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.

How often are flights from London to Reykjavik delayed?

About 9% of weekly flights between London and Reykjavik have experienced delays in the past year, with the average delay time being 114 minutes.

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

Over the past year, British Airways have had the lowest number of delays on this route, with just 9% of flights being delayed.

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

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

In terms of precipitation, rainfall in Reykjavik Keflavik Intl Airport ranges from 40.0 - 80.0 inches per month. January is typically the wettest month, when rainfall can reach 80.0 mm. May is typically the driest time to visit Reykjavik Keflavik Intl Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to Reykjavik Keflavik Intl 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 11.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

What are the most popular airlines that fly from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

Consider Icelandair, British Airways or Scandinavian Airlines when booking your flight. These represent the most popular airlines when flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport.

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

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

How can I find direct flights from Heathrow to Keflavik Intl?

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

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

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

£128+ Cheap Flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport

Q: How much does it cost for a return flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

Airfare is below average for this route at the moment. London Heathrow Airport to Reykjavik Keflavik Intl Airport flights typically cost between £270 and £436 in September. The cheapest return price found within the last 5 days was £208 on KLM (10 Sept–13 Sept).

Cheapflights Tip: The best prices from London Heathrow to Reykjavik Keflavik Intl are usually found in January or November, booked 80 days in advance, depart on a Sunday or Thursday and return on a Friday

Cheap flight deals from Heathrow to Keflavik Intl

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

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One-way

Cheapest flights from Heathrow to Keflavik Intl
Explore the most affordable flight options available from Heathrow to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 July 2026.

Thu 10/908:40

LHR

KEF

1 stop24h 10m

KLM

Sun 13/919:15

KEF

LHR

1 stop11h 25m

KLM

Deal found 14/7£208

Thu 20/818:05

LHR

KEF

1 stop14h 35m

Scandinavian Airlines

Sun 23/815:25

KEF

LHR

1 stop17h 10m

Scandinavian Airlines

Deal found 14/7£210

Thu 13/810:35

LHR

KEF

1 stop8h 00m

Scandinavian Airlines

Sun 23/815:25

KEF

LHR

1 stop17h 10m

Scandinavian Airlines

Deal found 16/7£210

Fri 4/1220:25

LHR

KEF

1 stop17h 20m

KLM

Sun 6/1214:45

KEF

LHR

1 stop18h 15m

KLM

Deal found 16/7£211

Mon 7/921:25

LHR

KEF

Nonstop3h 10m

Icelandair

Tue 15/907:40

KEF

LHR

Nonstop3h 15m

Icelandair

Deal found 15/7£212

Tue 8/921:25

LHR

KEF

Nonstop3h 10m

Icelandair

Wed 16/907:40

KEF

LHR

Nonstop3h 15m

Icelandair

Deal found 18/7£213

Thu 17/1206:30

LHR

KEF

1 stop7h 15m

KLM

Sat 26/1214:45

KEF

LHR

1 stop6h 05m

KLM

Deal found 17/7£213

Tue 25/821:25

LHR

KEF

Nonstop3h 10m

Icelandair

Fri 4/916:10

KEF

LHR

Nonstop3h 10m

Icelandair

Deal found 17/7£214

Tue 8/921:25

LHR

KEF

Nonstop3h 10m

Icelandair

Tue 15/907:40

KEF

LHR

Nonstop3h 15m

Icelandair

Deal found 17/7£215

Mon 2/1120:35

LHR

KEF

Nonstop3h 15m

Multiple Airlines

Fri 6/1111:35

KEF

LHR

1 stop22h 00m

Multiple Airlines

Deal found 19/7£216

Sat 5/921:25

LHR

KEF

Nonstop3h 10m

Icelandair

Mon 7/907:40

KEF

LHR

Nonstop3h 15m

Icelandair

Deal found 15/7£217

Wed 7/1021:25

LHR

KEF

Nonstop3h 10m

Icelandair

Tue 13/1007:40

KEF

LHR

Nonstop3h 15m

Icelandair

Deal found 16/7£218

Find flight deals from Heathrow to Keflavik Intl

Round-trip from	£208
One-way from	£128
Popular in	August
Cheapest in	January
Average price	£328
Good round-trip deal	£358 or less
Good one-way deal	£240 or less

KLM
10/9-13/9
2 total stops
35h 35m total
London to Reykjavik

Search Deals

Scandinavian Airlines
3/9
1 total stop
15h 10m total
London to Reykjavik

Search Deals

Highest demand for flights based on searches. 24% potential increase in price (£58 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 2026

Search Deals

Price to beat on a round-trip flight from London Heathrow to Reykjavik Keflavik Intl.

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Price to beat on a one-way flight from London Heathrow to Reykjavik Keflavik Intl.

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Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 28/10

20:35-23:50

Nonstop3h 15m

Reykjavik Keflavik Intl

Sat 7/11

07:35-10:50

Nonstop3h 15m

£219

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 20/9

21:25-23:35

Nonstop3h 10m

Reykjavik Keflavik Intl

Mon 28/9

07:40-11:55

Nonstop3h 15m

£245

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 28/8

09:55-00:35

2 stops15h 40m

Reykjavik Keflavik Intl

Wed 2/9

20:00-09:00

1 stop12h 00m

£259

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 1/10

11:45-18:15

1 stop7h 30m

Reykjavik Keflavik Intl

Sat 10/10

20:05-07:40

1 stop10h 35m

£268

Fastest return journey

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 8/10

07:35-09:40

Nonstop3h 05m

Reykjavik Keflavik Intl

Wed 21/10

11:00-15:10

Nonstop3h 10m

£271

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 27/11

10:20-17:20

1 stop7h 00m

Reykjavik Keflavik Intl

Mon 30/11

18:05-09:20

1 stop15h 15m

£274

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 10/9

07:35-09:40

Nonstop3h 05m

Reykjavik Keflavik Intl

Sun 13/9

10:20-14:30

Nonstop3h 10m

£313

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 4/11

07:05-10:50

1 stop27h 45m

Reykjavik Keflavik Intl

Thu 5/11

18:05-21:40

1 stop27h 35m

£326

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 3/9

06:40-09:40

1 stop28h 00m

Reykjavik Keflavik Intl

Tue 8/9

11:15-21:35

1 stop9h 20m

£345

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 2/9

08:40-16:45

2 stops9h 05m

Reykjavik Keflavik Intl

Sun 6/9

19:15-07:40

1 stop11h 25m

£347

Flights are sorted by cheapest return flights first.

Deals found on 18/7

Showing 1-10 of 19 resultsSorted by cheapest first

Best time to book a flight from Heathrow to Keflavik Intl

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

LHR-KEF

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 Reykjavik Keflavik Intl Airport

Prices

Delays

How far ahead should I book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

The price you pay for your flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 79 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of £150). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August 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.

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

When flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

Reviews of airlines servicing Keflavik Intl

Check out reviews from past customers who have flown with Scandinavian Airlines,Icelandair, andBritish Airways from London Heathrow Airport to Reykjavik Keflavik Intl Airport 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.

Scandinavian Airlines

7.4

Good

1,887 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(

Scandinavian Airlines

7.4

Good

1,887 reviews

Scandinavian Airlines

7.4

Good

1,887 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(

Icelandair

7.0

Good

713 reviews

Scandinavian Airlines

7.4

Good

1,887 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(

British Airways

6.7

Okay

8,126 reviews

Scandinavian Airlines

7.4

Good

1,887 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(

Related info for your journey

How long is the flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?
Icelandair and KLM can get you from London Heathrow Airport to Reykjavik Keflavik Intl Airport in just under 3h 15m. Your travel time can differ by up to 12h 25m. There are 1177 mi between London Heathrow Airport and Reykjavik Keflavik Intl Airport. This flight may include one or multiple stops.
What are the cheapest airlines flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport round-trip?
Flying on Icelandair is currently your cheapest option to Reykjavik Keflavik Intl Airport, with prices starting at £119. Additional return tickets that might be worth considering are offered by British Airways and Scandinavian Airlines, with the lowest prices starting at £132 and £167, respectively. These flights start at 51% lower than the current average price 3 months from now.
What are the most reliable airlines from London Heathrow Airport to Reykjavik Keflavik Intl Airport?
The top 3 most reliable airlines when flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport are Icelandair (86%), Emirates (86%) and Air India (86%).
What are the cheapest flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport?
While on average a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport is generally £731, our data shows the cheapest flight currently is £140. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £144 for that flight.
Can I find deals for flights from Heathrow to Keflavik Intl that include hotel bookings?
Yes. In addition to deals on Heathrow to Keflavik Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Keflavik Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Keflavik Intl.
Can I find deals for business class flights from Heathrow to Keflavik Intl?
Yes. Cheapflights offers flight deals from Heathrow to Keflavik Intl 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 Reykjavik Keflavik Intl Airport?
Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of £150). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August 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.

See more FAQs

Hveragerdi

Kopavogur

Keflavik

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London City to Keflavik Intl flights

Luton to Keflavik Intl flights

Southend to Keflavik Intl flights

Top 3 airlines flying from Heathrow to Keflavik Intl

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£119	Average£271	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
British Airways	Cheapest£132	Average£239	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Scandinavian Airlines	Cheapest£167	Average£352	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights

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When you search for this flight from Heathrow to Keflavik Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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Need flexible booking options for your flight to Keflavik Intl from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £128

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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Keflavik Intl

Cheapest flights from Heathrow to Keflavik IntlExplore the most affordable flight options available from Heathrow to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 July 2026.

Explore the most affordable flight options available from Heathrow to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 July 2026.

Best flights from Heathrow to Keflavik IntlDiscover carefully curated flight deals from Heathrow to Keflavik Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 July 2026.

Discover carefully curated flight deals from Heathrow to Keflavik Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 July 2026.

Direct flights from Heathrow to Keflavik IntlExplore direct flight options from Heathrow to Keflavik Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 19 July 2026.

Explore direct flight options from Heathrow to Keflavik Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 19 July 2026.

Last-minute flights from Heathrow to Keflavik IntlDiscover last-minute flight deals from Heathrow to Keflavik Intl. Data last updated 19 July 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Keflavik Intl. Data last updated 19 July 2026 and is based on user searches.

One-way flights from Heathrow to Keflavik IntlSearch for one-way flight options from Heathrow to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated 19 July 2026.

Search for one-way flight options from Heathrow to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated 19 July 2026.

Find flight deals from Heathrow to Keflavik Intl

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Cheapflights Fare Finder

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

Best time to book a flight from Heathrow to Keflavik Intl

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

Cheapflights Insights

How far ahead should I book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

The price you pay for your flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 79 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

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

When flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

How often are flights from London to Reykjavik delayed?

About 9% of weekly flights between London and Reykjavik have experienced delays in the past year, with the average delay time being 114 minutes.

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

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the early afternoon 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 London to Reykjavik flights?

Over the past year, British Airways have had the lowest number of delays on this route, with just 9% of flights being delayed.

Reviews of airlines servicing Keflavik Intl

Related info for your journey

How long is the flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

What are the cheapest airlines flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport round-trip?

What are the most reliable airlines from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

What are the cheapest flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

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

How can I find direct flights from Heathrow to Keflavik Intl?

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

What is the cheapest month to book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

Travelling to a place near Reykjavik Keflavik Intl Airport?

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Alternative routes for Heathrow to Keflavik Intl

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Complete your trip

Complete your trip to Keflavik Intl by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Iceland

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Search flights from Heathrow to Keflavik Intl by cabin class

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Other flights to Keflavik Intl

Explore flights to Keflavik Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 19 July 2026.

Heathrow and Keflavik Intl flights

Browse other Heathrow and Keflavik Intl flight options. Last updated on 19 July 2026.

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Top 3 airlines flying from Heathrow to Keflavik Intl

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Cheapest flights from Heathrow to Keflavik Intl
Explore the most affordable flight options available from Heathrow to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 July 2026.

Best flights from Heathrow to Keflavik Intl
Discover carefully curated flight deals from Heathrow to Keflavik Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 July 2026.

Direct flights from Heathrow to Keflavik Intl
Explore direct flight options from Heathrow to Keflavik Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 19 July 2026.

Last-minute flights from Heathrow to Keflavik Intl
Discover last-minute flight deals from Heathrow to Keflavik Intl. Data last updated 19 July 2026 and is based on user searches.

One-way flights from Heathrow to Keflavik Intl
Search for one-way flight options from Heathrow to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated 19 July 2026.