Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £136

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 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
1 Sep — 8 Sep1
1 adult
1 adult, Economy, 0 bags
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 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 2 August 2026.

Wed 11/1117:30
LHR
-
KEF
1 stop17h 20m
Scandinavian Airlines
Mon 16/1118:05
KEF
-
LHR
1 stop21h 55m
Scandinavian Airlines
Deal found 29/7£209
Fri 4/1220:25
LHR
-
KEF
1 stop17h 20m
KLM
Tue 8/1214:45
KEF
-
LHR
1 stop6h 05m
KLM
Deal found 1/8£212
Thu 10/906:30
LHR
-
KEF
1 stop26h 20m
KLM
Sun 13/919:15
KEF
-
LHR
1 stop11h 25m
KLM
Deal found 1/8£213
Wed 23/921:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Wed 30/907:40
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 31/7£214
Thu 13/807:05
LHR
-
KEF
1 stop25h 00m
Scandinavian Airlines
Thu 20/808:50
KEF
-
LHR
1 stop11h 50m
Scandinavian Airlines
Deal found 31/7£214
Fri 30/1012:15
LHR
-
KEF
Nonstop3h 15m
Icelandair
Fri 6/1107:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 31/7£215
Wed 26/809:55
LHR
-
KEF
1 stop10h 05m
KLM
Wed 2/920:00
KEF
-
LHR
1 stop10h 40m
KLM
Deal found 29/7£216
Sat 26/921:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Fri 2/1016:10
KEF
-
LHR
Nonstop3h 10m
Icelandair
Deal found 30/7£216
Fri 30/1020:35
LHR
-
KEF
Nonstop3h 15m
Icelandair
Wed 4/1107:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 29/7£217
Sun 6/906:30
LHR
-
KEF
1 stop12h 45m
KLM
Fri 11/908:50
KEF
-
LHR
1 stop11h 05m
KLM
Deal found 2/8£218
Sat 31/1021:25
LHR
-
KEF
Nonstop2h 10m
Icelandair
Wed 11/1116:20
KEF
-
LHR
Nonstop3h 10m
Icelandair
Deal found 31/7£219
Wed 28/1020:35
LHR
-
KEF
Nonstop3h 15m
Icelandair
Sat 7/1107:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 31/7£219

Find flight deals from Heathrow to Keflavik Intl

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Keflavik Intl (KEF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 2 August 2026.

Round-trip from

£209

One-way from

£136

Popular in

August

Cheapest in

January

Average price

£381

Good round-trip deal

£419 or less

Good one-way deal

£272 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 11/11-16/11
  • 2 total stops
  • 39h 15m total
  • London to Reykjavik
Search Deals
26/9
  • 26/9
  • 1 total stop
  • 10h 20m total
  • London to Reykjavik
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (£65 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Reykjavik Keflavik Intl.
Search Deals
Price to beat on a one-way flight from London Heathrow to Reykjavik Keflavik Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Keflavik Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 August 2026.
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

Tue 17/11

07:35-10:55

Nonstop3h 20m

Reykjavik Keflavik Intl

Thu 19/11

11:45-14:55

Nonstop3h 10m

£220

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 1/10

20:55-07:50

1 stop11h 55m

Reykjavik Keflavik Intl

Sat 10/10

20:05-07:40

1 stop10h 35m

£222

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 2/10

21:25-23:35

Nonstop3h 10m

Reykjavik Keflavik Intl

Sun 11/10

07:40-11:55

Nonstop3h 15m

£228

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 3/11

19:50-10:45

1 stop14h 55m

Reykjavik Keflavik Intl

Fri 6/11

11:35-18:50

1 stop7h 15m

£239

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 8/10

17:30-07:05

1 stop14h 35m

Reykjavik Keflavik Intl

Tue 20/10

10:30-17:40

1 stop6h 10m

£243

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 16/9

09:55-19:00

1 stop10h 05m

Reykjavik Keflavik Intl

Wed 23/9

20:00-09:00

1 stop12h 00m

£254

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 1/1

20:25-13:45

1 stop17h 20m

Reykjavik Keflavik Intl

Fri 22/1

11:35-20:50

2 stops9h 15m

£270

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
Fastest return journey

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 6/9

21:25-23:35

Nonstop3h 10m

Reykjavik Keflavik Intl

Fri 25/9

16:10-20:20

Nonstop3h 10m

£320

Flights are sorted by cheapest return flights first.

Deals found on 31/7

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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.
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

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 £381). 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?

Find hourly flight availability from Heathrow to Keflavik Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 August 2026.

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?

Airfare is below average for this route at the moment.

London Heathrow Airport to Reykjavik Keflavik Intl Airport flights typically cost between £288 and £552 in November.
The cheapest return price found within the last 5 days was £209 on Scandinavian Airlines (11 Nov–16 Nov).

Reviews of airlines servicing Keflavik Intl

Get insights into the airlines that provide service to Keflavik Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Keflavik Intl. Reviews last updated 2 August 2026.
Check out reviews from past customers who have flown with Scandinavian Airlines,Icelandair, andeasyJet 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
1,912 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.0

Food

6.8

Boarding

7.7

Entertainment

6.8

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
1,912 reviews
Scandinavian Airlines
7.4
Good
1,912 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.0

Food

6.8

Boarding

7.7

Entertainment

6.8

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
720 reviews
Scandinavian Airlines
7.4
Good
1,912 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.0

Food

6.8

Boarding

7.7

Entertainment

6.8

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:(
easyJet
6.9
Okay
1,920 reviews
Scandinavian Airlines
7.4
Good
1,912 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.0

Food

6.8

Boarding

7.7

Entertainment

6.8

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
8,143 reviews
Scandinavian Airlines
7.4
Good
1,912 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.0

Food

6.8

Boarding

7.7

Entertainment

6.8

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

Find useful and relevant information for your journey from Heathrow to Keflavik Intl. 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 London Heathrow Airport to Reykjavik Keflavik Intl Airport?

    Icelandair, British Airways, 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 8h 40m. 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 easyJet is currently your cheapest option to Reykjavik Keflavik Intl Airport, with prices starting at £48. Additional return tickets that might be worth considering are offered by Icelandair and British Airways, with the lowest prices starting at £119 and £131, respectively. These flights start at 80% 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 (85%), Emirates (85%) and Air India (85%).

  • 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 £734, our data shows the cheapest flight currently is £145. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £142 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 £381). 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

Travelling to a place near Reykjavik Keflavik Intl Airport?

Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locations
Kopavogur
Keflavik
Hveragerdi

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Keflavik Intl

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Keflavik Intl flights
Luton to Keflavik Intl flights
London City to Keflavik Intl flights
Stansted to Keflavik Intl flights
Southend to Keflavik Intl flights

Top 4 airlines flying from Heathrow to Keflavik Intl

Discover the top 4 airlines that operate flights from Heathrow to Keflavik Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 August 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£48Average£88FlexibilityNo cancel feeOn-time86%
Search easyJet flights
IcelandairCheapest£119Average£271FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£131Average£233FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Scandinavian AirlinesCheapest£167Average£351FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Keflavik Intl?

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.

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

Cheapflights helps you find that perfect flight to Keflavik Intl from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

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.

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

Yes! Start tracking prices for Heathrow to Keflavik Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.