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Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £111

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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
7 Aug — 14 Aug1
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 8 July 2026.

Thu 1/1021:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Thu 8/1007:40
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 7/7£203
Thu 13/810:35
LHR
-
KEF
1 stop8h 00m
Scandinavian Airlines
Thu 27/808:50
KEF
-
LHR
1 stop11h 50m
Scandinavian Airlines
Deal found 6/7£203
Thu 8/1007:05
LHR
-
KEF
1 stop25h 00m
Scandinavian Airlines
Tue 13/1017:05
KEF
-
LHR
1 stop23h 35m
Scandinavian Airlines
Deal found 4/7£204
Wed 28/1006:30
LHR
-
KEF
1 stop7h 15m
KLM
Sat 7/1114:45
KEF
-
LHR
1 stop6h 05m
KLM
Deal found 6/7£205
Tue 3/1107:35
LHR
-
KEF
Nonstop3h 20m
British Airways
Fri 6/1118:10
KEF
-
LHR
Nonstop3h 00m
British Airways
Deal found 5/7£206
Sat 7/1107:35
LHR
-
KEF
Nonstop3h 20m
British Airways
Mon 16/1111:50
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 6/7£206
Wed 30/921:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Sun 4/1007:40
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 7/7£207
Thu 1/1021:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Sun 4/1007:40
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 7/7£208
Fri 25/921:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Fri 2/1016:10
KEF
-
LHR
Nonstop3h 10m
Icelandair
Deal found 4/7£209
Fri 25/921:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Sat 3/1016:10
KEF
-
LHR
Nonstop3h 10m
Icelandair
Deal found 3/7£210

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 8 July 2026.

Round-trip from

£203

One-way from

£111

Popular in

August

Cheapest in

January

Average price

£314

Good round-trip deal

£366 or less

Good one-way deal

£270 or less
Icelandair
  • Icelandair
  • 1/10-8/10
  • Nonstop
  • 6h 25m total
  • London to Reykjavik
Search Deals
British Airways
  • British Airways
  • 10/12
  • Nonstop
  • 3h 20m total
  • London to Reykjavik
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£55 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.
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 8 July 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

06:30-13:45

1 stop7h 15m

Reykjavik Keflavik Intl

Sat 7/11

14:45-20:50

1 stop6h 05m

£203

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

£221
Fastest return journey

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 8/10

21:25-23:35

Nonstop3h 10m

Reykjavik Keflavik Intl

Tue 20/10

16:10-20:20

Nonstop3h 10m

£235

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 11/9

10:20-16:15

1 stop6h 55m

Reykjavik Keflavik Intl

Tue 22/9

17:05-09:20

1 stop15h 15m

£269

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 1/1

20:25-16:20

2 stops19h 55m

Reykjavik Keflavik Intl

Fri 8/1

14:45-20:50

1 stop6h 05m

£309

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 1/10

20:55-07:50

1 stop11h 55m

Reykjavik Keflavik Intl

Sat 10/10

20:05-16:15

1 stop19h 10m

£317

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sat 15/8

10:35-17:45

1 stop8h 10m

Reykjavik Keflavik Intl

Sat 29/8

18:35-09:35

1 stop14h 00m

£370

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 9/12

17:05-10:50

2 stops17h 45m

Reykjavik Keflavik Intl

Sun 13/12

12:25-07:55

2 stops19h 30m

£389

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 30/9

06:30-17:20

2 stops11h 50m

Reykjavik Keflavik Intl

Wed 7/10

11:15-07:40

2 stops19h 25m

£406
Cheapest one-way

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 19/11

07:25-10:45

Nonstop3h 20m

£111

Flights are sorted by cheapest return flights first.

Deals found on 7/7

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

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 £154). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of £374). 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 8 July 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?

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 8 July 2026.
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
1,874 reviews
Check prices

Boarding

7.7

Entertainment

6.7

Overall

7.4

Crew

8.0

Food

6.7

Comfort

7.3

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
1,874 reviews
Scandinavian Airlines
7.4
Good
1,874 reviews
Check prices

Boarding

7.7

Entertainment

6.7

Overall

7.4

Crew

8.0

Food

6.7

Comfort

7.3

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
702 reviews
Scandinavian Airlines
7.4
Good
1,874 reviews
Check prices

Boarding

7.7

Entertainment

6.7

Overall

7.4

Crew

8.0

Food

6.7

Comfort

7.3

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
8,105 reviews
Scandinavian Airlines
7.4
Good
1,874 reviews
Check prices

Boarding

7.7

Entertainment

6.7

Overall

7.4

Crew

8.0

Food

6.7

Comfort

7.3

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?

    KLM and Icelandair can get you from London Heathrow Airport to Reykjavik Keflavik Intl Airport in just under 3h 10m. Your travel time can differ by up to 4h 05m. 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 £120. Additional return tickets that might be worth considering are offered by British Airways and Scandinavian Airlines, with the lowest prices starting at £132 and £168, 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 (91%), Emirates (91%) and Air India (91%).

  • 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 £783, our data shows the cheapest flight currently is £151. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £153 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 £154). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of £374). 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
Hveragerdi
Kopavogur
Keflavik

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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
London City to Keflavik Intl flights
Stansted to Keflavik Intl flights
Luton to Keflavik Intl flights
Southend to Keflavik Intl flights

Top 3 airlines flying from Heathrow to Keflavik Intl

Discover the top 3 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 8 July 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£120Average£274FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£132Average£235FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Scandinavian AirlinesCheapest£168Average£354FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights

Fly with Cheapflights

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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.

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