$395 Find Cheap Flights from Denver to Slovenia - Compare and Save

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 10/5. 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

Thu, Sep 10 - Sat, Sep 19
Turkish Airlines Logo
8:30 pm - 8:50 am
DEN
-
LJU
28h 20m
1 stop
Turkish Airlines Logo
9:45 am - 6:25 pm
LJU
-
DEN
16h 40m
1 stop
$938Turkish Airlines
Thu, Sep 10 - Thu, Sep 24
Turkish Airlines Logo
8:30 pm - 8:50 am
DEN
-
LJU
28h 20m
1 stop
Turkish Airlines Logo
9:45 am - 6:25 pm
LJU
-
DEN
16h 40m
1 stop
$938Turkish Airlines
Sat, Aug 22 - Mon, Sep 7
Turkish Airlines Logo
8:30 pm - 1:05 pm
DEN
-
LJU
32h 35m
1 stop
Turkish Airlines Logo
8:25 pm - 6:25 pm
LJU
-
DEN
30h 00m
1 stop
$938Turkish Airlines
Tue, Oct 6 - Tue, Oct 20
Turkish Airlines Logo
8:30 pm - 7:30 pm
DEN
-
LJU
15h 00m
1 stop
Turkish Airlines Logo
9:45 am - 6:25 pm
LJU
-
DEN
16h 40m
1 stop
$938Turkish Airlines
Tue, Oct 6 - Tue, Oct 20
Multiple Airlines Logo
4:05 pm - 12:35 pm
DEN
-
LJU
12h 30m
1 stop
Multiple Airlines Logo
9:55 am - 11:08 pm
LJU
-
DEN
21h 13m
2 stops
$951Multiple Airlines
Tue, Oct 6 - Tue, Oct 20
Lufthansa Logo
4:05 pm - 12:35 pm
DEN
-
LJU
12h 30m
1 stop
Lufthansa Logo
9:35 am - 2:20 pm
LJU
-
DEN
12h 45m
1 stop
$952Lufthansa
Tue, Oct 6 - Tue, Oct 20
Multiple Airlines Logo
11:25 am - 12:35 pm
DEN
-
LJU
17h 10m
2 stops
Multiple Airlines Logo
9:55 am - 11:08 pm
LJU
-
DEN
21h 13m
2 stops
$954Multiple Airlines
Wed, Sep 30 - Thu, Oct 15
Lufthansa Logo
5:40 pm - 9:55 pm
DEN
-
LJU
20h 15m
1 stop
Lufthansa Logo
6:25 am - 3:40 pm
LJU
-
DEN
17h 15m
1 stop
$968Lufthansa
Mon, Sep 21 - Wed, Sep 30
Lufthansa Logo
4:15 pm - 7:25 pm
DEN
-
LJU
19h 10m
1 stop
Lufthansa Logo
1:15 pm - 12:30 am
LJU
-
DEN
19h 15m
2 stops
$969Lufthansa
Mon, Sep 21 - Wed, Sep 30
Multiple Airlines Logo
9:10 am - 2:00 pm
DEN
-
LJU
20h 50m
2 stops
Multiple Airlines Logo
6:25 am - 11:08 pm
LJU
-
DEN
24h 43m
2 stops
$983Multiple Airlines
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.

What is the cheapest month to fly from Denver to Slovenia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Slovenia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to Slovenia is January, when tickets cost $0 (return) on average. On the other hand, the most expensive months are October and June, when the average cost of round-trip tickets is $1,498 and $1,433 respectively.

Good to know

Low season

February

Cheapest flight

$395
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 22% increase in price.
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.
7.4
Turkish AirlinesOverall score based on 4461 reviews
7.5Food
7.5Entertainment
7.3Boarding
7.8Crew
7.3Comfort
Airline reviews

Average at every level . Poor entertainment selection. Boarding was very poor and disorganized. Flight was late by one hour .

6.0 GoodDave, Jul 2026
EWR - IST
Read more Turkish Airlines reviews

Average at every level . Poor entertainment selection. Boarding was very poor and disorganized. Flight was late by one hour .

Spent over $20k on for business class tickets from DFW. They used a very old Boeing 777 with old Business class cabin which was unclean and stained seats. On a route they normally operate the modern Boeing 787. The cabin heat was set to hot for 11 hours. On the IST LHE route the business class experience got even worse. They operate an even older Airbus A330 where trip was falling apart, seat recline did not operate and the whole experience left us hugely disappointed. Next time we likely will shift to better quality product which stands up to their hype. Turkish need to relook at their fleet plans and not use their worst assets of perceived week markets such as Pakistan.

The flight from Houston to Chicago was delayed, causing us to miss our connecting flight to Madrid, losing our Rental Car booking in Bologna taking alternative travel routes to get to our initial destination in Pizza by the 15th. We got the notification of the delay as we were traveling the 3 1/2 hours from Corpus Christi, Texas to Houston Texas for the initial flight. The delays hauling luggage all over Milan‘s Central train station to catch trains to get to Pizza the same day resulting us arriving in Pizza at 2 AM leaving us no time to rest as there was a 9 o’clock checkout time the next morning. The first 72 hours of the trip with nothing but headache, a knee injury from the excessive walking and a delayed car rental replacement, which ended up costing significantly more.

It was crowded… the bathrooms dirty and smelly. The seats have been made even smaller.

Good overall. Seat spacing a bit tight between IST and ISB.

Excellent staff despite some trying passenger situations. Very impressed with their good attitudes and kindness.

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

Ordered Vegan meal - it was ok, but not exceptional. Seat ok row 39 middle section aisle. Nearly full flight - crew was busy but they did the best they could. There was a USB A port at the seat. I listened to my own music and only looked at flight information. One nice thing was the connection information was made available in the screen.

One of the worst check in process at the DIA as well as the boarding counter Changed seat at the last minute and assigned middle seat while I paid for window seat. Requested many times but to no avail . horrible customer service and very poor process Requesting refund for seat that was changed last minute

Pretty standard for long haul international flying. Food was fine, tv/movie selection was great, wifi did not work at all, crew was pleasant enough.

Very, very tight legroom. They must’ve jammed in an additional few rows of seat seating. Denver to Munich was the least legroom I’ve ever had on any flight, let alone a multi hour international journey. I will not take that flight again.

Very good, i got two seats for myself, and was comfortable with the blanket i got

Food is too little (in volume) and too spicy.. There are no snacks in the back of the plane in between meals.

We had a 1 1/2 hour delay before we left Denver. When we arrive to Frankfort, they didn’t announce that people with connecting flights to exit the plane first. My next flight was already boarding when we we taxiing in to the gate. I waited another 10 minutes to get off the plane. I had to run to catch my next flight. I mean run! I made it with one minute to spare, but my luggage did not. My luggage came two hours later on a different flight.

Both flights were delayed and we missed our connection. Our second flight was delayed 3 times. I have always had great service and never any problems with my flights on Lufthansa. My last two flights were, unfortunately, awful. I fly quite often to Germany and have had better luck with United than Lufthansa.

Excellent staff and flight experience. Would rather that I had upgraded to Premium Economy for extra space, but I will know to do it next time.

It was my first experience in business class. It was everything I expected and more. Service was impeccable, food was delicious and I felt rested once I arrived to London

Sorry, I’m not a fan of United. The seats are just too cramped and uncomfortable if you are traveling very far.

Zero legroom or space in economy. Flight was delayed into Munich causing a missed connecting flight and other missed bookings. :(

A major problem at the Frankfurt terminal. You see your connecting flight is on concourse A and you see signs for A, but when you start to walk out to A, only then do you find A is in another terminal which requires a bus ride, passport control and customs. If you sit around in the first terminal too long, you can miss your flight. We made ours.

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

Information on your arrival and departure airports