Denver (DEN) → Ljubljana (LJU)
About Denver to Ljubljana Flights
Discover the best flights from Denver to Ljubljana, covering 8,697 km in approximately 11h 22m. Denver (DEN) to Ljubljana (LJU) is one of the major long-haul routes connecting United States and Slovenia. With 7 major airlines operating this route, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Denver to Ljubljana.
12-Month Price History
Flight prices from Denver to Ljubljana vary significantly throughout the year. February typically offers the best deals with average prices around $1417, while July sees the highest prices, averaging $2376. Savvy travelers can save up to 40% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
74 days
For best prices
Booking Tips
For the best prices on Denver to Ljubljana flights, we recommend booking 76 days in advance. International flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
Frontier Airlines F9 | $1660 | - | - |
Southwest Airlines WN | $1780 | - | - |
American Airlines AA | $2260 | $9210 | $15290 |
Delta Air Lines DL | $2300 | $8010 | $14920 |
United Airlines UA | $2330 | $7300 | $12640 |
SkyWest Airlines OO | $2450 | $8720 | $12810 |
Adria Airways JP | $2810 | $7430 | $14160 |
Frontier Airlines
F9
Economy
$1660
Business
-
First
-
Southwest Airlines
WN
Economy
$1780
Business
-
First
-
American Airlines
AA
Economy
$2260
Business
$9210
First
$15290
Delta Air Lines
DL
Economy
$2300
Business
$8010
First
$14920
United Airlines
UA
Economy
$2330
Business
$7300
First
$12640
SkyWest Airlines
OO
Economy
$2450
Business
$8720
First
$12810
Adria Airways
JP
Economy
$2810
Business
$7430
First
$14160
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
Denver → Zagreb
Denver International (DEN) to Zagreb Franjo Tuđman (ZAG)
Distance: 8,821 km
Average price: $1850
Denver → Venice
Denver International (DEN) to Venice Marco Polo (VCE)
Distance: 8,642 km
Average price: $1815
Denver → Venice
Denver International (DEN) to Venice Marco Polo (VCE)
Distance: 8,642 km
Average price: $1815
Denver → Zagreb
Denver International (DEN) to Zagreb (ZAG)
Distance: 8,821 km
Average price: $1850
Don't Forget Travel Insurance!
Found your flight? Protect your trip with SafetyWing's comprehensive travel insurance. Perfect for trips to Ljubljana, Slovenia.
- Medical coverage up to $250,000
- Trip interruption & delays covered
- Lost luggage protection included
From just $45/month • Works in 180+ countries • COVID-19 coverage included
Trusted by 100,000+ travelers
Frequently Asked Questions
How long is the flight from Denver to Ljubljana?
The flight time from Denver (DEN) to Ljubljana (LJU) is approximately 11 hours and 22 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between Denver and Ljubljana?
The aerial distance between Denver and Ljubljana is 8,697 kilometers (5,404 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Denver to Ljubljana?
Several airlines operate flights between Denver and Ljubljana, including United Airlines, Southwest Airlines, Frontier Airlines and 4 more airlines. Most flights on this route include one or more stops.
What is the cheapest month to fly from Denver to Ljubljana?
Based on historical data, February typically offers the lowest airfares for flights from Denver to Ljubljana. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to Ljubljana?
For the best prices on Denver to Ljubljana flights, we recommend booking 96 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from Denver to Ljubljana?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of United States traveling to Slovenia should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between Denver and Ljubljana?
Denver operates on America/Denver time zone, while Ljubljana is in the Europe/Ljubljana time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.