HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Keflavik Intl

$76+ 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Heathrow to Keflavik Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from London Heathrow to Reykjavik Keflavik Intl are usually found in January or November, booked 13 days in advance, depart on a Friday or Sunday and return on a Monday

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 December 12, 2025.

This British Airways deal was found by Cheapflights users on 12/10. 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.
Wed 12/317:30 amLHR - KEF
Nonstop3h 20mBritish Airways
Wed 1/1411:50 amKEF - LHR
Nonstop3h 10mBritish Airways
Deal found 12/10$266
This British Airways deal was found by Cheapflights users on 12/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:30 amLHR - KEF
Nonstop3h 20mBritish Airways
Sun 12/145:55 pmKEF - LHR
Nonstop3h 00mBritish Airways
Deal found 12/9$349
This Expedia deal was found by Cheapflights users on 12/9. 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.
Wed 12/104:40 pmLHR - KEF
1 stop21h 35mLufthansa
Tue 1/133:20 pmKEF - LHR
1 stop7h 00mLufthansa
Deal found 12/9$355
This British Airways deal was found by Cheapflights users on 12/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:25 amLHR - KEF
Nonstop3h 20mBritish Airways
Sun 12/145:55 pmKEF - LHR
Nonstop3h 00mBritish Airways
Deal found 12/9$356
This British Airways deal was found by Cheapflights users on 12/10. 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.
Wed 12/317:30 amLHR - KEF
Nonstop3h 20mBritish Airways
Mon 1/1211:50 amKEF - LHR
Nonstop3h 10mBritish Airways
Deal found 12/10$362
This Mytrip deal was found by Cheapflights users on 12/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/108:35 pmLHR - KEF
Nonstop3h 20mIcelandair
Tue 1/137:35 amKEF - LHR
Nonstop3h 15mIcelandair
Deal found 12/9$368
This Mytrip deal was found by Cheapflights users on 12/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/108:35 pmLHR - KEF
Nonstop3h 20mIcelandair
Sat 12/134:20 pmKEF - LHR
Nonstop3h 10mIcelandair
Deal found 12/9$370
This Scandinavian Airlines deal was found by Cheapflights users on 12/11. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/133:35 pmLHR - KEF
1 stop18h 55mScandinavian Airlines
Wed 12/1711:30 amKEF - LHR
2 stops10h 05mScandinavian Airlines
Deal found 12/11$372
This British Airways deal was found by Cheapflights users on 12/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:35 amLHR - KEF
Nonstop3h 20mBritish Airways
Wed 1/1411:50 amKEF - LHR
Nonstop3h 10mBritish Airways
Deal found 12/9$393
This British Airways deal was found by Cheapflights users on 12/11. 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.
Fri 12/121:50 pmLHR - KEF
Nonstop3h 25mBritish Airways
Mon 12/1511:50 amKEF - LHR
Nonstop3h 10mBritish Airways
Deal found 12/11$396
This British Airways deal was found by Cheapflights users on 12/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:30 amLHR - KEF
Nonstop3h 20mBritish Airways
Fri 12/126:10 pmKEF - LHR
Nonstop3h 00mBritish Airways
Deal found 12/9$401

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$145
(Mytrip)

One-way from

$76
(Mytrip)

Popular in

July

Cheapest in

January

Average price

$272

Good round-trip deal

$317 or less

Good one-way deal

$239 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. 21% potential increase in price ($75 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 12, 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

Mon 1/5

7:35 am-10:55 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Fri 1/16

6:10 pm-9:10 pm

Nonstop3h 00m

$180

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 1/6

7:35 am-10:55 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Thu 1/15

11:45 am-2:55 pm

Nonstop3h 10m

$180

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 1/6

7:35 am-10:55 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Tue 1/13

11:50 am-3:00 pm

Nonstop3h 10m

$180

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 1/4

7:20 am-10:40 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Thu 1/15

11:45 am-2:55 pm

Nonstop3h 10m

$188

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 1/4

7:20 am-10:40 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Wed 1/14

11:50 am-3:00 pm

Nonstop3h 10m

$188

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 2/22

7:20 am-10:40 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Sat 2/28

11:55 am-3:05 pm

Nonstop3h 10m

$199

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 3/10

7:35 am-10:55 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Sun 3/15

5:55 pm-8:55 pm

Nonstop3h 00m

$204

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 3/3

7:35 am-10:55 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Sun 3/8

5:55 pm-8:55 pm

Nonstop3h 00m

$236

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 1/15

7:25 am-10:45 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Sun 1/18

11:50 am-3:00 pm

Nonstop3h 10m

$239

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 1/26

10:00 am-7:05 pm

1 stop9h 05m

Reykjavik Keflavik Intl

Sat 1/31

8:05 pm-12:05 pm

1 stop16h 00m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 19 results
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 December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
Trip.comPrice Accuracy2 starsTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London Heathrow Airport-Reykjavik Keflavik Intl Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 5, 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 13 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 $114). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in July is currently the most expensive (average of $269). 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 December 12, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 68% on flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport by exploring options for tickets in the afternoon.

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 December 12, 2025.
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
7.0
Good
589 reviews

Entertainment

7.0

Food

6.2

Boarding

7.2

Comfort

6.9

Crew

8.0

Overall

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.
Icelandair
7.0
Good
589 reviews
Icelandair
7.0
Good
589 reviews

Entertainment

7.0

Food

6.2

Boarding

7.2

Comfort

6.9

Crew

8.0

Overall

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.
British Airways
6.7
Okay
7,571 reviews
Icelandair
7.0
Good
589 reviews

Entertainment

7.0

Food

6.2

Boarding

7.2

Comfort

6.9

Crew

8.0

Overall

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.

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 can get you from London Heathrow Airport to Reykjavik Keflavik Intl Airport in just under 3h 20m. 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 $153. Another airline that can offer you cheap pricing is Icelandair. British Airways is 46% 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 American Airlines (92%), Turkish Airlines (90%) and Qantas Airways (89%).

  • 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 $119. While the most popular route (London Heathrow - Reykjavik Keflavik Intl) can be booked for $163 on average, our data indicates $634 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 $114). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in July is currently the most expensive (average of $269). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$153Average$252FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$184Average$351FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.