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$521+ Cheap flights from Colorado to Slovenia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LJU
Dec 1 — Dec 81
Mon 12/1
Mon 12/8
1 adult, Economy
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Find flight deals from Colorado to Slovenia

Cheapest flights from Colorado to Slovenia
Explore the most affordable flight options available from Colorado to Slovenia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 1, 2025.

This oojo deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:20 pmDEN - LJU
1 stop29h 05mTurkish Airlines
Sun 12/219:20 amLJU - DEN
2 stops20h 46mTurkish Airlines
Deal found 10/31$947
This FlightHub deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/131:25 pmDEN - LJU
2 stops16h 15mMultiple Airlines
Sun 12/216:35 amLJU - DEN
2 stops17h 54mMultiple Airlines
Deal found 10/31$1,066
This Ovago deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/133:55 pmDEN - LJU
1 stop22h 00mLufthansa
Sun 12/216:35 amLJU - DEN
1 stop17h 25mLufthansa
Deal found 10/30$1,194

Cheap flight deals from Colorado to Slovenia

Keep the following information in mind while searching for Colorado to Slovenia flight deals. Data was last updated November 1, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$598
(FlightHub)

One-way from

$521
(Mytrip)

Popular in

December

Cheapest in

April

Average price

$671
Provider with most accurate pricing for Denver Intl-Ljubljana Joze Pucnik flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Ljubljana Joze Pucnik flights.
Search Deals
From Colorado to Slovenia
Search Deals
One-way flight from Colorado to Slovenia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($221 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($89 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado to Slovenia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 1, 2025.
Use the filters below to find and compare flights from Colorado to Slovenia that are best for you.

Fly from

Colorado

Fly to

Slovenia

Route

Depart

Return

Price

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Thu 4/2

6:40 pm-8:20 pm

1 stop17h 40m

Ljubljana Joze Pucnik

Mon 4/6

3:10 pm-4:35 pm

1 stop33h 25m

$759

Colorado SpringsLjubljana

COS - LJU

COSLJU

Colorado Springs

Wed 4/1

1:50 pm-12:35 pm

2 stops14h 45m

Ljubljana Joze Pucnik

Sun 4/5

6:25 am-6:30 pm

2 stops20h 05m

$770

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Tue 4/14

4:05 pm-7:15 pm

1 stop19h 10m

Ljubljana Joze Pucnik

Tue 4/21

10:15 am-7:01 pm

2 stops16h 46m

$860

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Sat 12/13

7:20 pm-8:25 am

1 stop29h 05m

Ljubljana Joze Pucnik

Sun 12/21

9:20 am-10:06 pm

2 stops20h 46m

$947

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Sun 3/15

7:45 am-8:25 am

2 stops41h 40m

Ljubljana Joze Pucnik

Fri 3/20

9:20 am-6:35 pm

1 stop16h 15m

$1,057

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Tue 4/14

11:05 am-7:15 pm

3 stops24h 10m

$521

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Tue 4/14

8:25 pm-7:30 pm

1 stop15h 05m

$540

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Tue 12/23

7:20 pm-8:25 am

1 stop29h 05m

$563

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Tue 12/23

7:15 pm-7:30 pm

2 stops40h 15m

$607

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Mon 12/22

12:14 am-1:35 pm

3 stops53h 21m

$645

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Best time to book a flight from Colorado to Slovenia

Have a flexible travel schedule? Discover the best time to fly to Slovenia from Colorado with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Colorado to Slovenia

What is the cheapest time of day to fly from CO to SI?

Find hourly flight availability from Colorado to Slovenia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 1, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 52% on flights from Colorado to Slovenia by exploring options for tickets in the evening.

Related info for your journey

Find useful and relevant information for your journey from Colorado to Slovenia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Colorado to Slovenia?

    There are many flights that can get you from Colorado to Slovenia in 14h 45m. Fly via British Airways or Lufthansa to get the fastest option. The distance between Colorado and Slovenia is about 5459 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Colorado to Slovenia that include hotel bookings?

    Yes. In addition to deals on Colorado to Slovenia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado to Slovenia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Slovenia.

  • Can I find deals for business class flights from Colorado to Slovenia?

    Yes. Cheapflights offers flight deals from Colorado to Slovenia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Colorado to Slovenia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Colorado to Slovenia

Discover the top 2 airlines that operate flights from Colorado to Slovenia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$598Average$709FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$903Average$1,312FlexibilityNo cancel feeOn-time76%

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