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

Airlines like Air Serbia 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 . 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.

£61+ Flights from Slovenia to London Heathrow Airport

Cheap flight deals from Slovenia to Heathrow

Enter your travel dates to find the best prices.

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 5 December 2025.

Fri 26/1213:50LJU - LHR

1 stop4h 15mMultiple Airlines

Tue 30/1206:00LHR - LJU

1 stop7h 05mMultiple Airlines

Deal found 4/12£176

Thu 25/1220:10LJU - LHR

1 stop3h 45mLufthansa

Mon 29/1206:35LHR - LJU

1 stop11h 55mLufthansa

Deal found 4/12£184

Sat 13/1212:25LJU - LHR

1 stop10h 00mMultiple Airlines

Tue 16/1220:25LHR - LJU

2 stops14h 15mMultiple Airlines

Deal found 3/12£196

Fri 26/1213:50LJU - LHR

1 stop4h 15mMultiple Airlines

Sun 28/1206:00LHR - LJU

1 stop6h 40mMultiple Airlines

Deal found 3/12£198

Sat 13/1217:10LJU - LHR

1 stop17h 25mLOT

Tue 16/1206:30LHR - LJU

1 stop9h 00mLOT

Deal found 4/12£200

Sat 13/1214:50LJU - LHR

1 stop7h 50mSWISS

Tue 16/1206:00LHR - LJU

1 stop7h 05mSWISS

Deal found 3/12£201

Tue 9/1217:10LJU - LHR

1 stop5h 50mLOT

Tue 16/1206:30LHR - LJU

1 stop9h 00mLOT

Deal found 3/12£207

Tue 30/1220:45LJU - LHR

1 stop16h 35mAir Serbia

Tue 6/113:20LHR - LJU

1 stop18h 35mAir Serbia

Deal found 2/12£208

Wed 31/1210:35LJU - LHR

1 stop7h 15mLufthansa

Sun 4/120:15LHR - LJU

1 stop11h 50mLufthansa

Deal found 3/12£208

Tue 9/1220:45LJU - LHR

1 stop16h 35mMultiple Airlines

Tue 16/1206:30LHR - LJU

1 stop9h 00mMultiple Airlines

Deal found 3/12£211

Thu 11/1214:25LJU - LHR

1 stop4h 25mMultiple Airlines

Sat 3/120:15LHR - LJU

1 stop11h 50mMultiple Airlines

Deal found 4/12£211

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 5 December 2025.

Mon 26/120:45LJU - LHR

1 stop16h 35mAir Serbia

Wed 4/213:20LHR - LJU

1 stop18h 35mAir Serbia

Deal found 4/12£136

Thu 5/214:25LJU - LHR

1 stop26h 55mSWISS

Mon 9/213:45LHR - LJU

1 stop7h 40mSWISS

Deal found 3/12£157

Tue 20/120:45LJU - LHR

1 stop16h 35mAir Serbia

Wed 28/113:20LHR - LJU

1 stop18h 35mAir Serbia

Deal found 4/12£136

Tue 27/120:45LJU - LHR

1 stop16h 35mAir Serbia

Wed 4/213:20LHR - LJU

1 stop18h 35mAir Serbia

Deal found 4/12£136

Fri 16/106:30LJU - LHR

1 stop10h 50mSWISS

Fri 23/117:10LHR - LJU

1 stop4h 20mSWISS

Deal found 2/12£157

Wed 28/109:45LJU - LHR

1 stop27h 35mAir Serbia

Wed 4/213:20LHR - LJU

1 stop18h 35mAir Serbia

Deal found 4/12£136

Thu 12/306:30LJU - LHR

1 stop16h 10mSWISS

Sun 15/306:00LHR - LJU

1 stop15h 30mSWISS

Deal found 3/12£157

Sat 16/509:50LJU - LHR

1 stop10h 20mAir Serbia

Sat 23/519:55LHR - LJU

1 stop12h 05mAir Serbia

Deal found 3/12£138

Sat 17/106:30LJU - LHR

1 stop13h 45mSWISS

Sat 24/117:10LHR - LJU

1 stop19h 30mSWISS

Deal found 3/12£157

Tue 20/120:45LJU - LHR

1 stop16h 35mAir Serbia

Thu 29/113:20LHR - LJU

1 stop18h 05mAir Serbia

Deal found 4/12£156

Thu 29/109:45LJU - LHR

1 stop27h 35mAir Serbia

Sat 7/213:20LHR - LJU

1 stop5h 35mAir Serbia

Deal found 4/12£156

Mon 4/509:50LJU - LHR

1 stop27h 45mAir Serbia

Sat 9/519:55LHR - LJU

1 stop23h 10mAir Serbia

Deal found 3/12£157

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 5 December 2025.

Thu 14/519:00LJU - LHR

Nonstop2h 20mBritish Airways

Sun 17/517:25LHR - LJU

Nonstop2h 15mBritish Airways

Deal found 2/12£218

Thu 21/519:00LJU - LHR

Nonstop2h 20mBritish Airways

Sun 24/517:25LHR - LJU

Nonstop2h 15mBritish Airways

Deal found 2/12£233

Mon 30/315:10LJU - LHR

Nonstop2h 25mBritish Airways

Fri 3/417:10LHR - LJU

Nonstop2h 10mBritish Airways

Deal found 2/12£241

Sat 16/520:15LJU - LHR

Nonstop2h 20mBritish Airways

Sat 23/516:05LHR - LJU

Nonstop2h 15mBritish Airways

Deal found 3/12£279

Fri 22/521:05LJU - LHR

Nonstop2h 20mBritish Airways

Mon 25/511:00LHR - LJU

Nonstop2h 15mBritish Airways

Deal found 3/12£289

Mon 4/515:10LJU - LHR

Nonstop2h 25mBritish Airways

Sat 9/507:00LHR - LJU

Nonstop2h 10mBritish Airways

Deal found 3/12£306

Mon 4/515:10LJU - LHR

Nonstop2h 25mBritish Airways

Mon 11/511:00LHR - LJU

Nonstop2h 15mBritish Airways

Deal found 2/12£633

Last-minute flights from Slovenia to Heathrow
Discover last-minute flight deals from Slovenia to Heathrow. Data last updated 5 December 2025 and is based on user searches.

Fri 16/106:30LJU - LHR

1 stop5h 45mMultiple Airlines

Sun 18/106:50LHR - LJU

1 stop5h 05mMultiple Airlines

Deal found 2/12£152

Fri 16/106:30LJU - LHR

1 stop7h 30mSWISS

Sun 18/106:00LHR - LJU

1 stop15h 30mSWISS

Deal found 2/12£154

Fri 16/106:30LJU - LHR

1 stop10h 50mSWISS

Fri 23/117:10LHR - LJU

1 stop4h 20mSWISS

Deal found 2/12£157

Sat 17/106:30LJU - LHR

1 stop5h 45mSWISS

Sat 24/120:05LHR - LJU

1 stop16h 35mSWISS

Deal found 3/12£153

Sun 18/113:40LJU - LHR

1 stop4h 25mMultiple Airlines

Sun 25/106:00LHR - LJU

1 stop15h 30mMultiple Airlines

Deal found 4/12£150

Mon 19/120:45LJU - LHR

1 stop16h 35mAir Serbia

Tue 27/113:20LHR - LJU

1 stop18h 35mAir Serbia

Deal found 4/12£169

Tue 20/120:45LJU - LHR

1 stop16h 35mAir Serbia

Tue 27/113:20LHR - LJU

1 stop5h 35mAir Serbia

Deal found 4/12£135

Wed 21/109:45LJU - LHR

1 stop27h 35mAir Serbia

Fri 23/113:20LHR - LJU

1 stop18h 35mAir Serbia

Deal found 2/12£175

Wed 28/109:45LJU - LHR

1 stop27h 35mAir Serbia

Fri 6/213:20LHR - LJU

1 stop18h 35mAir Serbia

Deal found 4/12£136

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 5 December 2025.

Fri 10/414:55LJU - LHR

1 stop22h 40mAir Serbia

Deal found 3/12£61

Wed 1/409:50LJU - LHR

1 stop27h 45mAir Serbia

Deal found 4/12£81

Tue 7/420:45LJU - LHR

1 stop16h 50mAir Serbia

Deal found 2/12£89

Sun 25/108:35LJU - LHR

2 stops25h 35mMultiple Airlines

Deal found 2/12£90

Sun 25/112:25LJU - LHR

2 stops31h 50mKLM

Deal found 2/12£91

Wed 18/312:25LJU - LHR

2 stops9h 25mKLM

Deal found 4/12£93

Fri 10/421:05LJU - LHR

Nonstop2h 20mBritish Airways

Deal found 3/12£94

Sun 25/120:45LJU - LHR

1 stop16h 35mAir Serbia

Deal found 2/12£94

Tue 7/412:20LJU - LHR

2 stops9h 35mKLM

Deal found 2/12£100

Wed 8/409:50LJU - LHR

1 stop27h 45mAir Serbia

Deal found 2/12£103

Mon 12/109:45LJU - LHR

2 stops24h 25mMultiple Airlines

Deal found 2/12£104

Find flight deals from Slovenia to Heathrow

Round-trip from	£135
One-way from	£61
Popular in	August
Cheapest in	March
Average price	£157

Air Serbia
20/1-27/1
2 total stops
22h 10m total
Slovenia to London

Search Deals

Air Serbia
10/4
1 total stop
22h 40m total
Slovenia to London

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£26 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£4 potential savings vs. average return price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LjubljanaLondon

LJU - LHR

LJULHR

Ljubljana Joze Pucnik

Mon 26/1

20:45-12:20

1 stop16h 35m

London Heathrow

Wed 4/2

13:20-08:55

1 stop18h 35m

£136

LjubljanaLondon

LJU - LHR

LJULHR

Ljubljana Joze Pucnik

Tue 20/1

20:45-12:20

1 stop16h 35m

London Heathrow

Wed 28/1

13:20-08:55

1 stop18h 35m

£136

LjubljanaLondon

LJU - LHR

LJULHR

Ljubljana Joze Pucnik

Tue 27/1

20:45-12:20

1 stop16h 35m

London Heathrow

Wed 4/2

13:20-08:55

1 stop18h 35m

£136

LjubljanaLondon

LJU - LHR

LJULHR

Ljubljana Joze Pucnik

Wed 28/1

09:45-12:20

1 stop27h 35m

London Heathrow

Wed 4/2

13:20-08:55

1 stop18h 35m

£136

LjubljanaLondon

LJU - LHR

LJULHR

Ljubljana Joze Pucnik

Sat 16/5

09:50-19:10

1 stop10h 20m

London Heathrow

Sat 23/5

19:55-09:00

1 stop12h 05m

£138

LjubljanaLondon

LJU - LHR

LJULHR

Ljubljana Joze Pucnik

Tue 20/1

20:45-12:20

1 stop16h 35m

London Heathrow

Thu 29/1

13:20-08:25

1 stop18h 05m

£156

LjubljanaLondon

LJU - LHR

LJULHR

Ljubljana Joze Pucnik

Thu 29/1

09:45-12:20

1 stop27h 35m

London Heathrow

Sat 7/2

13:20-19:55

1 stop5h 35m

£156

LjubljanaLondon

LJU - LHR

LJULHR

Ljubljana Joze Pucnik

Thu 5/2

14:25-16:20

1 stop26h 55m

London Heathrow

Mon 9/2

13:45-22:25

1 stop7h 40m

£157

LjubljanaLondon

LJU - LHR

LJULHR

Ljubljana Joze Pucnik

Fri 16/1

06:30-16:20

1 stop10h 50m

London Heathrow

Fri 23/1

17:10-22:30

1 stop4h 20m

£157

LjubljanaLondon

LJU - LHR

LJULHR

Ljubljana Joze Pucnik

Thu 12/3

06:30-21:40

1 stop16h 10m

London Heathrow

Sun 15/3

06:00-22:30

1 stop15h 30m

£157

Flights are sorted by cheapest return flights first.

Deals found on 4/12

Showing 1-10 of 20 results

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.

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

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 £93). Flying from Slovenia to London Heathrow Airport in August is currently the most expensive (average of £201). 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?

It’s typically best to fly out from Slovenia to London Heathrow Airport in the afternoon. Doing so could potentially save you 68% on the flight price compared to flying in the evening, which is usually more expensive.

How often are flights from Slovenia to London delayed?

About 22% of weekly flights between Slovenia and London have experienced delays in the past year, with the average delay time being 112 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?

Tuesday tends to have the lowest number of delays on this route, whereas Monday 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 22% 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 16h 35m. 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, March is the cheapest month in which you can book a flight from Slovenia to London Heathrow Airport (average of £93). Flying from Slovenia to London Heathrow Airport in August is currently the most expensive (average of £201). 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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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 £61

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 10/4. 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 5 December 2025.

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 5 December 2025.

Find flight deals from Slovenia to Heathrow

Keep the following information in mind while searching for Slovenia to Heathrow flight deals. Data was last updated 5 December 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

Everything you need to know about your flight from Slovenia to London Heathrow Airport

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 5 December 2025.

How often are flights from Slovenia to London delayed?

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

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

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

Related info for your journey

Find useful and relevant information for your journey from Slovenia to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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 5 December 2025.