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$120+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LHR
Jun 19 — Jun 261
Fri 6/19
Fri 6/26
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 May 20, 2026.

This Super.com deal was found by Cheapflights users on 5/19. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/55:45 pm
KEF
-
LHR
1 stop14h 35m
Scandinavian Airlines
Tue 6/97:50 pm
LHR
-
KEF
1 stop13h 00m
Scandinavian Airlines
Deal found 5/19$248
This Booking.com deal was found by Cheapflights users on 5/19. 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.
Thu 6/45:35 pm
KEF
-
LHR
1 stop21h 25m
Multiple Airlines
Mon 6/89:25 pm
LHR
-
KEF
Nonstop3h 10m
Multiple Airlines
Deal found 5/19$258
This Kiwi.com deal was found by Cheapflights users on 5/18. 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.
Mon 6/112:20 am
KEF
-
LHR
1 stop6h 20m
Lufthansa
Thu 6/49:00 am
LHR
-
KEF
1 stop16h 10m
Lufthansa
Deal found 5/18$262
This Booking.com deal was found by Cheapflights users on 5/19. 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.
Thu 6/45:35 pm
KEF
-
LHR
1 stop21h 25m
Scandinavian Airlines
Mon 6/85:30 pm
LHR
-
KEF
1 stop17h 55m
Scandinavian Airlines
Deal found 5/19$263
This Kiwi.com deal was found by Cheapflights users on 5/18. 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.
Wed 6/35:35 pm
KEF
-
LHR
1 stop14h 45m
Scandinavian Airlines
Thu 6/47:50 pm
LHR
-
KEF
1 stop12h 15m
Scandinavian Airlines
Deal found 5/18$277
This Travelocity deal was found by Cheapflights users on 5/16. 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.
Mon 6/15:05 pm
KEF
-
LHR
1 stop21h 55m
Scandinavian Airlines
Fri 6/57:50 pm
LHR
-
KEF
1 stop13h 55m
Scandinavian Airlines
Deal found 5/16$281
This Mytrip deal was found by Cheapflights users on 5/17. 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.
Mon 10/267:35 am
KEF
-
LHR
Nonstop3h 15m
Icelandair
Tue 11/38:35 pm
LHR
-
KEF
Nonstop3h 20m
Icelandair
Deal found 5/17$287
This British Airways deal was found by Cheapflights users on 5/19. 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 12/311:45 am
KEF
-
LHR
Nonstop3h 10m
British Airways
Fri 1/151:50 pm
LHR
-
KEF
Nonstop3h 25m
British Airways
Deal found 5/19$288
This Booking.com deal was found by Cheapflights users on 5/17. 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 10/266:05 pm
KEF
-
LHR
1 stop21h 55m
Multiple Airlines
Tue 11/38:35 pm
LHR
-
KEF
Nonstop3h 20m
Multiple Airlines
Deal found 5/17$295
This Mytrip deal was found by Cheapflights users on 5/19. 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.
Mon 9/147:40 am
KEF
-
LHR
Nonstop3h 15m
Icelandair
Thu 9/179:25 pm
LHR
-
KEF
Nonstop3h 10m
Icelandair
Deal found 5/19$299

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 May 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$248
(Super.com)

One-way from

$120
(Super.com)

Popular in

September

Cheapest in

January

Average price

$278

Good round-trip deal

$1,137 or less

Good one-way deal

$278 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
Search Deals
One-way flight from Reykjavik Keflavik Intl to London Heathrow
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Reykjavik Keflavik Intl to London Heathrow.
Search Deals
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 May 20, 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

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 9/10

5:05 pm-9:20 am

1 stop15h 15m

London Heathrow

Mon 9/14

7:50 pm-10:25 am

1 stop15h 35m

$379

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 8/14

8:10 am-9:20 pm

1 stop12h 10m

London Heathrow

Thu 8/20

7:50 pm-7:05 am

1 stop12h 15m

$413

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Mon 8/17

6:10 pm-9:35 am

1 stop14h 25m

London Heathrow

Thu 8/20

7:50 pm-7:05 am

1 stop12h 15m

$450

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 6/5

7:55 am-4:25 pm

1 stop7h 30m

London Heathrow

Thu 6/11

7:50 pm-7:05 am

1 stop12h 15m

$451
Quickest round-trip

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Sat 6/6

10:20 am-2:25 pm

Nonstop3h 05m

London Heathrow

Mon 6/8

7:40 am-9:45 am

Nonstop3h 05m

$468

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Wed 7/8

11:00 am-3:10 pm

Nonstop3h 10m

London Heathrow

Thu 7/9

7:35 am-9:40 am

Nonstop3h 05m

$470

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Sat 7/4

4:10 pm-8:20 pm

Nonstop3h 10m

London Heathrow

Sun 9/13

9:25 pm-11:35 pm

Nonstop3h 10m

$474

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Wed 8/12

11:15 am-6:50 pm

1 stop6h 35m

London Heathrow

Mon 8/24

7:50 pm-5:20 pm

1 stop22h 30m

$486

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Wed 10/28

11:30 am-8:50 pm

2 stops9h 20m

London Heathrow

Mon 11/2

5:05 pm-11:25 am

2 stops18h 20m

$487

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Wed 8/12

11:15 am-2:35 pm

1 stop26h 20m

London Heathrow

Wed 8/26

5:30 pm-10:25 am

1 stop17h 55m

$515

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/20

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3
  • 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 May 20, 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.

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 May 20, 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
656 reviews

Crew

8.0

Overall

7.0

Comfort

6.9

Food

6.2

Boarding

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Bruce,Mar 2026

BCN - KEF

The airline is charging everything. Drink, meal and ear plug for watching entertainment. This was 4 hours 40 minutes flight.
Icelandair
7.0
Good
656 reviews
Icelandair
7.0
Good
656 reviews

Crew

8.0

Overall

7.0

Comfort

6.9

Food

6.2

Boarding

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Bruce,Mar 2026

BCN - KEF

The airline is charging everything. Drink, meal and ear plug for watching entertainment. This was 4 hours 40 minutes flight.

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 Scandinavian Airlines and British Airways 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 12h 10m. 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 $244, was found to be the cheapest airline from Reykjavik Keflavik Intl Airport to London Heathrow Airport.. Icelandair is priced at 35% 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 Japan Airlines (88%), Turkish Airlines (86%) or Icelandair (86%) 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 $170. While the most popular route (Reykjavik Keflavik Intl - London Heathrow) can be booked for $258 on average, our data indicates $1,043 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
Ilford
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Harrow
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Browse thousands of different options on Cheapflights for your next trip

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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 May 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$244Average$410FlexibilityNo cancel feeOn-time76%

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