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Keflavik Intl

$117+ 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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
Jul 19 — Jul 261
Sat 7/19
Sat 7/26
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 February, booked 81 days in advance, depart on a Thursday or Friday and return on a Tuesday

Cheap 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 July 14, 2025.

Round-trip from

$234
(FlightHub)

One-way from

$133
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$414

Good round-trip deal

$320 or less

Good one-way deal

$257 or less
From London Heathrow to Reykjavik Keflavik Intl
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One-way flight from London Heathrow to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 21% potential increase in price ($79 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from London Heathrow to Reykjavik Keflavik Intl.
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Price to beat on a one-way flight from London Heathrow to Reykjavik Keflavik Intl.
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Find 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 July 14, 2025.

This deal was found by Cheapflights users on 7/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/98:35 pmLHR - KEF
Nonstop3h 20mIcelandair
Fri 12/127:35 amKEF - LHR
Nonstop3h 15mIcelandair
Deal found 7/14$207
This British Airways deal was found by Cheapflights users on 7/14. 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 11/247:35 amLHR - KEF
Nonstop3h 20mBritish Airways
Fri 11/286:10 pmKEF - LHR
Nonstop3h 00mBritish Airways
Deal found 7/14$215
This Scandinavian Airlines deal was found by Cheapflights users on 7/14. 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.
Wed 11/57:50 pmLHR - KEF
1 stop14h 55mScandinavian Airlines
Mon 11/101:00 pmKEF - LHR
1 stop8h 35mScandinavian Airlines
Deal found 7/14$216
This Kiwi.com deal was found by Cheapflights users on 7/13. 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 12/87:35 amLHR - KEF
Nonstop3h 20mMultiple Airlines
Wed 12/1011:30 amKEF - LHR
1 stop6h 10mMultiple Airlines
Deal found 7/13$231
This SWISS deal was found by Cheapflights users on 7/14. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/158:05 pmLHR - KEF
1 stop13h 30mSWISS
Tue 9/234:10 pmKEF - LHR
1 stop14h 45mSWISS
Deal found 7/14$244
This Lufthansa deal was found by Cheapflights users on 7/13. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:35 amLHR - KEF
1 stop7h 40mLufthansa
Tue 12/164:45 pmKEF - LHR
1 stop16h 00mLufthansa
Deal found 7/13$247

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 July 14, 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

Tue 12/9

8:35 pm-11:55 pm

Nonstop3h 20m

Reykjavik Keflavik Intl

Fri 12/12

7:35 am-10:50 am

Nonstop3h 15m

$207

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 11/24

7:35 am-10:55 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Fri 11/28

6:10 pm-9:10 pm

Nonstop3h 00m

$215

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 11/5

7:50 pm-10:45 am

1 stop14h 55m

Reykjavik Keflavik Intl

Mon 11/10

1:00 pm-9:35 pm

1 stop8h 35m

$216

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 12/8

7:35 am-10:55 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Wed 12/10

11:30 am-5:40 pm

1 stop6h 10m

$231

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 9/15

8:05 pm-8:35 am

1 stop13h 30m

Reykjavik Keflavik Intl

Tue 9/23

4:10 pm-7:55 am

1 stop14h 45m

$244

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 12/11

6:35 am-2:15 pm

1 stop7h 40m

Reykjavik Keflavik Intl

Tue 12/16

4:45 pm-8:45 am

1 stop16h 00m

$247

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 11/9

6:50 am-6:40 pm

1 stop11h 50m

$117

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 10/16

3:35 pm-7:05 am

1 stop16h 30m

$138

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sat 8/30

9:25 pm-11:35 pm

Nonstop3h 10m

$145

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 8/29

7:35 am-9:40 am

Nonstop3h 05m

$148

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/13

Showing 1-10 of 12 results
1
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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 July 11, 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 81 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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of $328). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $652). 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 July 14, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 39% on flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport by exploring options for tickets in the afternoon.

Weekly flight availability from London Heathrow Airport to Reykjavik Keflavik Intl Airport

Explore weekly flight availability from Heathrow to Keflavik Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 14, 2025.

The most flights from LHR to KEF are scheduled on a Saturday (12 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (5 on average).

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 July 14, 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport, such as Austrian Airlines, SWISS, and Scandinavian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
813 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Comfort

7.3

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Austrian Airlines
7.6
Good
813 reviews
Austrian Airlines
7.6
Good
813 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Comfort

7.3

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
SWISS
7.5
Good
1,657 reviews
Austrian Airlines
7.6
Good
813 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Comfort

7.3

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Scandinavian Airlines
7.3
Good
1,423 reviews
Austrian Airlines
7.6
Good
813 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Comfort

7.3

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Icelandair
7.0
Good
515 reviews
Austrian Airlines
7.6
Good
813 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Comfort

7.3

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Lufthansa
6.8
Okay
7,205 reviews
Austrian Airlines
7.6
Good
813 reviews

Food

6.8

Entertainment

6.8

Crew

8.1

Comfort

7.3

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

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.

  • 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 $234. Other airlines that can offer you cheap pricing are Scandinavian Airlines, from $236, and SWISS, from $244. Icelandair is 17% cheaper than the average price of flights available within the next 90 days to this destination.

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

    $145 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on British Airways and Lufthansa, with prices starting from $146 and $159, respectively.

  • 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 Emirates (100%), Icelandair (88%) and TAP AIR PORTUGAL (88%).

  • 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 $203. While the most popular route (London Heathrow - Reykjavik Keflavik Intl) can be booked for $240 on average our data indicates $1,001 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, November is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of $328). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $652). 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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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 July 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$154Average$252FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$156Average$300FlexibilityNo cancel feeOn-time76%

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