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$697+ 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
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$697
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$1,391
From Colorado to Slovenia
Search Deals
Highest demand for flights based on searches. 40% potential increase in price ($840 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 21% potential price decrease ($223 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 31, 2025.

This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/137:50 pmDEN - LJU
1 stop15h 25mTurkish Airlines
Sat 9/209:25 amLJU - DEN
1 stop16h 30mTurkish Airlines
Deal found 7/30$697
This Ovago deal was found by Cheapflights users on 7/31. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/106:35 pmDEN - LJU
1 stop15h 15mBritish Airways
Thu 9/257:00 pmLJU - DEN
1 stop29h 25mBritish Airways
Deal found 7/31$795
This Expedia deal was found by Cheapflights users on 7/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/55:06 pmDEN - LJU
2 stops36h 39mMultiple Airlines
Sun 9/149:25 pmLJU - DEN
1 stop27h 00mMultiple Airlines
Deal found 7/30$936
This KAYAK deal was found by Cheapflights users on 7/31. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:58 pmDEN - LJU
2 stops35h 22mLufthansa
Sat 10/181:50 pmLJU - DEN
1 stop33h 45mLufthansa
Deal found 7/31$1,038
This Ovago deal was found by Cheapflights users on 7/30. 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.
Mon 8/1811:25 amDEN - LJU
2 stops14h 40mSWISS
Tue 8/2610:50 amLJU - DEN
2 stops17h 22mSWISS
Deal found 7/30$1,079

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 July 31, 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-7:15 pm

1 stop15h 25m

Ljubljana Joze Pucnik

Sat 9/20

9:25 am-5:55 pm

1 stop16h 30m

$697

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Wed 9/10

6:35 pm-5:50 pm

1 stop15h 15m

Ljubljana Joze Pucnik

Thu 9/25

7:00 pm-4:25 pm

1 stop29h 25m

$795

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Fri 9/5

5:06 pm-1:45 pm

2 stops36h 39m

Ljubljana Joze Pucnik

Sun 9/14

9:25 pm-4:25 pm

1 stop27h 00m

$936

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Sat 10/11

5:58 pm-1:20 pm

2 stops35h 22m

Ljubljana Joze Pucnik

Sat 10/18

1:50 pm-3:35 pm

1 stop33h 45m

$1,038

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Mon 8/18

11:25 am-10:05 am

2 stops14h 40m

Ljubljana Joze Pucnik

Tue 8/26

10:50 am-8:12 pm

2 stops17h 22m

$1,079

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Mon 9/15

8:28 pm-8:30 am

2 stops28h 02m

$755

DenverLjubljana

DEN - LJU

DENLJU

Denver Intl

Mon 9/15

4:15 pm-7:25 pm

1 stop19h 10m

$799

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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 July 31, 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.

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 July 31, 2025.
Peruse reviews from past customers who have flown with SWISS, Turkish Airlines, and Lufthansa from Colorado to Slovenia to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
SWISS
7.5
Good
1,686 reviews

Comfort

7.4

Boarding

7.7

Crew

8.2

Entertainment

6.8

Overall

7.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
SWISS
7.5
Good
1,686 reviews
SWISS
7.5
Good
1,686 reviews

Comfort

7.4

Boarding

7.7

Crew

8.2

Entertainment

6.8

Overall

7.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
Turkish Airlines
7.3
Good
3,933 reviews
SWISS
7.5
Good
1,686 reviews

Comfort

7.4

Boarding

7.7

Crew

8.2

Entertainment

6.8

Overall

7.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
Lufthansa
6.8
Okay
7,275 reviews
SWISS
7.5
Good
1,686 reviews

Comfort

7.4

Boarding

7.7

Crew

8.2

Entertainment

6.8

Overall

7.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
British Airways
6.6
Okay
7,222 reviews
SWISS
7.5
Good
1,686 reviews

Comfort

7.4

Boarding

7.7

Crew

8.2

Entertainment

6.8

Overall

7.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight

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 $1,443). 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$598Average$710FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$766Average$1,375FlexibilityNo cancel feeOn-time76%

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