How long is the flight from London Heathrow Airport to Slovenia?

A quick flight from London Heathrow Airport to Slovenia can take about 18h 40m. Air Serbia provides one of the quickest options available for as low as £188. The distance from London Heathrow Airport to Slovenia is about 766 mi.

In terms of precipitation, rainfall in Slovenia ranges from 40.0 - 70.0 inches per month. October is typically the wettest month, when rainfall can reach 70.0 mm. January is typically the driest time to visit Slovenia when rainfall is around 40.0 mm.

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 19.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

What are the cheapest flights from London Heathrow Airport to Slovenia?

The cheapest flight price from London Heathrow Airport to Slovenia is £216. On average you can expect to pay £342. The most popular route, (London Heathrow - Ljubljana Joze Pucnik), can usually be booked for £160.

What are the most popular airlines that fly from London Heathrow Airport to Slovenia?

Before booking your flight from London Heathrow Airport to Slovenia check out the most popular airlines for this route: British Airways, Lufthansa or SWISS.

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

When flying from London Heathrow Airport to Slovenia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

How can I find direct flights from Heathrow to Slovenia?

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

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

Yes. Cheapflights offers flight deals from Heathrow 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.

£68+ Cheap Flights from London Heathrow Airport to Slovenia

Cheap flight deals from Heathrow to Slovenia

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from Heathrow to Slovenia
Explore the most affordable flight options available from Heathrow to Slovenia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 November 2026.

Sun 6/1209:55 -

1 stop9h 35m

Mon 21/1220:45 -

1 stop13h 25m

Deal found 6/11£150

Mon 14/1209:55 -

1 stop9h 05m

Sun 20/1220:45 -

1 stop16h 35m

Deal found 5/11£152

Thu 10/1209:55 -

1 stop6h 10m

Mon 14/1220:45 -

1 stop13h 25m

Deal found 6/11£157

Sat 5/1217:10 -

1 stop4h 35m

Sun 6/1210:45 -

1 stop7h 05m

Deal found 8/11£160

Sun 6/1209:55 -

1 stop9h 35m

Sun 13/1221:20 -

1 stop12h 50m

Deal found 6/11£167

Thu 10/1220:50 -

2 stops43h 20m

Mon 14/1220:45 -

1 stop13h 25m

Deal found 6/11£169

Mon 7/1209:55 -

1 stop9h 05m

Mon 14/1220:45 -

1 stop13h 25m

Deal found 9/11£170

Sun 6/1206:00 -

1 stop7h 15m

Sun 13/1206:40 -

1 stop9h 05m

Deal found 6/11£171

Mon 30/1115:45 -

1 stop19h 35m

Tue 8/1212:55 -

1 stop25h 55m

Deal found 8/11£172

Find flight deals from Heathrow to Slovenia

Round-trip from	£150
One-way from	£68
Popular in	August
Cheapest in	November
Average price	£86
Good round-trip deal	£257 or less

Vueling
6/12-21/12
2 total stops
23h 00m total
London to Slovenia

Search Deals

Vueling
14/12-31/12
1 total stop
9h 05m total
London to Slovenia

Search Deals

Highest demand for flights based on searches. 28% potential increase in price (£57 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£7 potential savings vs. average return price).

Search Deals

Average for round-trip flights in November 2026

Search Deals

Price to beat on a round-trip flight from London Heathrow to Slovenia.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Slovenia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

LondonLjubljana

LHR London Heathrow - LJU Ljubljana Joze Pucnik

LHRLJU

London Heathrow

Wed 7/4

14:00-17:15

Nonstop2h 15m

Ljubljana Joze Pucnik

Wed 31/12

00:00-00:00

Nonstop0h 00m

£97

LondonLjubljana

LHR London Heathrow - LJU Ljubljana Joze Pucnik

LHRLJU

London Heathrow

Thu 31/12

20:25-12:20

1 stop14h 55m

Ljubljana Joze Pucnik

Wed 31/12

00:00-00:00

Nonstop0h 00m

£104

LondonLjubljana

LHR London Heathrow - LJU Ljubljana Joze Pucnik

LHRLJU

London Heathrow

Mon 15/2

13:20-19:55

1 stop5h 35m

Ljubljana Joze Pucnik

Wed 31/12

00:00-00:00

Nonstop0h 00m

£107

LondonLjubljana

LHR London Heathrow - LJU Ljubljana Joze Pucnik

LHRLJU

London Heathrow

Sat 1/5

19:55-08:50

1 stop11h 55m

Ljubljana Joze Pucnik

Wed 31/12

00:00-00:00

Nonstop0h 00m

£107

LondonLjubljana

LHR London Heathrow - LJU Ljubljana Joze Pucnik

LHRLJU

London Heathrow

Mon 29/3

07:25-19:40

1 stop11h 15m

Ljubljana Joze Pucnik

Wed 31/12

00:00-00:00

Nonstop0h 00m

£113

LondonLjubljana

LHR London Heathrow - LJU Ljubljana Joze Pucnik

LHRLJU

London Heathrow

Thu 4/2

17:50-11:40

2 stops16h 50m

Ljubljana Joze Pucnik

Wed 31/12

00:00-00:00

Nonstop0h 00m

£119

LondonLjubljana

LHR London Heathrow - LJU Ljubljana Joze Pucnik

LHRLJU

London Heathrow

Mon 15/2

20:25-11:40

2 stops38h 15m

Ljubljana Joze Pucnik

Wed 31/12

00:00-00:00

Nonstop0h 00m

£121

LondonLjubljana

LHR London Heathrow - LJU Ljubljana Joze Pucnik

LHRLJU

London Heathrow

Mon 23/11

13:20-19:55

1 stop5h 35m

Ljubljana Joze Pucnik

Wed 31/12

00:00-00:00

Nonstop0h 00m

£132

LondonLjubljana

LHR London Heathrow - LJU Ljubljana Joze Pucnik

LHRLJU

London Heathrow

Tue 17/11

13:20-19:55

1 stop5h 35m

Ljubljana Joze Pucnik

Wed 31/12

00:00-00:00

Nonstop0h 00m

£132

LondonLjubljana

LHR London Heathrow - LJU Ljubljana Joze Pucnik

LHRLJU

London Heathrow

Fri 12/3

20:25-11:40

2 stops14h 15m

Ljubljana Joze Pucnik

Wed 31/12

00:00-00:00

Nonstop0h 00m

£141

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 20 resultsSorted by cheapest first

Best time to book a flight from Heathrow to Slovenia

Have a flexible travel schedule? Discover the best time to fly to Slovenia from Heathrow with our price prediction graph.

LHR-LJU

Estimated return 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 London Heathrow Airport to Slovenia

LHR-SI0

LHR-LJU

What is the cheapest month to book a flight from London Heathrow Airport to Slovenia?

Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to Slovenia (average of £184). Flying from London Heathrow Airport to Slovenia in August is currently the most expensive (average of £320). 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.

How far ahead should I book a flight from London Heathrow Airport to Slovenia?

The price you pay for your flight from London Heathrow Airport to Slovenia may vary depending on when you book. For the best chance of a lower fare, look to book 41 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Slovenia

Check out reviews from past customers who have flown with SWISS,easyJet, andLufthansa from London Heathrow Airport to Slovenia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

SWISS

7.5

Good

2,116 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Henriette,Dec 2025

ZRH - JNB

The flight was good but again my luggage was delayed. The 2nd time now. I know it us at the airlines fault but maybe there have to be more control on which luggage on on which plane. Especially if a flight has been delayed.

SWISS

7.5

Good

2,116 reviews

SWISS

7.5

Good

2,116 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Henriette,Dec 2025

ZRH - JNB

easyJet

6.9

Okay

1,916 reviews

SWISS

7.5

Good

2,116 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Henriette,Dec 2025

ZRH - JNB

Lufthansa

6.8

Okay

8,291 reviews

SWISS

7.5

Good

2,116 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Henriette,Dec 2025

ZRH - JNB

British Airways

6.7

Okay

8,287 reviews

SWISS

7.5

Good

2,116 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Henriette,Dec 2025

ZRH - JNB

Related info for your journey

How long is the flight from London Heathrow Airport to Slovenia?
A quick flight from London Heathrow Airport to Slovenia can take about 18h 40m. Air Serbia provides one of the quickest options available for as low as £188. The distance from London Heathrow Airport to Slovenia is about 766 mi.
What are the cheapest flights from London Heathrow Airport to Slovenia?
The cheapest flight price from London Heathrow Airport to Slovenia is £216. On average you can expect to pay £342. The most popular route, (London Heathrow - Ljubljana Joze Pucnik), can usually be booked for £160.
Can I find deals for flights from Heathrow to Slovenia that include hotel bookings?
Yes. In addition to deals on Heathrow to Slovenia flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Slovenia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Slovenia.
Can I find deals for business class flights from Heathrow to Slovenia?
Yes. Cheapflights offers flight deals from Heathrow 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 London Heathrow Airport to Slovenia?
Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to Slovenia (average of £184). Flying from London Heathrow Airport to Slovenia in August is currently the most expensive (average of £320). 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 4 airlines flying from Heathrow to Slovenia

Airline	Cheapest	Average	Flexibility	On-time
easyJet	Cheapest£113	Average£226	FlexibilityNo cancel fee	On-time86%	Search easyJet flights
Lufthansa	Cheapest£157	Average£205	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£176	Average£286	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
SWISS	Cheapest£185	Average£272	FlexibilityNo cancel fee	On-time79%	Search SWISS flights

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How does Cheapflights help users find flights from Heathrow to Slovenia?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Slovenia from Heathrow today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Slovenia?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Heathrow to Slovenia for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Heathrow to Slovenia with no change fees?

Certainly. Search results for flights to Slovenia from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Heathrow to Slovenia become cheaper?

Not ready to book yet? You can track prices for flights from Heathrow to Slovenia on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Cheap flights from London Heathrow Airport to Slovenia from £68

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Slovenia

Cheapest flights from Heathrow to SloveniaExplore the most affordable flight options available from Heathrow to Slovenia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 November 2026.

Explore the most affordable flight options available from Heathrow to Slovenia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 November 2026.

Best flights from Heathrow to SloveniaDiscover carefully curated flight deals from Heathrow to Slovenia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 November 2026.

Discover carefully curated flight deals from Heathrow to Slovenia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 November 2026.

Direct flights from Heathrow to SloveniaExplore direct flight options from Heathrow to Slovenia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 November 2026.

Explore direct flight options from Heathrow to Slovenia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 November 2026.

Last-minute flights from Heathrow to SloveniaDiscover last-minute flight deals from Heathrow to Slovenia. Data last updated 10 November 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Slovenia. Data last updated 10 November 2026 and is based on user searches.

One-way flights from Heathrow to SloveniaSearch for one-way flight options from Heathrow to Slovenia. Find affordable one-way fares based on user searches. Data last updated 10 November 2026.

Search for one-way flight options from Heathrow to Slovenia. Find affordable one-way fares based on user searches. Data last updated 10 November 2026.

Find flight deals from Heathrow to Slovenia

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One-way from

Popular in

Cheapest in

Average price

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Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Slovenia that are best for you.

Best time to book a flight from Heathrow to Slovenia

Have a flexible travel schedule? Discover the best time to fly to Slovenia from Heathrow with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from London Heathrow Airport to Slovenia?

How far ahead should I book a flight from London Heathrow Airport to Slovenia?

The price you pay for your flight from London Heathrow Airport to Slovenia may vary depending on when you book. For the best chance of a lower fare, look to book 41 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Slovenia

Check out reviews from past customers who have flown with SWISS,easyJet, andLufthansa from London Heathrow Airport to Slovenia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

How long is the flight from London Heathrow Airport to Slovenia?

What are the cheapest flights from London Heathrow Airport to Slovenia?

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

How can I find direct flights from Heathrow to Slovenia?

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

What is the cheapest month to book a flight from London Heathrow Airport to Slovenia?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Slovenia

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Slovenia by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to

Book a non-stop flight to one of these other cities located in .

Search flights from Heathrow to Slovenia by cabin class

Find flights from Heathrow to Slovenia, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Heathrow and Slovenia flights

Browse other Heathrow and Slovenia flight options. Last updated on 10 November 2026.

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Top 4 airlines flying from Heathrow to Slovenia

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How does Cheapflights help users find flights from Heathrow to Slovenia?

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Can Cheapflights find flights from Heathrow to Slovenia with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Slovenia become cheaper?

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Cheapest flights from Heathrow to Slovenia
Explore the most affordable flight options available from Heathrow to Slovenia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 November 2026.

Best flights from Heathrow to Slovenia
Discover carefully curated flight deals from Heathrow to Slovenia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 November 2026.

Direct flights from Heathrow to Slovenia
Explore direct flight options from Heathrow to Slovenia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 November 2026.

Last-minute flights from Heathrow to Slovenia
Discover last-minute flight deals from Heathrow to Slovenia. Data last updated 10 November 2026 and is based on user searches.

One-way flights from Heathrow to Slovenia
Search for one-way flight options from Heathrow to Slovenia. Find affordable one-way fares based on user searches. Data last updated 10 November 2026.