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Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £78

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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
26 May — 2 Jun1
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 53 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 26 April 2026.

Mon 1/621:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Thu 4/616:10
KEF
-
LHR
Nonstop3h 10m
Icelandair
Deal found 24/4£146
Fri 24/407:35
LHR
-
KEF
Nonstop3h 05m
British Airways
Sun 26/410:20
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 23/4£148
Wed 29/407:55
LHR
-
KEF
Nonstop3h 05m
British Airways
Sun 3/510:20
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 25/4£150
Sat 25/407:20
LHR
-
KEF
Nonstop3h 05m
British Airways
Mon 27/410:40
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 21/4£152
Sat 9/507:20
LHR
-
KEF
Nonstop3h 05m
British Airways
Tue 12/510:50
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 24/4£153
Thu 7/507:35
LHR
-
KEF
Nonstop3h 05m
British Airways
Tue 12/510:50
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 21/4£154
Thu 3/921:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Mon 7/907:40
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 22/4£157
Mon 7/921:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Mon 14/907:40
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 22/4£158
Tue 5/507:50
LHR
-
KEF
Nonstop3h 05m
British Airways
Tue 12/510:50
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 24/4£159
Fri 24/407:35
LHR
-
KEF
Nonstop3h 05m
British Airways
Mon 27/410:40
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 21/4£160

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 26 April 2026.

Round-trip from

£146

One-way from

£78

Popular in

August

Cheapest in

January

Average price

£199

Good round-trip deal

£337 or less

Good one-way deal

£271 or less
Icelandair
  • Icelandair
  • 1/6-4/6
  • Nonstop
  • 6h 20m total
  • London to Reykjavik
Search Deals
Icelandair
  • Icelandair
  • 13/5
  • Nonstop
  • 3h 10m total
  • London to Reykjavik
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£49 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 26 April 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

Thu 1/10

21:25-23:35

Nonstop3h 10m

Reykjavik Keflavik Intl

Sat 10/10

07:40-11:55

Nonstop3h 15m

£235

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sat 22/8

21:25-23:35

Nonstop3h 10m

Reykjavik Keflavik Intl

Tue 25/8

07:40-11:55

Nonstop3h 15m

£245

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 1/9

15:35-10:25

1 stop19h 50m

Reykjavik Keflavik Intl

Sat 5/9

18:35-09:35

1 stop14h 00m

£247

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 24/9

09:55-18:15

1 stop9h 20m

Reykjavik Keflavik Intl

Fri 2/10

08:50-20:55

1 stop11h 05m

£255

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 13/9

11:45-18:15

1 stop7h 30m

Reykjavik Keflavik Intl

Wed 16/9

20:00-09:00

1 stop12h 00m

£255

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

£256

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 14/9

06:40-16:15

1 stop10h 35m

Reykjavik Keflavik Intl

Sat 26/9

18:35-09:35

1 stop14h 00m

£277

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 23/9

08:40-19:00

1 stop11h 20m

Reykjavik Keflavik Intl

Wed 30/9

20:00-07:40

1 stop10h 40m

£291

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 4/10

19:30-09:40

1 stop15h 10m

Reykjavik Keflavik Intl

Sun 11/10

00:55-18:50

1 stop16h 55m

£295
Fastest return journey

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 26/7

07:25-09:30

Nonstop3h 05m

Reykjavik Keflavik Intl

Sat 1/8

10:20-14:25

Nonstop3h 05m

£323

Flights are sorted by cheapest return flights first.

Deals found on 22/4

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 52 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 £135). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of £344). 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 26 April 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 26 April 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
1,761 reviews
Check prices

Crew

8.0

Food

6.7

Entertainment

6.7

Comfort

7.3

Boarding

7.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
Scandinavian Airlines
7.4
Good
1,761 reviews
Scandinavian Airlines
7.4
Good
1,761 reviews
Check prices

Crew

8.0

Food

6.7

Entertainment

6.7

Comfort

7.3

Boarding

7.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
Icelandair
7.0
Good
642 reviews
Scandinavian Airlines
7.4
Good
1,761 reviews
Check prices

Crew

8.0

Food

6.7

Entertainment

6.7

Comfort

7.3

Boarding

7.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
British Airways
6.7
Okay
7,917 reviews
Scandinavian Airlines
7.4
Good
1,761 reviews
Check prices

Crew

8.0

Food

6.7

Entertainment

6.7

Comfort

7.3

Boarding

7.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.

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, Scandinavian Airlines, and KLM 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 16h 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 British Airways is currently your cheapest option to Reykjavik Keflavik Intl Airport, with prices starting at £118. Additional return tickets that might be worth considering are offered by Icelandair and Scandinavian Airlines, with the lowest prices starting at £118 and £155, respectively. These flights start at 48% 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 American Airlines (84%), Emirates (84%) and Air India (84%).

  • 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 £843, our data shows the cheapest flight currently is £116. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £146 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 £135). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of £344). 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
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 26 April 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£118Average£235FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£118Average£256FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£155Average£335FlexibilityNo 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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