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Keflavik Intl

$121+ Cheap flights from Heathrow (LHR) to Keflavik Intl (KEF)

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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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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 Friday and return on a Thursday

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 July 29, 2025.

Round-trip from

$220
(Icelandair)

One-way from

$121
(Scandinavian Airlines)

Popular in

July

Cheapest in

January

Average price

$415

Good round-trip deal

$311 or less

Good one-way deal

$352 or less
From London Heathrow to Reykjavik Keflavik Intl
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One-way flight from London Heathrow to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 21% potential increase in price ($79 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($12 potential savings vs. average RT 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 July 29, 2025.

This British Airways deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/247:35 amLHR - KEF
Nonstop3h 20mBritish Airways
Fri 11/286:10 pmKEF - LHR
Nonstop3h 00mBritish Airways
Deal found 7/28$197
This FlightHub deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/208:35 pmLHR - KEF
Nonstop3h 20mIcelandair
Sun 11/237:35 amKEF - LHR
Nonstop3h 15mIcelandair
Deal found 7/29$202
This Booking.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/195:30 pmLHR - KEF
1 stop17h 15mScandinavian Airlines
Thu 11/2711:30 amKEF - LHR
1 stop7h 20mScandinavian Airlines
Deal found 7/28$214
This Lufthansa deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:50 pmLHR - KEF
1 stop7h 20mLufthansa
Sun 10/264:45 pmKEF - LHR
1 stop15h 00mLufthansa
Deal found 7/27$224
This SWISS deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:00 amLHR - KEF
1 stop27h 35mSWISS
Tue 9/234:10 pmKEF - LHR
1 stop24h 40mSWISS
Deal found 7/27$245

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated July 29, 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

Sun 10/26

8:35 pm-11:55 pm

Nonstop3h 20m

Reykjavik Keflavik Intl

Wed 11/5

7:35 am-10:50 am

Nonstop3h 15m

$220

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 10/23

5:50 pm-12:10 am

1 stop7h 20m

Reykjavik Keflavik Intl

Sun 10/26

4:45 pm-7:45 am

1 stop15h 00m

$224

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 8/11

7:50 pm-7:20 am

1 stop12h 30m

Reykjavik Keflavik Intl

Wed 8/13

5:40 pm-9:20 am

1 stop14h 40m

$234

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 9/8

6:00 am-8:35 am

1 stop27h 35m

Reykjavik Keflavik Intl

Tue 9/23

4:10 pm-5:50 pm

1 stop24h 40m

$245

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 9/4

7:35 am-9:40 am

Nonstop3h 05m

Reykjavik Keflavik Intl

Mon 9/8

5:10 pm-4:00 pm

1 stop21h 50m

$294

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 10/7

9:05 am-11:20 pm

1 stop15h 15m

Reykjavik Keflavik Intl

Fri 10/10

12:10 am-2:20 pm

1 stop13h 10m

$305

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 8/14

7:50 pm-7:05 am

1 stop12h 15m

$121

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 9/10

7:55 am-10:00 am

Nonstop3h 05m

$128

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 10/7

8:20 am-11:35 pm

1 stop16h 15m

$153

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 8/27

9:25 pm-11:35 pm

Nonstop3h 10m

$171

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 15 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 round-trip 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 round-trip flight from Heathrow to Keflavik Intl. Price data was last updated on July 25, 2025.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport, you should look to book at least 81 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

Currently, November is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of $328). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $653). 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 July 29, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 39% on flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport by exploring options for tickets in the afternoon.

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 July 29, 2025.

The most flights from LHR to KEF are scheduled on a Monday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

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 July 29, 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport, such as KLM, Austrian Airlines, and SWISS. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,383 reviews

Boarding

7.8

Overall

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,383 reviews
KLM
7.8
Good
1,383 reviews

Boarding

7.8

Overall

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Austrian Airlines
7.6
Good
821 reviews
KLM
7.8
Good
1,383 reviews

Boarding

7.8

Overall

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
SWISS
7.5
Good
1,683 reviews
KLM
7.8
Good
1,383 reviews

Boarding

7.8

Overall

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Scandinavian Airlines
7.3
Good
1,449 reviews
KLM
7.8
Good
1,383 reviews

Boarding

7.8

Overall

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Icelandair
7.0
Good
521 reviews
KLM
7.8
Good
1,383 reviews

Boarding

7.8

Overall

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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?

    Cheapflights users have booked flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport round-trip from $220. Other airlines that can offer you cheap pricing are Lufthansa, from $224, and Scandinavian Airlines, from $234. Icelandair is 22% cheaper than the average price of flights available within the next 90 days to this destination.

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

    $121 is the cheapest one-way deal found within the past few days, from Scandinavian Airlines. You may also be able to find cheap deals on British Airways and Icelandair, with prices starting from $128 and $171, respectively.

  • 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?

    Looking at all options, your cheapest flight can be booked for $203. While the most popular route (London Heathrow - Reykjavik Keflavik Intl) can be booked for $240 on average our data indicates $1,117 when flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport.

  • 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 vacation 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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of $328). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $653). 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

Traveling to a place near Reykjavik Keflavik Intl Airport?

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

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Top 2 airlines flying from Heathrow to Keflavik Intl

Discover the top 2 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 2,558,603 searches. Data last updated July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$153Average$252FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$156Average$301FlexibilityNo cancel feeOn-time76%

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