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

Airlines like Air Serbia and SWISS fly from Slovenia to London Heathrow Airport in about 16h 35m. The time it takes to get you to your destination can typically vary by up to 1h 15m. Airlines will cover a distance of 766 mi. Both multi-stop and direct flights can be found to your destination and back.

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).

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

While on average a flight from Slovenia to London Heathrow Airport is generally £167, our data shows the cheapest flight currently is £95. When looking at the most popular route, (Ljubljana Joze Pucnik - London Heathrow), you can expect to pay £134 for that flight.

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.

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.

£63+ Cheap Flights from Slovenia to London Heathrow Airport

Cheap flight deals from Slovenia to Heathrow

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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 November 2026.

Tue 22/1220:45 -

1 stop16h 35m

Tue 29/1213:20 -

1 stop5h 35m

Deal found 6/11£142

Tue 29/1220:45 -

1 stop16h 35m

Thu 31/1213:20 -

1 stop24h 05m

Deal found 6/11£143

Wed 23/1220:45 -

1 stop16h 35m

Tue 29/1213:20 -

1 stop18h 40m

Deal found 9/11£145

Tue 29/1220:45 -

1 stop16h 35m

Tue 5/113:20 -

1 stop18h 40m

Deal found 6/11£146

Wed 30/1220:45 -

1 stop16h 35m

Sat 2/113:20 -

1 stop18h 40m

Deal found 6/11£147

Sat 12/1217:10 -

1 stop25h 10m

Mon 14/1209:55 -

1 stop9h 05m

Deal found 6/11£156

Mon 9/1112:25 -

1 stop5h 10m

Thu 12/1119:20 -

1 stop15h 20m

Deal found 8/11£157

Tue 29/1220:45 -

1 stop16h 35m

Mon 4/113:20 -

1 stop18h 40m

Deal found 6/11£163

Fri 4/1212:25 -

1 stop5h 10m

Sat 5/1206:30 -

1 stop4h 40m

Deal found 8/11£166

Tue 29/1220:45 -

1 stop16h 35m

Sat 2/113:20 -

1 stop18h 40m

Deal found 6/11£167

Fri 27/1113:55 -

1 stop8h 25m

Sun 29/1106:00 -

1 stop15h 45m

Deal found 6/11£172

Find flight deals from Slovenia to Heathrow

Round-trip from	£142
One-way from	£63
Popular in	July
Cheapest in	November
Average price	£75
Good one-way deal	£100 or less

Air Serbia
22/12-29/12
2 total stops
22h 10m total
Slovenia to London

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Vueling
24/1-31/12
1 total stop
12h 50m total
Slovenia to London

Search Deals

Highest demand for flights based on searches. 29% potential increase in price (£57 potential increase over avg. return price).

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Cheapest flight prices on average. 7% potential price decrease (£10 potential savings vs. average return price).

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Average for round-trip flights in November 2026

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Price to beat on a one-way flight from Slovenia to London Heathrow.

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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

Return

Price

Cheapest return flight

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Tue 1/12

09:30-12:20

1 stop27h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£64

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Thu 18/2

20:45-12:20

1 stop16h 35m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£66

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Wed 17/3

12:55-19:15

1 stop7h 20m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£75

Fastest return journey

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Thu 21/1

17:10-22:00

1 stop5h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£76

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Tue 16/3

12:55-07:40

1 stop19h 45m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£84

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Sun 24/1

12:25-20:50

2 stops9h 25m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£90

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Mon 15/2

12:25-20:50

2 stops9h 25m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£90

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Mon 28/12

15:05-12:20

1 stop22h 15m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£93

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Sat 5/12

20:45-12:20

1 stop16h 35m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£93

LjubljanaLondon

LJU Ljubljana Joze Pucnik - LHR London Heathrow

LJULHR

Ljubljana Joze Pucnik

Mon 7/12

09:30-12:20

1 stop27h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£93

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Showing 1-10 of 21 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, March is the cheapest month in which you can book a flight from Slovenia to London Heathrow Airport (average of £161). Flying from Slovenia to London Heathrow Airport in July is currently the most expensive (average of £375). 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 often are flights from Slovenia to London delayed?

About 28% 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 28% of flights being delayed.

Related info for your journey

How long is the flight from Slovenia to London Heathrow Airport?
Airlines like Air Serbia and SWISS fly from Slovenia to London Heathrow Airport in about 16h 35m. The time it takes to get you to your destination can typically vary by up to 1h 15m. Airlines will cover a distance of 766 mi. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest flights from Slovenia to London Heathrow Airport?
While on average a flight from Slovenia to London Heathrow Airport is generally £167, our data shows the cheapest flight currently is £95. When looking at the most popular route, (Ljubljana Joze Pucnik - London Heathrow), you can expect to pay £134 for that flight.
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, March is the cheapest month in which you can book a flight from Slovenia to London Heathrow Airport (average of £161). Flying from Slovenia to London Heathrow Airport in July is currently the most expensive (average of £375). 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 £63

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/1. 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 November 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 November 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 November 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 November 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 November 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 November 2026.

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

Discover last-minute flight deals from Slovenia to Heathrow. Data last updated 10 November 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 November 2026.

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

Find flight deals from Slovenia to Heathrow

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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?

How often are flights from Slovenia to London delayed?

About 28% 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 28% of flights being delayed.

Related info for your journey

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

What are the cheapest flights 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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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 November 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 November 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 November 2026.

Last-minute flights from Slovenia to Heathrow
Discover last-minute flight deals from Slovenia to Heathrow. Data last updated 10 November 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 November 2026.