Question 1

What are the cheapest airlines to fly from London Heathrow Airport to Slovenia one-way?

Accepted Answer

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.

Question 2

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

Accepted Answer

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.

Question 3

What is the cheapest day to fly from London Heathrow Airport to Slovenia?

Accepted Answer

Travellers seeking maximum savings on their London Heathrow Airport to Slovenia flight should consider departing on Tuesday at midday when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 4

E

Accepted Answer

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.

Question 5

E

Accepted Answer

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).

Question 6

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

Accepted Answer

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.

Question 7

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

Accepted Answer

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

Question 8

What is the cheapest day to fly round-trip from London Heathrow Airport to Slovenia?

Accepted Answer

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 27% on your flight compared to booking on days when demand is much higher.

Question 9

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

Accepted Answer

Users have found that booking a flight from London Heathrow Airport to Slovenia at least 58 days early can save you up to 67% on average compared to booking a flight this week. If booking 58 days before your flight isn’t an option for you, users have found flights from London Heathrow Airport to Slovenia for as little as £201 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £258 for flights departing within the next 3 days.

Question 10

What is the cheapest month to fly from London Heathrow Airport to Slovenia?

Accepted Answer

Due to multiple factors, expect to potentially pay more when booking in September. For low rates, March can be a great choice for travel to Slovenia. Flights to Slovenia from London Heathrow Airport in March are about £184 on average during March, but can be found for as low as £64.

Question 11

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

Accepted Answer

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.

Question 12

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

Accepted Answer

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

Question 13

How can I find direct flights from Heathrow to Slovenia?

Accepted Answer

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

Question 14

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

Accepted Answer

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.

Question 15

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

Accepted Answer

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!

Question 16

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

Accepted Answer

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.

Question 17

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

Accepted Answer

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.

Question 18

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

Accepted Answer

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.

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

Airline	Cheapest	Average	Flexibility	On-time
easyJet	Cheapest£64	Average£143	FlexibilityNo cancel fee	On-time86%	Search easyJet flights
British Airways	Cheapest£132	Average£281	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
SWISS	Cheapest£134	Average£192	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Lufthansa	Cheapest£139	Average£193	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Brussels Airlines	Cheapest£143	Average£230	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
LOT	Cheapest£144	Average£223	FlexibilityNo cancel fee	On-time81%	Search LOT flights

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.

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

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find 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 3 July 2025.

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.

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

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?

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.

Reviews of airlines servicing Slovenia

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.

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?

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

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Alternative routes for Heathrow to Slovenia

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Top 6 airlines flying from Heathrow to Slovenia

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

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

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 3 July 2025.