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Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £69

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 27/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from London Heathrow to Reykjavik Keflavik Intl are usually found in January or February, booked 19 days in advance, depart on a Thursday or Sunday and return on a Friday

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 15 September 2025.

Round-trip from

£114

One-way from

£69

Popular in

July

Cheapest in

January

Average price

£184

Good round-trip deal

£269 or less

Good one-way deal

£451 or less
Icelandair
  • Icelandair
  • 11/11-15/11
  • Nonstop
  • 6h 35m total
  • London to Reykjavik
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Icelandair
  • Icelandair
  • 27/11
  • Nonstop
  • 3h 20m total
  • London to Reykjavik
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Highest demand for flights based on searches. 21% potential increase in price (£41 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£7 potential savings vs. average return price).
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Average for round-trip flights in September 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 15 September 2025.

Tue 11/1120:35LHR - KEF
Nonstop3h 20mIcelandair
Sat 15/1107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 13/9£114
Sat 6/1220:35LHR - KEF
Nonstop3h 20mIcelandair
Sat 13/1207:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 13/9£114
Thu 20/1120:35LHR - KEF
Nonstop3h 20mIcelandair
Sun 23/1107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 13/9£115
Wed 10/1207:30LHR - KEF
Nonstop3h 20mBritish Airways
Fri 12/1218:10KEF - LHR
Nonstop3h 00mBritish Airways
Deal found 13/9£116
Sat 8/1120:35LHR - KEF
Nonstop3h 20mIcelandair
Tue 11/1116:20KEF - LHR
Nonstop3h 10mIcelandair
Deal found 12/9£116
Mon 17/1120:35LHR - KEF
Nonstop3h 20mIcelandair
Thu 20/1116:20KEF - LHR
Nonstop3h 10mIcelandair
Deal found 14/9£117
Sun 7/1220:35LHR - KEF
Nonstop3h 20mIcelandair
Mon 15/1207:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 14/9£118
Fri 7/1120:35LHR - KEF
Nonstop3h 20mIcelandair
Mon 10/1107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 14/9£119
Thu 11/1207:25LHR - KEF
Nonstop3h 20mBritish Airways
Fri 12/1218:10KEF - LHR
Nonstop3h 00mBritish Airways
Deal found 14/9£120
Thu 30/1007:25LHR - KEF
Nonstop3h 20mBritish Airways
Thu 6/1111:45KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 14/9£121

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 15 September 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 18/1

07:20-10:40

Nonstop3h 20m

Reykjavik Keflavik Intl

Fri 23/1

11:50-15:00

Nonstop3h 10m

£120

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 18/1

07:20-10:40

Nonstop3h 20m

Reykjavik Keflavik Intl

Sat 24/1

11:55-15:05

Nonstop3h 10m

£120

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 6/11

07:25-10:45

Nonstop3h 20m

Reykjavik Keflavik Intl

Mon 10/11

11:50-15:00

Nonstop3h 10m

£120

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 20/1

07:35-10:55

Nonstop3h 20m

Reykjavik Keflavik Intl

Fri 23/1

18:10-21:10

Nonstop3h 00m

£120

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 19/1

07:35-10:55

Nonstop3h 20m

Reykjavik Keflavik Intl

Sat 24/1

11:55-15:05

Nonstop3h 10m

£120

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 21/11

20:35-23:55

Nonstop3h 20m

Reykjavik Keflavik Intl

Sun 30/11

07:35-10:50

Nonstop3h 15m

£128

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 2/3

12:15-15:30

Nonstop3h 15m

Reykjavik Keflavik Intl

Mon 9/3

07:35-10:50

Nonstop3h 15m

£132

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 3/3

12:15-15:30

Nonstop3h 15m

Reykjavik Keflavik Intl

Sun 8/3

07:35-10:50

Nonstop3h 15m

£132

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 27/2

20:35-23:55

Nonstop3h 20m

Reykjavik Keflavik Intl

Wed 11/3

16:20-19:30

Nonstop3h 10m

£132

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sat 22/11

15:35-10:30

1 stop18h 55m

Reykjavik Keflavik Intl

Thu 27/11

11:30-21:35

1 stop10h 05m

£145

Flights are sorted by cheapest return flights first.

Deals found on 13/9

Showing 1-10 of 24 results
1
2
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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 return 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 return flight from Heathrow to Keflavik Intl. Price data was last updated on 12 September 2025.

The price you pay for your flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 19 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of £75). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in July is currently the most expensive (average of £289). 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 15 September 2025.

It’s typically best to fly out from London Heathrow Airport to Reykjavik Keflavik Intl Airport in the morning. Doing so could potentially save you 30% on the flight price compared to flying at midday, which is usually more expensive.

How much does it cost for a return flight 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 15 September 2025.
Check out reviews from past customers who have flown with Scandinavian Airlines, Icelandair, andPLAY from London Heathrow Airport to Reykjavik Keflavik Intl 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.
Scandinavian Airlines
7.4
Good
1,484 reviews
Check prices

Comfort

7.3

Entertainment

6.7

Overall

7.4

Food

6.7

Boarding

7.7

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

ATH - CPH

The flight crew of Aegean were very nice. I travelled coach, so comfort and such is based on that. However, their ground crew have a serious scam going. I flew from Athens to Santorini with all carry on baggage, nothing checked. On the return flight to Athens my baggage miraculously was "too big" for the over head compartments and had to pay to check my bags. I even told them I didn't pay coming over. Their answer? "I don't care." They hit everyone going back to Athens like that...that's a serious money maker at a minimum of 40 Euros per bag.
Scandinavian Airlines
7.4
Good
1,484 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews
Check prices

Comfort

7.3

Entertainment

6.7

Overall

7.4

Food

6.7

Boarding

7.7

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

ATH - CPH

The flight crew of Aegean were very nice. I travelled coach, so comfort and such is based on that. However, their ground crew have a serious scam going. I flew from Athens to Santorini with all carry on baggage, nothing checked. On the return flight to Athens my baggage miraculously was "too big" for the over head compartments and had to pay to check my bags. I even told them I didn't pay coming over. Their answer? "I don't care." They hit everyone going back to Athens like that...that's a serious money maker at a minimum of 40 Euros per bag.
Icelandair
7.0
Good
546 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews
Check prices

Comfort

7.3

Entertainment

6.7

Overall

7.4

Food

6.7

Boarding

7.7

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

ATH - CPH

The flight crew of Aegean were very nice. I travelled coach, so comfort and such is based on that. However, their ground crew have a serious scam going. I flew from Athens to Santorini with all carry on baggage, nothing checked. On the return flight to Athens my baggage miraculously was "too big" for the over head compartments and had to pay to check my bags. I even told them I didn't pay coming over. Their answer? "I don't care." They hit everyone going back to Athens like that...that's a serious money maker at a minimum of 40 Euros per bag.
PLAY
7.0
Good
Scandinavian Airlines
7.4
Good
1,484 reviews
Check prices

Comfort

7.3

Entertainment

6.7

Overall

7.4

Food

6.7

Boarding

7.7

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

ATH - CPH

The flight crew of Aegean were very nice. I travelled coach, so comfort and such is based on that. However, their ground crew have a serious scam going. I flew from Athens to Santorini with all carry on baggage, nothing checked. On the return flight to Athens my baggage miraculously was "too big" for the over head compartments and had to pay to check my bags. I even told them I didn't pay coming over. Their answer? "I don't care." They hit everyone going back to Athens like that...that's a serious money maker at a minimum of 40 Euros per bag.
British Airways
6.7
Okay
7,361 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews
Check prices

Comfort

7.3

Entertainment

6.7

Overall

7.4

Food

6.7

Boarding

7.7

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

ATH - CPH

The flight crew of Aegean were very nice. I travelled coach, so comfort and such is based on that. However, their ground crew have a serious scam going. I flew from Athens to Santorini with all carry on baggage, nothing checked. On the return flight to Athens my baggage miraculously was "too big" for the over head compartments and had to pay to check my bags. I even told them I didn't pay coming over. Their answer? "I don't care." They hit everyone going back to Athens like that...that's a serious money maker at a minimum of 40 Euros per bag.

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.

  • How long is the flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?

    British Airways can get you from London Heathrow Airport to Reykjavik Keflavik Intl Airport in just under 3h 20m. Your travel time will be generally consistent. There are 1177 mi between London Heathrow Airport and Reykjavik Keflavik Intl Airport. All flights are typically direct.

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

    Flying on PLAY is currently your cheapest option to Reykjavik Keflavik Intl Airport, with prices starting at £85. Additional return tickets that might be worth considering are offered by British Airways and Icelandair, with the lowest prices starting at £116 and £131, respectively. These flights start at 59% lower than the current average price 3 months from now.

  • 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 American Airlines (87%), Qatar Airways (87%) and Japan Airlines (87%).

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

    While on average a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport is generally £814, our data shows the cheapest flight currently is £97. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £104 for that flight.

  • 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 holiday 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of £75). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in July is currently the most expensive (average of £289). 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

Travelling to a place near Reykjavik Keflavik Intl Airport?

Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locations
Hveragerdi
Keflavik

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Top 4 airlines flying from Heathrow to Keflavik Intl

Discover the top 4 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 858,174 searches. Data last updated 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£83Average£122FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
British AirwaysCheapest£115Average£206FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£133Average£229FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£134Average£271FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to Keflavik Intl?

When you search for this flight from Heathrow to Keflavik Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Keflavik Intl?

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Can Cheapflights find flights from Heathrow to Keflavik Intl with no change fees?

Need flexible booking options for your flight to Keflavik Intl from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Keflavik Intl become cheaper?

Yes! Start tracking prices for Heathrow to Keflavik Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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