$374 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 9/29. 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

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals
Booking Insights
Flight Deals

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
8:25 pm - 8:45 am
DEN
-
LJU
28h 20m
1 stop
Turkish Airlines Logo
9:40 am - 6:25 pm
LJU
-
DEN
16h 45m
1 stop
$895Turkish Airlines
Thu, Oct 1 - Thu, Oct 15
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
$896Turkish Airlines
Mon, Aug 10 - Sun, Aug 23
British Airways Logo
6:40 pm - 4:20 pm
DEN
-
LJU
13h 40m
1 stop
British Airways Logo
9:25 pm - 4:30 pm
LJU
-
DEN
27h 05m
1 stop
$901British Airways
Thu, Oct 1 - Thu, Oct 15
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
$904Turkish Airlines
Mon, Aug 10 - Sun, Aug 23
British Airways Logo
6:40 pm - 4:20 pm
DEN
-
LJU
13h 40m
1 stop
British Airways Logo
9:25 pm - 7:38 pm
LJU
-
DEN
30h 13m
2 stops
$915British Airways
Wed, Nov 4 - Wed, Nov 11
Turkish Airlines Logo
8:30 pm - 6:45 pm
DEN
-
LJU
14h 15m
1 stop
Turkish Airlines Logo
9:10 am - 5:25 pm
LJU
-
DEN
16h 15m
1 stop
$917Turkish Airlines
Thu, Sep 10 - Sat, Sep 19
Turkish Airlines Logo
6:00 am - 8:45 am
DEN
-
LJU
18h 45m
2 stops
Turkish Airlines Logo
8:15 pm - 6:25 pm
LJU
-
DEN
30h 10m
1 stop
$933Turkish Airlines
Thu, Oct 1 - Sat, Oct 17
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
$935Turkish Airlines
Sat, Aug 22 - Mon, Sep 7
Turkish Airlines Logo
8:25 pm - 7:20 pm
DEN
-
LJU
14h 55m
1 stop
Turkish Airlines Logo
8:15 pm - 6:25 pm
LJU
-
DEN
30h 10m
1 stop
$938Turkish Airlines
Mon, Aug 10 - Sun, Aug 23
British Airways Logo
5:03 am - 4:20 pm
DEN
-
LJU
27h 17m
2 stops
British Airways Logo
9:25 pm - 7:38 pm
LJU
-
DEN
30h 13m
2 stops
$947British Airways
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 June and October, when the average cost of round-trip tickets is $1,382 and $893 respectively.

Good to know

Low seasonFebruary
Cheapest flight$374
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 4439 reviews
7.5Entertainment
7.8Crew
7.5Food
7.3Boarding
7.3Comfort
Airline reviews

To get to jet blue at JFK from any connecting flight you have to go through security again.

6.0 GoodAnonymous, Jun 2026
JFK - PIT
Read more Turkish Airlines reviews

To get to jet blue at JFK from any connecting flight you have to go through security again.

Amazing! One of the best kept secrets in air travel!

We fly Bussines class and we didn’t feel like it is. Out luggage didn’t arrive and we have to return again next day from our hotel to airport to get them. Still waiting. No information from Turkish airlines Very poor customer service I think booking through kayak it was wrong decision

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