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$94+ Cheap flights from Keflavik Intl (KEF) to Heathrow (LHR)

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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LHR
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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Cheap flight deals from Keflavik Intl to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Keflavik Intl (KEF) to Heathrow (LHR). 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 November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$176
(British Airways)

One-way from

$94
(British Airways)

Popular in

April

Cheapest in

March

Average price

$375

Good round-trip deal

$663 or less

Good one-way deal

$227 or less
Provider with most accurate pricing for Reykjavik Keflavik Intl-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Reykjavik Keflavik Intl-London Heathrow flights.
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From Reykjavik Keflavik Intl to London Heathrow
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One-way flight from Reykjavik Keflavik Intl to London Heathrow
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Highest demand for flights based on searches. 6% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Reykjavik Keflavik Intl to London Heathrow.
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Price to beat on a one-way flight from Reykjavik Keflavik Intl to London Heathrow.
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Find flight deals from Keflavik Intl to Heathrow

Cheapest flights from Keflavik Intl to Heathrow
Explore the most affordable flight options available from Keflavik Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 3, 2025.

This British Airways deal was found by Cheapflights users on 11/1. 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 11/286:10 pmKEF - LHR
Nonstop3h 00mBritish Airways
Sun 11/307:20 amLHR - KEF
Nonstop3h 20mBritish Airways
Deal found 11/1$176
This British Airways deal was found by Cheapflights users on 11/1. 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 12/56:10 pmKEF - LHR
Nonstop3h 00mBritish Airways
Sun 12/77:20 amLHR - KEF
Nonstop3h 20mBritish Airways
Deal found 11/1$185
This British Airways deal was found by Cheapflights users on 11/1. 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 12/411:45 amKEF - LHR
Nonstop3h 10mBritish Airways
Sun 12/77:20 amLHR - KEF
Nonstop3h 20mBritish Airways
Deal found 11/1$193
This CheapOair deal was found by Cheapflights users on 11/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/217:30 pmKEF - LHR
1 stop14h 05mMultiple Airlines
Sun 1/48:35 pmLHR - KEF
Nonstop3h 20mMultiple Airlines
Deal found 11/1$233
This KLM deal was found by Cheapflights users on 11/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/511:25 amKEF - LHR
1 stop9h 25mKLM
Mon 12/810:00 amLHR - KEF
1 stop9h 05mKLM
Deal found 11/1$250
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1811:05 amKEF - LHR
2 stops22h 05mMultiple Airlines
Tue 11/258:35 pmLHR - KEF
Nonstop3h 20mMultiple Airlines
Deal found 11/1$254
This Expedia deal was found by Cheapflights users on 11/2. 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 11/2311:50 amKEF - LHR
Nonstop3h 10mBritish Airways
Sun 11/301:40 pmLHR - KEF
Nonstop3h 25mBritish Airways
Deal found 11/2$260
This British Airways deal was found by Cheapflights users on 11/1. 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.
Sun 12/215:55 pmKEF - LHR
Nonstop3h 00mBritish Airways
Sun 1/47:20 amLHR - KEF
Nonstop3h 20mBritish Airways
Deal found 11/1$261
This British Airways deal was found by Cheapflights users on 11/2. 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 11/2011:45 amKEF - LHR
Nonstop3h 10mBritish Airways
Sun 11/237:20 amLHR - KEF
Nonstop3h 20mBritish Airways
Deal found 11/2$268
This Travelocity deal was found by Cheapflights users on 11/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:10 pmKEF - LHR
Nonstop3h 00mMultiple Airlines
Mon 11/178:35 pmLHR - KEF
Nonstop3h 20mMultiple Airlines
Deal found 11/2$274
This Mytrip deal was found by Cheapflights users on 11/1. 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.
Sat 11/294:20 pmKEF - LHR
Nonstop3h 10mIcelandair
Sat 12/68:35 pmLHR - KEF
Nonstop3h 20mIcelandair
Deal found 11/1$281

Cheapflights Fare Finder

 
Customize your flight search to find flights from Keflavik Intl to Heathrow 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 November 3, 2025.
Use the filters below to find and compare flights from Reykjavik Keflavik Intl Airport to London Heathrow Airport that are best for you.

Fly from

Keflavik Intl

Fly to

Heathrow

Route

Depart

Return

Price

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 11/28

6:10 pm-9:10 pm

Nonstop3h 00m

London Heathrow

Sun 11/30

7:20 am-10:40 am

Nonstop3h 20m

$176

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 12/5

6:10 pm-9:10 pm

Nonstop3h 00m

London Heathrow

Mon 12/8

7:35 am-10:55 am

Nonstop3h 20m

$185

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 1/23

6:10 pm-9:10 pm

Nonstop3h 00m

London Heathrow

Sun 1/25

1:40 pm-5:05 pm

Nonstop3h 25m

$189

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 1/22

11:30 am-9:40 pm

1 stop10h 10m

London Heathrow

Thu 1/29

8:35 pm-11:55 pm

Nonstop3h 20m

$192

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 1/23

6:10 pm-9:10 pm

Nonstop3h 00m

London Heathrow

Thu 1/29

7:25 am-10:45 am

Nonstop3h 20m

$193

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Sat 1/10

11:55 am-3:05 pm

Nonstop3h 10m

London Heathrow

Wed 1/14

7:30 am-10:50 am

Nonstop3h 20m

$194

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 1/22

11:45 am-2:55 pm

Nonstop3h 10m

London Heathrow

Thu 1/29

7:25 am-10:45 am

Nonstop3h 20m

$196

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 1/30

11:50 am-3:00 pm

Nonstop3h 10m

London Heathrow

Tue 2/3

7:35 am-10:55 am

Nonstop3h 20m

$211

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 1/8

11:45 am-2:55 pm

Nonstop3h 10m

London Heathrow

Mon 1/12

7:35 am-10:55 am

Nonstop3h 20m

$230

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 1/8

8:00 pm-7:40 am

1 stop11h 40m

London Heathrow

Mon 1/12

10:00 am-7:05 pm

1 stop9h 05m

$236

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 21 results
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Compare providers for flights from Keflavik Intl to Heathrow

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 Keflavik Intl to Heathrow in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 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 Reykjavik Keflavik Intl Airport-London Heathrow Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Reykjavik Keflavik Intl Airport-London Heathrow Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Reykjavik Keflavik Intl Airport-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Reykjavik Keflavik Intl Airport-London Heathrow 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 Reykjavik Keflavik Intl Airport-London Heathrow 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 Keflavik Intl to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Keflavik Intl 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 Reykjavik Keflavik Intl Airport to London Heathrow Airport

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

Currently, December is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport (average of $177). Flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport in September is currently the most expensive (average of $360). 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 KEF to LHR?

Find hourly flight availability from Keflavik Intl to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 3, 2025.

When flying from Reykjavik Keflavik Intl Airport to London Heathrow 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 Reykjavik Keflavik Intl Airport to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated November 3, 2025.
Peruse reviews from past customers who have flown with Icelandair and British Airways from Reykjavik Keflavik Intl Airport to London Heathrow 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.
Icelandair
7.1
Good
568 reviews

Overall

7.1

Crew

8.1

Boarding

7.2

Food

6.2

Comfort

7.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Dmitry,Oct 2025

KEF - EWR

It was a nice experience, the plane was clean and the crew was friendly. The boarding process went smoothly and there were no delays.
Icelandair
7.1
Good
568 reviews
Icelandair
7.1
Good
568 reviews

Overall

7.1

Crew

8.1

Boarding

7.2

Food

6.2

Comfort

7.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Dmitry,Oct 2025

KEF - EWR

It was a nice experience, the plane was clean and the crew was friendly. The boarding process went smoothly and there were no delays.
British Airways
6.7
Okay
7,494 reviews
Icelandair
7.1
Good
568 reviews

Overall

7.1

Crew

8.1

Boarding

7.2

Food

6.2

Comfort

7.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Dmitry,Oct 2025

KEF - EWR

It was a nice experience, the plane was clean and the crew was friendly. The boarding process went smoothly and there were no delays.

Related info for your journey

Find useful and relevant information for your journey from Keflavik Intl to Heathrow. 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 Reykjavik Keflavik Intl Airport to London Heathrow Airport?

    Airlines like British Airways fly from Reykjavik Keflavik Intl Airport to London Heathrow Airport in about 3h. The time it takes to get you to your destination is usually consistent. Airlines will cover a distance of 1177 mi. Most flights are nonstop.

  • What are the cheapest airlines flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport round-trip?

    British Airways, at $180, was found to be the cheapest airline from Reykjavik Keflavik Intl Airport to London Heathrow Airport. An alternate airline flying to your destination would be Icelandair. British Airways is priced at 49% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from Reykjavik Keflavik Intl Airport to London Heathrow Airport?

    No one likes to see their flight delayed. When booking a flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport consider choosing Turkish Airlines (92%), Icelandair (87%) or Air India (87%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Reykjavik Keflavik Intl Airport to London Heathrow Airport?

    Looking at all options, your cheapest flight can be booked for $130. While the most popular route (Reykjavik Keflavik Intl - London Heathrow) can be booked for $332 on average, our data indicates $630 when flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport.

  • Can I find deals for flights from Keflavik Intl to Heathrow that include hotel bookings?

    Yes. In addition to deals on Keflavik Intl to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Keflavik Intl to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Keflavik Intl to Heathrow.

  • Can I find deals for business class flights from Keflavik Intl to Heathrow?

    Yes. Cheapflights offers flight deals from Keflavik Intl to Heathrow 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 Reykjavik Keflavik Intl Airport to London Heathrow Airport?

    Currently, December is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport (average of $177). Flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport in September is currently the most expensive (average of $360). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
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Top 2 airlines flying from Keflavik Intl to Heathrow

Discover the top 2 airlines that operate flights from Keflavik Intl to Heathrow. 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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$180Average$395FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$217Average$333FlexibilityNo cancel feeOn-time76%

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