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Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £87

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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
20 Jul — 27 Jul1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Reykjavik Keflavik Intl are usually found in January or February, booked 81 days in advance, depart on a Thursday or Sunday and return on a Monday

Cheap 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 15 July 2025.

Round-trip from

£154

One-way from

£87

Popular in

July

Cheapest in

January

Average price

£308

Good round-trip deal

£370 or less

Good one-way deal

£379 or less
Icelandair
  • Icelandair
  • 9/12-16/12
  • Nonstop
  • 6h 35m total
  • London to Reykjavik
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9/11
  • 9/11
  • 1 total stop
  • 11h 50m total
  • London to Reykjavik
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Highest demand for flights based on searches. 22% potential increase in price (£43 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£7 potential savings vs. average return price).
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Average for round-trip flights in July 2025
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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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Find flight deals from Heathrow to Keflavik Intl

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 15 July 2025.

Tue 9/1220:35LHR - KEF
Nonstop3h 20mIcelandair
Tue 16/1207:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 14/7£154
Tue 25/1107:35LHR - KEF
Nonstop3h 20mMultiple Airlines
Thu 27/1111:30KEF - LHR
1 stop6h 10mMultiple Airlines
Deal found 14/7£157
Mon 24/1107:35LHR - KEF
Nonstop3h 20mBritish Airways
Fri 28/1118:10KEF - LHR
Nonstop3h 00mBritish Airways
Deal found 14/7£160
Wed 5/1119:50LHR - KEF
1 stop14h 55mScandinavian Airlines
Mon 10/1113:00KEF - LHR
1 stop8h 35mScandinavian Airlines
Deal found 14/7£160
Thu 23/1017:50LHR - KEF
1 stop7h 20mLufthansa
Sun 26/1016:45KEF - LHR
1 stop16h 00mLufthansa
Deal found 14/7£161
Mon 15/920:05LHR - KEF
1 stop13h 30mSWISS
Tue 23/916:10KEF - LHR
1 stop14h 45mSWISS
Deal found 14/7£181

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 15 July 2025.
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

Tue 9/12

20:35-23:55

Nonstop3h 20m

Reykjavik Keflavik Intl

Tue 16/12

07:35-10:50

Nonstop3h 15m

£154

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 25/11

07:35-10:55

Nonstop3h 20m

Reykjavik Keflavik Intl

Thu 27/11

11:30-17:40

1 stop6h 10m

£157

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 24/11

07:35-10:55

Nonstop3h 20m

Reykjavik Keflavik Intl

Fri 28/11

18:10-21:10

Nonstop3h 00m

£160

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 5/11

19:50-10:45

1 stop14h 55m

Reykjavik Keflavik Intl

Mon 10/11

13:00-21:35

1 stop8h 35m

£160

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 23/10

17:50-00:10

1 stop7h 20m

Reykjavik Keflavik Intl

Sun 26/10

16:45-08:45

1 stop16h 00m

£161

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 15/9

20:05-08:35

1 stop13h 30m

Reykjavik Keflavik Intl

Tue 23/9

16:10-07:55

1 stop14h 45m

£181

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 9/11

06:50-18:40

1 stop11h 50m

£87

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 26/11

07:30-10:50

Nonstop3h 20m

£90

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 16/10

15:35-07:05

1 stop16h 30m

£103

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sat 30/8

21:25-23:35

Nonstop3h 10m

£108

Flights are sorted by cheapest return flights first.

Deals found on 13/7

Showing 1-10 of 11 results
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?

Use this chart to determine the optimal time to book a return flight from Heathrow to Keflavik Intl. Price data was last updated on 11 July 2025.

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 81 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 £75). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in July is currently the most expensive (average of £289). 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 15 July 2025.

It’s typically best to fly out from London Heathrow Airport to Reykjavik Keflavik Intl Airport in the morning. Doing so could potentially save you 31% on the flight price compared to flying at midday, which is usually more expensive.

Weekly flight availability from London Heathrow Airport to Reykjavik Keflavik Intl Airport

Explore weekly flight availability from Heathrow to Keflavik Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 15 July 2025.

The most flights from LHR to KEF are scheduled on a Saturday (12 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (5 on average).

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 15 July 2025.
Check out reviews from past customers who have flown with SWISS, Scandinavian Airlines, andIcelandair 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.
SWISS
7.5
Good
1,657 reviews
Check prices

Comfort

7.4

Food

7.1

Boarding

7.6

Crew

8.2

Entertainment

6.8

Overall

7.5

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.
SWISS
7.5
Good
1,657 reviews
SWISS
7.5
Good
1,657 reviews
Check prices

Comfort

7.4

Food

7.1

Boarding

7.6

Crew

8.2

Entertainment

6.8

Overall

7.5

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.
Scandinavian Airlines
7.3
Good
1,423 reviews
SWISS
7.5
Good
1,657 reviews
Check prices

Comfort

7.4

Food

7.1

Boarding

7.6

Crew

8.2

Entertainment

6.8

Overall

7.5

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.
Icelandair
7.0
Good
515 reviews
SWISS
7.5
Good
1,657 reviews
Check prices

Comfort

7.4

Food

7.1

Boarding

7.6

Crew

8.2

Entertainment

6.8

Overall

7.5

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.
Lufthansa
6.8
Okay
7,205 reviews
SWISS
7.5
Good
1,657 reviews
Check prices

Comfort

7.4

Food

7.1

Boarding

7.6

Crew

8.2

Entertainment

6.8

Overall

7.5

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.
British Airways
6.6
Okay
7,134 reviews
SWISS
7.5
Good
1,657 reviews
Check prices

Comfort

7.4

Food

7.1

Boarding

7.6

Crew

8.2

Entertainment

6.8

Overall

7.5

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.

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.

  • 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 £154. Additional return tickets that might be worth considering are offered by British Airways and Scandinavian Airlines, with the lowest prices starting at £160 and £160, respectively. These flights start at 26% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from London Heathrow Airport to Reykjavik Keflavik Intl Airport one-way?

    The cheapet airlines for a one-way flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport are British Airways (£90), Scandinavian Airlines (£103), and Icelandair (£108).

  • 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 Emirates (100%), Icelandair (88%) and TAP AIR PORTUGAL (88%).

  • 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 £1,040, our data shows the cheapest flight currently is £110. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £137 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 £75). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in July is currently the most expensive (average of £289). 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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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 15 July 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£84Average£151FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
British AirwaysCheapest£116Average£194FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Scandinavian AirlinesCheapest£135Average£273FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£136Average£230FlexibilityNo cancel feeOn-time76%
Search Icelandair 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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