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Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £51

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 7/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
21 Feb — 28 Feb1
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 69 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 22 January 2026.

Mon 2/220:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Mon 9/207:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 21/1£117
Sat 7/320:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Sat 14/316:20
KEF
-
LHR
Nonstop3h 10m
Icelandair
Deal found 21/1£118
Fri 27/220:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Sun 1/307:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 21/1£119
Tue 10/220:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Fri 13/207:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 21/1£120
Wed 4/220:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Sun 8/207:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 21/1£121
Tue 14/421:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Mon 20/407:40
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 21/1£122
Fri 24/421:25
LHR
-
KEF
Nonstop3h 10m
Icelandair
Sun 26/407:40
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 21/1£123
Mon 23/220:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Sat 28/207:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 20/1£124
Sun 1/220:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Thu 5/207:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 20/1£124
Fri 27/220:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Wed 4/307:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 21/1£125

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 22 January 2026.

Round-trip from

£117

One-way from

£51

Popular in

July

Cheapest in

January

Average price

£150

Good round-trip deal

£279 or less

Good one-way deal

£232 or less
Icelandair
  • Icelandair
  • 2/2-9/2
  • Nonstop
  • 6h 35m total
  • London to Reykjavik
Search Deals
Icelandair
  • Icelandair
  • 7/2
  • Nonstop
  • 3h 20m total
  • London to Reykjavik
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£46 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 22 January 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

Heathrow

Fly to

Keflavik Intl

Route

Depart

Return

Price

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 1/3

20:35-23:55

Nonstop3h 20m

Reykjavik Keflavik Intl

Sat 7/3

07:35-10:50

Nonstop3h 15m

£132

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 2/2

20:35-23:55

Nonstop3h 20m

Reykjavik Keflavik Intl

Fri 6/2

16:20-19:30

Nonstop3h 10m

£132

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 15/3

07:20-10:40

Nonstop3h 20m

Reykjavik Keflavik Intl

Fri 20/3

18:10-21:10

Nonstop3h 00m

£143

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 11/5

07:40-09:45

Nonstop3h 05m

Reykjavik Keflavik Intl

Fri 15/5

10:30-14:40

Nonstop3h 10m

£159

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 7/4

21:05-10:25

2 stops14h 20m

Reykjavik Keflavik Intl

Fri 10/4

07:55-16:25

1 stop7h 30m

£164

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sat 2/5

13:05-15:15

Nonstop3h 10m

Reykjavik Keflavik Intl

Sun 10/5

07:40-11:55

Nonstop3h 15m

£165

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 28/4

21:25-23:35

Nonstop3h 10m

Reykjavik Keflavik Intl

Thu 7/5

16:10-20:20

Nonstop3h 10m

£165

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 29/4

21:25-23:35

Nonstop3h 10m

Reykjavik Keflavik Intl

Thu 7/5

16:10-20:20

Nonstop3h 10m

£165

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 17/4

18:40-09:40

1 stop16h 00m

Reykjavik Keflavik Intl

Tue 28/4

10:30-21:35

2 stops10h 05m

£185

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 20/4

19:30-10:25

2 stops15h 55m

Reykjavik Keflavik Intl

Thu 23/4

11:15-21:20

2 stops9h 05m

£189

Flights are sorted by cheapest return flights first.

Deals found on 21/1

Showing 1-10 of 23 results
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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?

Use this chart to determine the optimal time to book a return flight from Heathrow to Keflavik Intl. Price data was last updated on 16 January 2026.

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 69 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 £62). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in July 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 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 22 January 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.

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 22 January 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
7.3
Good
1,660 reviews
Check prices

Food

6.6

Overall

7.3

Crew

8.0

Comfort

7.3

Boarding

7.6

Entertainment

6.6

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
Scandinavian Airlines
7.3
Good
1,660 reviews
Scandinavian Airlines
7.3
Good
1,660 reviews
Check prices

Food

6.6

Overall

7.3

Crew

8.0

Comfort

7.3

Boarding

7.6

Entertainment

6.6

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
Icelandair
7.1
Good
602 reviews
Scandinavian Airlines
7.3
Good
1,660 reviews
Check prices

Food

6.6

Overall

7.3

Crew

8.0

Comfort

7.3

Boarding

7.6

Entertainment

6.6

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
easyJet
6.9
Okay
1,864 reviews
Scandinavian Airlines
7.3
Good
1,660 reviews
Check prices

Food

6.6

Overall

7.3

Crew

8.0

Comfort

7.3

Boarding

7.6

Entertainment

6.6

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
British Airways
6.7
Okay
7,689 reviews
Scandinavian Airlines
7.3
Good
1,660 reviews
Check prices

Food

6.6

Overall

7.3

Crew

8.0

Comfort

7.3

Boarding

7.6

Entertainment

6.6

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu

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 Scandinavian Airlines can get you from London Heathrow Airport to Reykjavik Keflavik Intl Airport in just under 3h 20m. Your travel time can differ by up to 11h. 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 £49. Additional return tickets that might be worth considering are offered by British Airways and Icelandair, with the lowest prices starting at £116 and £119, respectively. These flights start at 77% 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 TAP AIR PORTUGAL (88%), Icelandair (85%) and Emirates (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 £827, our data shows the cheapest flight currently is £64. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £117 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 £62). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in July 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

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
Luton 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 22 January 2026.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£49Average£89FlexibilityNo cancel feeOn-time86%
Search easyJet flights
British AirwaysCheapest£116Average£230FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£119Average£239FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£135Average£257FlexibilityNo 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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