trip, However the Indigo flight gave me random veg food saying they code veg food code from Turkish. 3) Indigo did not served any alcoholic beverages stating some weird reason which is non nonsensical. 4)Indigo have TV screens in front of you but it displays nothing except "Welcome Onboard" with annoying white black ground in dark flight. This is the most stupidest and annoying part because you are held hostage for 7 hours and only thing you could do is stare back at white screen which does not have entertainment package or even flight tracker. Such a shame.

nice and clean plane but the seats and the comfort was not what i expected. i expected more based on all the ads and reviews that i've read. I guess you get what you pay for in economy.

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…

Trip was smooth, good drew, average meal, almost cold coffee. Excellent landing. Did not enjoy going down the stairs, walking to the gate, walking up the stairs, going a long walk to the exchange gate, and going down the stairs again to be bussed all the way where we originally landed to take our next flight! Over all an average experience. Thank you.

I booked extra leg room, due to seat neighbor i now consider extra shoulder and arm room as well. Seems like the seats shrink in width now The crew was very friendly and professional ( 100%). Food was good not great, breakfast was bad, a dry slice of bread would have been better. Facilities clean.

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

Information on your arrival and departure airports