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

Airlines like Air Serbia fly from Slovenia to London Heathrow Airport in about 27h 50m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 766 mi.

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

If weather is an important factor for your trip to London Heathrow Airport, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

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

How can I find direct flights from Slovenia to Heathrow?

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

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

Yes. Cheapflights offers flight deals from Slovenia to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£64+ Cheap Flights from Slovenia to London Heathrow Airport

Cheap flight deals from Slovenia to Heathrow

Enter your travel dates to find the best prices.

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

Tue 29/1209:30 -

1 stop27h 50m

Mon 4/113:20 -

1 stop5h 35m

Deal found 8/9£145

Wed 14/1014:50 -

1 stop4h 00m

Sat 17/1008:45 -

1 stop4h 05m

Deal found 5/9£148

Thu 3/1217:10 -

1 stop25h 10m

Sun 6/1209:55 -

1 stop9h 35m

Deal found 7/9£150

Fri 4/1213:45 -

1 stop20h 50m

Sun 6/1209:55 -

1 stop9h 35m

Deal found 7/9£151

Sat 17/1005:30 -

1 stop12h 40m

Fri 23/1006:30 -

1 stop17h 00m

Deal found 6/9£154

Thu 10/1220:45 -

1 stop16h 35m

Sun 13/1209:55 -

1 stop9h 35m

Deal found 6/9£157

Fri 9/1017:05 -

1 stop17h 15m

Fri 16/1006:30 -

1 stop17h 00m

Deal found 9/9£162

Fri 16/1021:15 -

Nonstop2h 20m

Sun 18/1017:15 -

Nonstop2h 20m

Deal found 8/9£165

Find flight deals from Slovenia to Heathrow

Round-trip from	£145
One-way from	£64
Popular in	July
Cheapest in	March
Average price	£251

Air Serbia
7/2-15/2
2 total stops
35h 15m total
Slovenia to London

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Air Serbia
6/12-31/12
1 total stop
27h 50m total
Slovenia to London

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Highest demand for flights based on searches. 26% potential increase in price (£49 potential increase over avg. return price).

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Cheapest flight prices on average. 6% potential price decrease (£9 potential savings vs. average return price).

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Average for round-trip flights in September 2026

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Cheapflights Fare Finder

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

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Route

Depart

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Price

Cheapest return flight

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Wed 2/12

09:30-12:20

1 stop27h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£65

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Fri 5/3

14:55-12:20

1 stop22h 25m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£65

Fastest return journey

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Sat 6/3

12:45-17:00

1 stop5h 15m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£77

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Sun 7/3

20:45-12:20

1 stop16h 35m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£85

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Fri 9/10

13:30-09:20

1 stop20h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£89

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Mon 7/12

12:25-20:50

2 stops9h 25m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£91

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Wed 14/10

13:30-09:20

1 stop20h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£97

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Mon 1/3

09:30-12:20

1 stop27h 50m

London Heathrow

Fri 5/3

13:20-19:55

1 stop5h 35m

£145

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Thu 17/12

09:30-12:20

1 stop27h 50m

London Heathrow

Mon 21/12

13:20-19:55

1 stop5h 35m

£165

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Thu 15/10

18:30-21:35

1 stop4h 05m

London Heathrow

Sun 18/10

06:00-14:00

1 stop7h 00m

£169

Flights are sorted by cheapest return flights first.

Deals found on 6/9

Showing 1-10 of 18 resultsSorted by cheapest first

Best time to book a flight from Slovenia to Heathrow

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

LJU-LHR

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 Slovenia to London Heathrow Airport

SI0-LHR

LJU-LHR

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

Currently, January is the cheapest month in which you can book a flight from Slovenia to London Heathrow Airport (average of £165). Flying from Slovenia to London Heathrow Airport in July is currently the most expensive (average of £371). 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 SI to LHR?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Slovenia to London Heathrow Airport as you normally would.

How often are flights from Slovenia to London delayed?

About 26% of weekly flights between Slovenia and London have experienced delays in the past year, with the average delay time being 118 minutes.

What is the most punctual flight time for Slovenia to London flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Slovenia to London flights?

Over the past year, British Airways have had the lowest number of delays on this route, with just 26% of flights being delayed.

Related info for your journey

How long is the flight from Slovenia to London Heathrow Airport?
Airlines like Air Serbia fly from Slovenia to London Heathrow Airport in about 27h 50m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 766 mi.
Can I find deals for flights from Slovenia to Heathrow that include hotel bookings?
Yes. In addition to deals on Slovenia to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Slovenia to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Slovenia to Heathrow.
Can I find deals for business class flights from Slovenia to Heathrow?
Yes. Cheapflights offers flight deals from Slovenia to Heathrow 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 Slovenia to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Slovenia to London Heathrow Airport (average of £165). Flying from Slovenia to London Heathrow Airport in July is currently the most expensive (average of £371). 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.

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

Cheapflights makes it easy to find Slovenia to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Slovenia to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes! Cheapflights helps users easily find flights from Slovenia to Heathrow with no change fees.

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

Yes, Cheapflights offers price alerts on Slovenia to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from Slovenia to London Heathrow Airport from £64

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Slovenia to Heathrow

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

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

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

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

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

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

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

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

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

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

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

Best time to book a flight from Slovenia to Heathrow

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

Cheapflights Insights

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

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

Find hourly flight availability from Slovenia to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 10 September 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Slovenia to London Heathrow Airport as you normally would.

How often are flights from Slovenia to London delayed?

About 26% of weekly flights between Slovenia and London have experienced delays in the past year, with the average delay time being 118 minutes.

What is the most punctual flight time for Slovenia to London flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Slovenia to London flights?

Over the past year, British Airways have had the lowest number of delays on this route, with just 26% of flights being delayed.

Related info for your journey

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

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

How can I find direct flights from Slovenia to Heathrow?

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

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

Travelling to a place near London Heathrow Airport?

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Alternative routes for Slovenia to Heathrow

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Complete your trip

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Other flights to Heathrow

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

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

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

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

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

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

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