$597 Find Cheap Flights from Denver to Slovenia - Compare and Save

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Price, demand and travel trends for Denver to Slovenia flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What are the cheapest fares from Denver to Slovenia right now?

The cheapest fare from Denver to Slovenia in the last week was $859 round-trip, to Ljubljana Joze Pucnik (LJU).

Which airport in Slovenia is the cheapest to fly to from Denver?

All flights from Denver to Slovenia arrive at Ljubljana Joze Pucnik (LJU). On average, round-trip fares are around $1,227.

What’s the cheapest day to fly from Denver to Slovenia?

Tuesday tends to be the cheapest day to fly from Denver to Slovenia, while Monday is the most expensive. Fares run about 37% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from Denver to Slovenia?

Data from the past 12 months shows it's cheapest to fly to Slovenia during the evening with average prices of $1,024. The afternoon is the most expensive time to fly, with average prices of $1,291.

Key details for Denver to Slovenia flights

Low season

February

Cheapest flight

$597
Beat the crowds with an average 90% drop in travelers.
The most popular month to fly with an average 88% increase in travelers.
One-way flight from Denver to Ljubljana

Your Denver to Slovenia flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Denver to Slovenia?

    Yes. Fares from Denver to Slovenia are low right now. As a rule of thumb, a round-trip under $952 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from Denver to Slovenia?

    Over the past 12 months, round-trip fares from Denver to Slovenia have ranged from $952 to $1,361.

  • What are the main airports serving Slovenia?

    Flights to Slovenia all arrive at Ljubljana Joze Pucnik (LJU).

  • What airlines fly nonstop from Denver to Slovenia?

    Based on the flight schedule for the next 3 months, no airline regularly operates nonstop flights from Denver to Slovenia. One-stop options include:

    • Turkish Airlines
    • Lufthansa
    • British Airways

  • Which cabin classes are available on flights from Denver to Slovenia?

    On flights from Denver to Slovenia you can book Economy Class or Business Class.

Your guide to booking Denver to Slovenia flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your travel dates are flexible, book your trip for February when flights are typically cheapest and avoid June when prices are at their highest.
  • Flying on Tuesday is usually the cheapest. Flights on Monday cost about 37% more on average, so being flexible with your travel dates could help you save.
  • Start your trip in Ljubljana, which is the most popular destination in Slovenia. From there, it's easy to continue on to other popular destinations such as Bled, Portorož and Kranjska Gora.

Reviews of the top 3 airlines serving 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 4455 reviews
7.3Comfort
7.5Food
7.5Entertainment
7.3Boarding
7.8Crew
Airline reviews

When getting to our seats a blanket, headphones and pillow where there already. The food was very good and plentiful. I liked when they came around w/hot towels to freshen up with. Slippers, socks and an eye mask was a nice surprise. My husband and I have mobility issues and the transporters were absolutely wonderful and helpful w/the wheelchairs at each stop. Getting from one gate to the next they were a blessing.

10.0 ExcellentAnonymous, Oct 2026
Read more Turkish Airlines reviews

When getting to our seats a blanket, headphones and pillow where there already. The food was very good and plentiful. I liked when they came around w/hot towels to freshen up with. Slippers, socks and an eye mask was a nice surprise. My husband and I have mobility issues and the transporters were absolutely wonderful and helpful w/the wheelchairs at each stop. Getting from one gate to the next they were a blessing.

The taxi drivers are very rude. Didn’t wait. They said you come in 5minutes or I leave. Did not leave any messages on front desk and they left. We have to hire new cabs in turkey.

Everything was good except for the seating arrangements. We could not get seats to be seated together with my wife. We’re unfortunately.

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.

Usual wait for over a half hour for a gate at Ohare. They tell you you'll get there early then sit on the plane and wait almost an hour

I enjoyed it, again I believe air Canada has better seating options and better drink options

It was fine for the most part. But the volume on the announcements was way too loud, and the cabin temperature was chilly. We had the hardest landing I've ever experienced- I think it hurt my back, and the tires squealed when we touched down.

Upset about cancel to St. John’s and no overnight accomodation

Not a United thing, but late afternoon departures from Denver with thunderstorms is always prone to delays.

Really delayed, no effort to support customers other than “sometimes we run late.”

The flight was excellent. Their was no service as we boarded, the flight attendants spent about 30 minutes just taking and not really caring that the cabin was about 80 degrees and did not offered any beverage to first class passengers or any passenger. The flight from DEN to ONT is not long but not under an hour, we received one drink and bag of chips if you were lucky. I was in first class…. I did leave my hat on the plane and it only took less than five minutes for a United rep to locate and bring it to me.

Flight was late to take off Plane broke down Had to move everyone to another plane Told we weren’t going to LGA but Newark Also told we would be taken to NY But United lied and we ended up at Newark at 2 in the morning Horrible experience. And the experience of trying to get compensation from United is just as bad. They could not care less about their passengers Never again!

Flight was delayed “due to earlier delays of that plane”, so we were nearly three hours late.

I needed internet for critical matters and it never worked.

The tv and remote didn’t work. The plug to charge our phone didn’t work.

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. :(

More options for your flight from Denver to Slovenia

Complete your trip to Slovenia with a hotel stay or car rental