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$113+ 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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LHR
May 7 — May 141
Thu 5/7
Thu 5/14
1 adult, Economy
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Cheap 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 April 7, 2026.

This British Airways deal was found by Cheapflights users on 4/3. 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 4/2911:00 am
KEF
-
LHR
Nonstop3h 10m
British Airways
Sun 5/37:25 am
LHR
-
KEF
Nonstop3h 05m
British Airways
Deal found 4/3$205
This Iberia deal was found by Cheapflights users on 4/5. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2410:30 am
KEF
-
LHR
Nonstop3h 10m
British Airways
Sun 4/267:25 am
LHR
-
KEF
Nonstop3h 05m
British Airways
Deal found 4/5$212
This Iberia deal was found by Cheapflights users on 4/2. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2310:40 am
KEF
-
LHR
Nonstop3h 10m
British Airways
Thu 4/307:35 am
LHR
-
KEF
Nonstop3h 05m
British Airways
Deal found 4/2$222
This Expedia deal was found by Cheapflights users on 4/2. 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.
Fri 11/136:10 pm
KEF
-
LHR
Nonstop3h 00m
Multiple Airlines
Thu 11/198:35 pm
LHR
-
KEF
Nonstop3h 20m
Multiple Airlines
Deal found 4/2$247
This British Airways deal was found by Cheapflights users on 4/6. 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.
Sat 5/210:20 am
KEF
-
LHR
Nonstop3h 05m
British Airways
Sun 5/37:25 am
LHR
-
KEF
Nonstop3h 05m
British Airways
Deal found 4/6$249
This Trip.com deal was found by Cheapflights users on 4/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:35 pm
KEF
-
LHR
1 stop19h 00m
Multiple Airlines
Sun 4/267:25 am
LHR
-
KEF
Nonstop3h 05m
Multiple Airlines
Deal found 4/5$254

Find 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 April 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$205
(British Airways)

One-way from

$113
(KLM)

Popular in

July

Cheapest in

January

Average price

$484

Good round-trip deal

$337 or less

Good one-way deal

$261 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. 18% potential increase in price ($82 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in April 2026
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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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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 April 7, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Sat 5/2

10:20 am-2:25 pm

Nonstop3h 05m

London Heathrow

Sun 5/3

7:25 am-9:30 am

Nonstop3h 05m

$249

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 4/23

10:40 am-2:50 pm

Nonstop3h 10m

London Heathrow

Thu 4/30

7:35 am-9:40 am

Nonstop3h 05m

$288

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 9/3

7:15 pm-7:40 am

1 stop11h 25m

London Heathrow

Thu 9/17

8:55 pm-7:50 am

1 stop11h 55m

$291

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Wed 5/6

11:00 am-3:10 pm

Nonstop3h 10m

London Heathrow

Thu 5/14

7:35 am-9:40 am

Nonstop3h 05m

$307

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Tue 4/21

10:50 am-3:00 pm

Nonstop3h 10m

London Heathrow

Tue 4/28

7:50 am-9:55 am

Nonstop3h 05m

$324

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 10/2

8:50 am-8:55 pm

1 stop11h 05m

London Heathrow

Sun 10/4

8:40 am-6:15 pm

1 stop10h 35m

$343

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 5/15

7:55 am-2:35 pm

1 stop5h 40m

London Heathrow

Mon 5/18

7:50 pm-10:25 am

1 stop15h 35m

$378

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 5/21

7:15 pm-9:00 am

1 stop12h 45m

London Heathrow

Thu 5/28

8:55 pm-7:45 am

1 stop11h 50m

$390

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 5/8

10:30 am-2:40 pm

Nonstop3h 10m

London Heathrow

Sat 5/16

7:20 am-9:25 am

Nonstop3h 05m

$434

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 6/12

10:30 am-2:40 pm

Nonstop3h 10m

London Heathrow

Sun 6/14

7:25 am-9:30 am

Nonstop3h 05m

$450

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/6

Showing 1-10 of 20 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Reykjavik Keflavik Intl Airport-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Reykjavik Keflavik Intl Airport-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >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 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 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 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 April 7, 2026.

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.

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 April 7, 2026.
Peruse reviews from past customers who have flown with Icelandair 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
7.0
Good
631 reviews

Overall

7.0

Entertainment

6.9

Food

6.2

Boarding

7.2

Comfort

6.9

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Ásmundur,Apr 2026

CDG - KEF

The flight was uneventfull and ahead of schedule. The crew was attentive and the service good.
Icelandair
7.0
Good
631 reviews
Icelandair
7.0
Good
631 reviews

Overall

7.0

Entertainment

6.9

Food

6.2

Boarding

7.2

Comfort

6.9

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Ásmundur,Apr 2026

CDG - KEF

The flight was uneventfull and ahead of schedule. The crew was attentive and the service good.

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 and KLM fly from Reykjavik Keflavik Intl Airport to London Heathrow Airport in about 3h 05m. The time it takes to get you to your destination can typically vary by up to 8h 20m. Airlines will cover a distance of 1177 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Reykjavik Keflavik Intl Airport to London Heathrow Airport round-trip?

    Icelandair, at $266, was found to be the cheapest airline from Reykjavik Keflavik Intl Airport to London Heathrow Airport.. Icelandair is priced at 25% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airlines for a one-way flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport are British Airways ($112), Scandinavian Airlines ($122), and Icelandair ($211).

  • 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 Japan Airlines (100%), Qantas Airways (95%) or Qatar Airways (91%) 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 $223. While the most popular route (Reykjavik Keflavik Intl - London Heathrow) can be booked for $215 on average, our data indicates $867 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.

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
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Top airline flying from Keflavik Intl to Heathrow

Discover the top airline 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 April 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$266Average$386FlexibilityNo cancel feeOn-time76%

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