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Keflavik Intl

$112+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 Sunday

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 June 12, 2025.

Round-trip from

$192
(FlightHub)

One-way from

$112
(FlightHub)

Popular in

July

Cheapest in

January

Average price

$304

Good round-trip deal

$300 or less

Good one-way deal

$164 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 ($75 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 June 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 June 12, 2025.

This British Airways deal was found by Cheapflights users on 6/10. 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.
Sun 11/307:20 amLHR - KEF
Nonstop3h 20mBritish Airways
Sat 12/611:50 amKEF - LHR
Nonstop3h 15mBritish Airways
Deal found 6/10$167
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/229:25 pmLHR - KEF
Nonstop3h 10mIcelandair
Thu 10/24:10 pmKEF - LHR
Nonstop3h 10mIcelandair
Deal found 6/11$180
This Scandinavian Airlines deal was found by Cheapflights users on 6/10. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/95:30 pmLHR - KEF
1 stop14h 35mScandinavian Airlines
Mon 10/1311:05 amKEF - LHR
1 stop6h 45mScandinavian Airlines
Deal found 6/10$190
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/231:45 pmLHR - KEF
Nonstop3h 25mMultiple Airlines
Mon 11/241:00 pmKEF - LHR
1 stop5h 50mMultiple Airlines
Deal found 6/11$244
This Austrian Airlines deal was found by Cheapflights users on 6/10. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/56:00 amLHR - KEF
1 stop18h 20mAustrian Airlines
Fri 10/1712:10 amKEF - LHR
1 stop7h 50mAustrian Airlines
Deal found 6/10$279
This Lufthansa deal was found by Cheapflights users on 6/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/195:50 pmLHR - KEF
1 stop7h 20mLufthansa
Wed 6/2512:25 amKEF - LHR
1 stop6h 15mLufthansa
Deal found 6/11$282
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/266:00 amLHR - KEF
1 stop27h 15mSWISS
Sun 6/2912:45 amKEF - LHR
2 stops30h 30mSWISS
Deal found 6/10$342

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 June 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

Sun 11/30

7:20 am-10:40 am

Nonstop3h 20m

Reykjavik Keflavik Intl

Sat 12/6

11:50 am-3:05 pm

Nonstop3h 15m

$167

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 9/22

9:25 pm-11:35 pm

Nonstop3h 10m

Reykjavik Keflavik Intl

Thu 10/2

4:10 pm-8:20 pm

Nonstop3h 10m

$180

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 10/9

5:30 pm-7:05 am

1 stop14h 35m

Reykjavik Keflavik Intl

Mon 10/13

11:05 am-6:50 pm

1 stop6h 45m

$190

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 11/23

1:45 pm-5:10 pm

Nonstop3h 25m

Reykjavik Keflavik Intl

Mon 11/24

1:00 pm-6:50 pm

1 stop5h 50m

$244

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 10/5

6:00 am-11:20 pm

1 stop18h 20m

Reykjavik Keflavik Intl

Fri 10/17

12:10 am-9:00 am

1 stop7h 50m

$279

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 6/26

6:00 am-8:15 am

1 stop27h 15m

Reykjavik Keflavik Intl

Sun 6/29

12:45 am-8:15 am

2 stops30h 30m

$342

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 8/18

7:50 pm-8:45 am

1 stop13h 55m

$112

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 9/16

6:55 am-7:25 am

1 stop25h 30m

$117

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sat 8/30

9:25 pm-11:35 pm

Nonstop3h 10m

$136

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 6/23

7:40 am-9:45 am

Nonstop3h 05m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 14 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 June 9, 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 $659). 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 June 12, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 44% 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 June 12, 2025.

The most flights from LHR to KEF are scheduled on a Wednesday (10 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Keflavik Intl by month

Plan your trip to Keflavik Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Reykjavik Keflavik Intl Airport ranges from 1.6 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. May is typically the driest time to visit Reykjavik Keflavik Intl Airport when rainfall is around 1.6 in.

Temperature in Keflavik Intl by month

Plan your trip to Keflavik Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Reykjavik Keflavik Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 51.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 June 12, 2025.
See what other customers who have flown with SWISS, Scandinavian Airlines and Icelandair from London to Reykjavik have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
SWISS
7.5
Good
1,623 reviews

Overall

7.5

Entertainment

6.7

Comfort

7.4

Food

7.0

Boarding

7.6

Crew

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2024

BLQ - ZRH

We had to wait more than an hour at check in because they said I requested an upgrade to business class (which I didn’t) and weren’t able to cancel it. They finally assigned us regular seats but I got stopped again at the gate because of the same issue. We barely made it on time. Poor management on the connecting flight (a 10 hour flight) where they let two young mothers sit together near us (they were sitting in separate areas when we boarded), who were talking endlessly, both with screaming babies, and no help from the crew to make them aware of other people around them.
SWISS
7.5
Good
1,623 reviews
SWISS
7.5
Good
1,623 reviews

Overall

7.5

Entertainment

6.7

Comfort

7.4

Food

7.0

Boarding

7.6

Crew

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2024

BLQ - ZRH

We had to wait more than an hour at check in because they said I requested an upgrade to business class (which I didn’t) and weren’t able to cancel it. They finally assigned us regular seats but I got stopped again at the gate because of the same issue. We barely made it on time. Poor management on the connecting flight (a 10 hour flight) where they let two young mothers sit together near us (they were sitting in separate areas when we boarded), who were talking endlessly, both with screaming babies, and no help from the crew to make them aware of other people around them.
Scandinavian Airlines
7.3
Good
1,387 reviews
SWISS
7.5
Good
1,623 reviews

Overall

7.5

Entertainment

6.7

Comfort

7.4

Food

7.0

Boarding

7.6

Crew

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2024

BLQ - ZRH

We had to wait more than an hour at check in because they said I requested an upgrade to business class (which I didn’t) and weren’t able to cancel it. They finally assigned us regular seats but I got stopped again at the gate because of the same issue. We barely made it on time. Poor management on the connecting flight (a 10 hour flight) where they let two young mothers sit together near us (they were sitting in separate areas when we boarded), who were talking endlessly, both with screaming babies, and no help from the crew to make them aware of other people around them.
Icelandair
7.0
Good
499 reviews
SWISS
7.5
Good
1,623 reviews

Overall

7.5

Entertainment

6.7

Comfort

7.4

Food

7.0

Boarding

7.6

Crew

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2024

BLQ - ZRH

We had to wait more than an hour at check in because they said I requested an upgrade to business class (which I didn’t) and weren’t able to cancel it. They finally assigned us regular seats but I got stopped again at the gate because of the same issue. We barely made it on time. Poor management on the connecting flight (a 10 hour flight) where they let two young mothers sit together near us (they were sitting in separate areas when we boarded), who were talking endlessly, both with screaming babies, and no help from the crew to make them aware of other people around them.
Iberia
7.0
Good
2,776 reviews
SWISS
7.5
Good
1,623 reviews

Overall

7.5

Entertainment

6.7

Comfort

7.4

Food

7.0

Boarding

7.6

Crew

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2024

BLQ - ZRH

We had to wait more than an hour at check in because they said I requested an upgrade to business class (which I didn’t) and weren’t able to cancel it. They finally assigned us regular seats but I got stopped again at the gate because of the same issue. We barely made it on time. Poor management on the connecting flight (a 10 hour flight) where they let two young mothers sit together near us (they were sitting in separate areas when we boarded), who were talking endlessly, both with screaming babies, and no help from the crew to make them aware of other people around them.
Eurowings
6.7
Okay
279 reviews
SWISS
7.5
Good
1,623 reviews

Overall

7.5

Entertainment

6.7

Comfort

7.4

Food

7.0

Boarding

7.6

Crew

8.2

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2024

BLQ - ZRH

We had to wait more than an hour at check in because they said I requested an upgrade to business class (which I didn’t) and weren’t able to cancel it. They finally assigned us regular seats but I got stopped again at the gate because of the same issue. We barely made it on time. Poor management on the connecting flight (a 10 hour flight) where they let two young mothers sit together near us (they were sitting in separate areas when we boarded), who were talking endlessly, both with screaming babies, and no help from the crew to make them aware of other people around them.

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 $192. Other airlines that can offer you cheap pricing are Scandinavian Airlines, from $219, and Lufthansa, from $282. Icelandair is 31% 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?

    $112 is the cheapest one-way deal found within the past few days, from Scandinavian Airlines. You may also be able to find cheap deals on Icelandair and British Airways, with prices starting from $136 and $157, 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%), Turkish Airlines (93%) and American Airlines (92%).

  • 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 $114. While the most popular route (London Heathrow - Reykjavik Keflavik Intl) can be booked for $459 on average our data indicates $1,059 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 $659). 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?

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Keflavik

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Alternative routes for Heathrow to Keflavik Intl

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$154Average$253FlexibilityNo cancel feeOn-time70%
IcelandairCheapest$156Average$286FlexibilityNo cancel feeOn-time76%

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