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Slovenia

$702+ Cheap flights from Colorado to Slovenia

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LJU
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
1 adult, Economy
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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 April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$702
(oojo)

Popular in

December

Cheapest in

April

Average price

$646
Provider with most accurate pricing for Denver Intl-Ljubljana Joze Pucnik flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Ljubljana Joze Pucnik flights.
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From Colorado to Slovenia
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Highest demand for flights based on searches. 39% potential increase in price ($818 potential increase over avg. RT price).
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Cheapest flight prices on average. 21% potential price decrease ($222 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 2, 2025.

This oojo deal was found by Cheapflights users on 4/2. 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 9/137:50 pmDEN - LJU
1 stop28h 40mTurkish Airlines
Sat 9/278:10 pmLJU - DEN
1 stop29h 45mTurkish Airlines
Deal found 4/2$702
This Gotogate deal was found by Cheapflights users on 4/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:02 pmDEN - LJU
2 stops37h 13mBritish Airways
Sat 10/1811:00 amLJU - DEN
2 stops36h 45mBritish Airways
Deal found 4/1$903
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/196:35 pmDEN - LJU
1 stop18h 05mMultiple Airlines
Sat 5/177:55 pmLJU - DEN
2 stops46h 02mMultiple Airlines
Deal found 4/2$959
This Gurufare deal was found by Cheapflights users on 4/1. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/162:00 pmCOS - LJU
2 stops14h 35mLufthansa
Fri 5/238:00 pmLJU - COS
2 stops29h 52mLufthansa
Deal found 4/1$1,218
This Gurufare deal was found by Cheapflights users on 4/1. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/224:15 pmDEN - LJU
1 stop19h 10mLufthansa
Tue 9/3010:10 amLJU - DEN
1 stop13h 25mLufthansa
Deal found 4/1$1,220
This Finnair deal was found by Cheapflights users on 4/2. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2412:13 pmDEN - LJU
2 stops36h 32mFinnair
Sat 5/179:30 amLJU - DEN
2 stops20h 08mFinnair
Deal found 4/2$1,377
This Delta deal was found by Cheapflights users on 4/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/233:00 pmDEN - LJU
2 stops36h 05mDelta
Tue 5/2012:35 pmLJU - DEN
2 stops39h 23mDelta
Deal found 4/2$1,384
This KLM deal was found by Cheapflights users on 4/2. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2110:40 amDEN - LJU
2 stops16h 55mKLM
Tue 5/209:05 amLJU - DEN
2 stops20h 52mKLM
Deal found 4/2$1,408
This SWISS deal was found by Cheapflights users on 4/2. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/2011:20 amDEN - LJU
2 stops38h 45mSWISS
Wed 5/217:25 pmLJU - DEN
2 stops34h 28mSWISS
Deal found 4/2$1,454

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 April 2, 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

Sat 9/13

7:50 pm-8:30 am

1 stop28h 40m

Ljubljana Joze Pucnik

Sat 9/27

8:10 pm-5:55 pm

1 stop29h 45m

$702

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Tue 4/22

6:35 pm-5:15 pm

1 stop14h 40m

Ljubljana Joze Pucnik

Wed 5/7

6:00 pm-3:47 pm

2 stops29h 47m

$930

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Sat 4/19

6:35 pm-8:40 pm

1 stop18h 05m

Ljubljana Joze Pucnik

Sat 5/17

7:55 pm-9:57 am

2 stops46h 02m

$959

Colorado SpringsLjubljana

COS - LJU

COSLJU

Colorado Springs

Fri 5/16

2:00 pm-12:35 pm

2 stops14h 35m

Ljubljana Joze Pucnik

Fri 5/23

8:00 pm-5:52 pm

2 stops29h 52m

$1,218

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Mon 9/22

4:15 pm-7:25 pm

1 stop19h 10m

Ljubljana Joze Pucnik

Tue 9/30

10:10 am-3:35 pm

1 stop13h 25m

$1,220

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Thu 4/24

12:13 pm-8:45 am

2 stops36h 32m

Ljubljana Joze Pucnik

Sat 5/17

9:30 am-9:38 pm

2 stops20h 08m

$1,377

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Wed 4/23

3:00 pm-11:05 am

2 stops36h 05m

Ljubljana Joze Pucnik

Thu 5/22

12:35 pm-5:39 pm

2 stops37h 04m

$1,384

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Mon 4/21

10:40 am-11:35 am

2 stops16h 55m

Ljubljana Joze Pucnik

Tue 5/20

9:05 am-9:57 pm

2 stops20h 52m

$1,408

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Sun 4/20

11:20 am-10:05 am

2 stops38h 45m

Ljubljana Joze Pucnik

Wed 5/21

7:25 pm-9:53 pm

2 stops34h 28m

$1,454

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Thu 8/28

7:50 pm-8:30 am

1 stop28h 40m

$884

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

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 April 2, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Slovenia as you normally would.

Rainfall in Slovenia by month

Plan your trip to Slovenia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Slovenia ranges from 1.6 - 2.8 inches per month. October is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Slovenia when rainfall is around 1.6 in.

Temperature in Slovenia by month

Plan your trip to Slovenia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Slovenia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Slovenia

Get insights into the airlines that provide service to Slovenia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Slovenia. Reviews last updated April 2, 2025.
To help decide which airline to fly from Colorado to Slovenia, see what other customers have to say about Delta, KLM and Finnair. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,898 reviews
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,572 reviews
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Turkish Airlines
7.3
Good
3,748 reviews
Delta
8.0
Very good
7,898 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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.

  • What is the cheapest month to book a flight from Colorado to Slovenia?

    Currently, February is the cheapest month in which you can book a flight from Colorado to Slovenia (average of $710). Flying from Colorado to Slovenia in June is currently the most expensive (average of $1,520). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$594Average$652FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$796Average$1,240FlexibilityNo cancel feeOn-time76%

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