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Keflavik Intl

$98+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
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 November, booked 53 days in advance, depart on a Monday or Friday and return on a Thursday

Cheap 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 March 11, 2026.

This Booking.com deal was found by Cheapflights users on 3/9. 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.
Mon 4/207:40 am
LHR
-
KEF
Nonstop3h 05m
British Airways
Wed 4/2911:00 am
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 3/9$177
This British Airways deal was found by Cheapflights users on 3/10. 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.
Tue 4/217:50 am
LHR
-
KEF
Nonstop3h 05m
British Airways
Tue 4/2810:50 am
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 3/10$192
This Booking.com deal was found by Cheapflights users on 3/8. 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.
Tue 5/129:25 pm
LHR
-
KEF
Nonstop3h 10m
Icelandair
Fri 5/154:10 pm
KEF
-
LHR
Nonstop3h 10m
Icelandair
Deal found 3/8$194
This Expedia deal was found by Cheapflights users on 3/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/197:25 am
LHR
-
KEF
Nonstop3h 05m
British Airways
Tue 4/2810:50 am
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 3/9$197
This FlightHub deal was found by Cheapflights users on 3/10. 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.
Sat 5/29:25 pm
LHR
-
KEF
Nonstop3h 10m
Icelandair
Thu 5/74:10 pm
KEF
-
LHR
Nonstop3h 10m
Icelandair
Deal found 3/10$198
This British Airways deal was found by Cheapflights users on 3/10. 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.
Tue 4/147:50 am
LHR
-
KEF
Nonstop3h 05m
British Airways
Tue 4/2110:50 am
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 3/10$200
This British Airways deal was found by Cheapflights users on 3/11. 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 4/207:40 am
LHR
-
KEF
Nonstop3h 05m
British Airways
Thu 4/2310:40 am
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 3/11$202
This British Airways deal was found by Cheapflights users on 3/7. 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.
Tue 4/287:50 am
LHR
-
KEF
Nonstop3h 05m
British Airways
Thu 5/710:40 am
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 3/7$207
This British Airways deal was found by Cheapflights users on 3/10. 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 4/207:40 am
LHR
-
KEF
Nonstop3h 05m
British Airways
Fri 4/2410:30 am
KEF
-
LHR
Nonstop3h 10m
British Airways
Deal found 3/10$208
This Booking.com deal was found by Cheapflights users on 3/8. 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.
Mon 5/119:25 pm
LHR
-
KEF
Nonstop3h 10m
Icelandair
Fri 5/154:10 pm
KEF
-
LHR
Nonstop3h 10m
Icelandair
Deal found 3/8$209
This Booking.com deal was found by Cheapflights users on 3/7. 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 4/229:25 pm
LHR
-
KEF
Nonstop3h 10m
Icelandair
Tue 4/287:40 am
KEF
-
LHR
Nonstop3h 15m
Icelandair
Deal found 3/7$211

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 March 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$177
(Booking.com)

One-way from

$98
(Mytrip)

Popular in

August

Cheapest in

January

Average price

$233

Good round-trip deal

$353 or less

Good one-way deal

$370 or less
Provider with most accurate pricing for London Heathrow-Reykjavik Keflavik Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Heathrow-Reykjavik Keflavik Intl flights.
Search Deals
From London Heathrow to Reykjavik Keflavik Intl
Search Deals
One-way flight from London Heathrow to Reykjavik Keflavik Intl
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($96 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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

 
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 March 11, 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 round-trip
Quickest round-trip

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 4/21

7:50 am-9:55 am

Nonstop3h 05m

Reykjavik Keflavik Intl

Tue 4/28

10:50 am-3:00 pm

Nonstop3h 10m

$182

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sat 5/2

7:20 am-9:25 am

Nonstop3h 05m

Reykjavik Keflavik Intl

Thu 5/7

10:40 am-2:50 pm

Nonstop3h 10m

$256

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 5/8

7:50 pm-8:45 am

1 stop13h 55m

Reykjavik Keflavik Intl

Mon 5/11

11:15 am-9:40 pm

2 stops9h 25m

$294

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 5/5

9:05 pm-10:25 am

2 stops14h 20m

Reykjavik Keflavik Intl

Sat 5/9

5:10 pm-9:20 am

1 stop15h 10m

$297

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sat 5/2

6:40 am-4:20 pm

2 stops10h 40m

Reykjavik Keflavik Intl

Thu 5/7

11:15 am-9:35 pm

1 stop9h 20m

$298

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 5/21

7:50 pm-7:05 am

1 stop12h 15m

Reykjavik Keflavik Intl

Sun 5/24

10:40 am-9:40 pm

2 stops10h 00m

$362

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 4/29

7:05 am-4:45 pm

2 stops10h 40m

Reykjavik Keflavik Intl

Mon 5/4

10:30 am-9:35 pm

2 stops10h 05m

$405

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 5/24

6:40 am-4:15 pm

2 stops10h 35m

Reykjavik Keflavik Intl

Fri 5/29

7:55 am-9:20 pm

2 stops12h 25m

$460

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sat 5/30

3:35 pm-9:40 am

2 stops19h 05m

Reykjavik Keflavik Intl

Fri 6/12

5:05 pm-9:20 am

1 stop15h 15m

$462

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 9/6

9:25 pm-11:35 pm

Nonstop3h 10m

Reykjavik Keflavik Intl

Sun 9/13

7:50 am-2:35 pm

1 stop5h 45m

$490

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Heathrow to Keflavik Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Keflavik Intl in March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London Heathrow Airport-Reykjavik Keflavik Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Reykjavik Keflavik Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Reykjavik Keflavik Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-Reykjavik Keflavik Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Reykjavik Keflavik Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 March 6, 2026.

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 53 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of $76). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of $320). 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 March 11, 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 to fly round-trip 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 March 11, 2026.
Read through reviews of airlines operating flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport, such as Icelandair and British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Icelandair
7.1
Good
619 reviews

Boarding

7.2

Overall

7.1

Entertainment

7.0

Comfort

7.0

Food

6.2

Crew

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

ZRH - KEF

Almost 7 hr flight and no ear buds provided and no food. I would choose a different airline next time for that reason.
Icelandair
7.1
Good
619 reviews
Icelandair
7.1
Good
619 reviews

Boarding

7.2

Overall

7.1

Entertainment

7.0

Comfort

7.0

Food

6.2

Crew

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

ZRH - KEF

Almost 7 hr flight and no ear buds provided and no food. I would choose a different airline next time for that reason.
British Airways
6.7
Okay
7,781 reviews
Icelandair
7.1
Good
619 reviews

Boarding

7.2

Overall

7.1

Entertainment

7.0

Comfort

7.0

Food

6.2

Crew

8.0

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

ZRH - KEF

Almost 7 hr flight and no ear buds provided and no food. I would choose a different airline next time for that reason.

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?

    British Airways and Icelandair can get you from London Heathrow Airport to Reykjavik Keflavik Intl Airport in just under 3h 05m. Your travel time will be generally consistent. The distance between London Heathrow Airport and Reykjavik Keflavik Intl Airport is about 1177 mi. Generally, flights for this route are nonstop.

  • 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 $169. Another airline that can offer you cheap pricing is Icelandair. British Airways is 43% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 (93%), Icelandair (90%) and Emirates (90%).

  • 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 $232. While the most popular route (London Heathrow - Reykjavik Keflavik Intl) can be booked for $223 on average, our data indicates $1,206 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of $76). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of $320). 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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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

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 March 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$169Average$472FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$202Average$380FlexibilityNo cancel feeOn-time76%

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