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Cheap flights from London Heathrow Airport to Slovenia from £89

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 17/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LJU
8 Jul — 15 Jul1
1 adult

Cheap flight deals from Heathrow to Slovenia

Keep the following information in mind while searching for Heathrow to Slovenia flight deals. Data was last updated 3 July 2025.

Round-trip from

£140

One-way from

£89

Popular in

September

Cheapest in

March

Average price

£219

Good round-trip deal

£287 or less

Good one-way deal

£180 or less
British Airways
  • British Airways
  • 6/10-10/10
  • Nonstop
  • 4h 35m total
  • London to Slovenia
Air Serbia
  • Air Serbia
  • 17/9
  • 1 total stop
  • 18h 30m total
  • London to Slovenia
Highest demand for flights based on searches. 16% potential increase in price (£27 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£6 potential savings vs. average return price).
Average for round-trip flights in July 2025
Price to beat on a round-trip flight from London Heathrow to Slovenia.
Price to beat on a one-way flight from London Heathrow to Slovenia.

Find flight deals from Heathrow to Slovenia

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 3 July 2025.

Mon 6/1011:00LHR - LJU
Nonstop2h 15mBritish Airways
Fri 10/1021:05LJU - LHR
Nonstop2h 20mBritish Airways
Deal found 30/6£140
Sat 4/1007:00LHR - LJU
Nonstop2h 10mMultiple Airlines
Sun 12/1009:40LJU - LHR
1 stop10h 00mMultiple Airlines
Deal found 30/6£147
Sat 4/1019:55LHR - LJU
1 stop12h 05mAir Serbia
Sun 12/1009:40LJU - LHR
1 stop10h 00mAir Serbia
Deal found 30/6£154
Mon 6/1020:25LHR - LJU
1 stop11h 35mLufthansa
Mon 13/1013:20LJU - LHR
1 stop7h 20mLufthansa
Deal found 2/7£157
Tue 26/811:05LHR - LJU
1 stop5h 40mBrussels Airlines
Thu 4/918:35LJU - LHR
1 stop4h 00mBrussels Airlines
Deal found 2/7£166
Fri 12/908:40LHR - LJU
1 stop22h 35mSWISS
Sat 20/909:10LJU - LHR
1 stop13h 35mSWISS
Deal found 30/6£170

Cheapflights Fare Finder

Customise your flight search to find flights from Heathrow 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 858,174 searches. Data last updated 3 July 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Slovenia that are best for you.

Fly from

Heathrow

Fly to

Slovenia

Route

Depart

Return

Price

LondonLjubljana

LHR - LJU

LHRLJU

London Heathrow

Mon 6/10

11:00-14:15

Nonstop2h 15m

Ljubljana Joze Pucnik

Fri 10/10

21:05-22:25

Nonstop2h 20m

£140

LondonLjubljana

LHR - LJU

LHRLJU

London Heathrow

Sat 4/10

07:00-10:10

Nonstop2h 10m

Ljubljana Joze Pucnik

Sun 12/10

09:40-18:40

1 stop10h 00m

£147

LondonLjubljana

LHR - LJU

LHRLJU

London Heathrow

Sat 4/10

19:55-09:00

1 stop12h 05m

Ljubljana Joze Pucnik

Sun 12/10

09:40-18:40

1 stop10h 00m

£154

LondonLjubljana

LHR - LJU

LHRLJU

London Heathrow

Mon 6/10

20:25-09:00

1 stop11h 35m

Ljubljana Joze Pucnik

Mon 13/10

13:20-19:40

1 stop7h 20m

£157

LondonLjubljana

LHR - LJU

LHRLJU

London Heathrow

Tue 26/8

11:05-17:45

1 stop5h 40m

Ljubljana Joze Pucnik

Thu 4/9

18:35-21:35

1 stop4h 00m

£166

LondonLjubljana

LHR - LJU

LHRLJU

London Heathrow

Fri 12/9

08:40-08:15

1 stop22h 35m

Ljubljana Joze Pucnik

Sat 20/9

09:10-21:45

1 stop13h 35m

£170

LondonLjubljana

LHR - LJU

LHRLJU

London Heathrow

Wed 17/9

13:30-09:00

1 stop18h 30m

£89

LondonLjubljana

LHR - LJU

LHRLJU

London Heathrow

Mon 15/9

20:55-08:15

1 stop10h 20m

£91

LondonLjubljana

LHR - LJU

LHRLJU

London Heathrow

Wed 27/8

14:00-17:15

Nonstop2h 15m

£94

LondonLjubljana

LHR - LJU

LHRLJU

London Heathrow

Wed 1/10

07:25-12:40

1 stop4h 15m

£98

Flights are sorted by cheapest return flights first.

Deals found on 29/6

Showing 1-10 of 14 results
1
2

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.
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

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

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Slovenia (average of £103). Flying from London Heathrow Airport to Slovenia in July is currently the most expensive (average of £327). 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.

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

Find hourly flight availability from Heathrow 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 3 July 2025.

One of the essential ways to save on airfare from London Heathrow Airport to Slovenia is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at midday could potentially save you up to 16% on airfare.

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 3 July 2025.
Check out reviews from past customers who have flown with KLM, SWISS, andBrussels Airlines 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.

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Food

7.2

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Food

7.2

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Food

7.2

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Food

7.2

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Food

7.2

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Crew

8.4

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Food

7.2

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Slovenia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What are the cheapest airlines to fly from London Heathrow Airport to Slovenia one-way?

    The cheapest airline one-way is Air Serbia, with whom users have recently found tickets for as low as £89. However, be on the lookout for offers from KLM and British Airways, as they are both options that can get you from London Heathrow Airport to Slovenia for a low price.

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

    The cheapest flight price from London Heathrow Airport to Slovenia is £173. On average you can expect to pay £281. The most popular route, (London Heathrow - Ljubljana Joze Pucnik), can usually be booked for £135.

  • 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Slovenia (average of £103). Flying from London Heathrow Airport to Slovenia in July is currently the most expensive (average of £327). 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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Alternative routes for Heathrow to Slovenia

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

Top 6 airlines flying from Heathrow to Slovenia

Discover the top 6 airlines that operate flights from Heathrow 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 858,174 searches. Data last updated 3 July 2025.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£64Average£143FlexibilityNo cancel feeOn-time86%
Search easyJet flights
British AirwaysCheapest£132Average£281FlexibilityNo cancel feeOn-time70%
Search British Airways flights
SWISSCheapest£134Average£192FlexibilityNo cancel feeOn-time79%
Search SWISS flights
LufthansaCheapest£139Average£193FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Brussels AirlinesCheapest£143Average£230FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LOTCheapest£144Average£223FlexibilityNo cancel feeOn-time81%
Search LOT flights

Fly with Cheapflights

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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?

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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