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Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £66

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 27/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
27 Mar — 3 Apr1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Reykjavik Keflavik Intl are usually found in January or February, booked 43 days in advance, depart on a Sunday or Thursday 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 22 March 2025.

Round-trip from

£110

One-way from

£66

Popular in

July

Cheapest in

January

Average price

£186

Good round-trip deal

£341 or less

Good one-way deal

£399 or less
Icelandair
  • Icelandair
  • 9/5-11/5
  • Nonstop
  • 6h 20m total
  • London to Reykjavik
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Icelandair
  • Icelandair
  • 27/5
  • Nonstop
  • 3h 10m total
  • London to Reykjavik
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Highest demand for flights based on searches. 21% potential increase in price (£44 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£8 potential savings vs. average return price).
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Average for round-trip flights in March 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 22 March 2025.

Wed 7/521:25LHR - KEF
Nonstop3h 10mIcelandair
Wed 21/507:40KEF - LHR
Nonstop3h 15mIcelandair
Deal found 21/3£111
Sat 8/1107:35LHR - KEF
Nonstop3h 20mBritish Airways
Wed 12/1111:45KEF - LHR
Nonstop3h 15mBritish Airways
Deal found 21/3£128
Wed 7/521:25LHR - KEF
Nonstop3h 10mMultiple Airlines
Wed 21/511:05KEF - LHR
1 stop6h 45mMultiple Airlines
Deal found 21/3£140
Sun 27/410:35LHR - KEF
1 stop5h 45mScandinavian Airlines
Mon 5/511:05KEF - LHR
1 stop6h 45mScandinavian Airlines
Deal found 22/3£146
Thu 3/407:25LHR - KEF
1 stop17h 45mLufthansa
Wed 9/400:25KEF - LHR
1 stop15h 15mLufthansa
Deal found 21/3£184
Wed 14/517:10LHR - KEF
1 stop16h 10mSWISS
Sat 24/514:50KEF - LHR
1 stop16h 05mSWISS
Deal found 21/3£242

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 22 March 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

Wed 7/5

21:25-23:35

Nonstop3h 10m

Reykjavik Keflavik Intl

Wed 21/5

07:40-11:55

Nonstop3h 15m

£111

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 7/5

21:25-23:35

Nonstop3h 10m

Reykjavik Keflavik Intl

Wed 21/5

11:05-18:50

1 stop6h 45m

£140

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Fri 25/4

07:35-09:40

Nonstop3h 05m

Reykjavik Keflavik Intl

Wed 30/4

10:55-15:10

Nonstop3h 15m

£141

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sun 27/4

10:35-15:20

1 stop5h 45m

Reykjavik Keflavik Intl

Mon 5/5

11:05-18:50

1 stop6h 45m

£146

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 3/4

07:25-00:10

1 stop17h 45m

Reykjavik Keflavik Intl

Wed 9/4

00:25-16:40

1 stop15h 15m

£184

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Wed 28/5

12:10-08:20

1 stop21h 10m

Reykjavik Keflavik Intl

Thu 5/6

09:05-17:50

1 stop7h 45m

£220

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Thu 12/6

21:25-23:35

Nonstop3h 10m

£68

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Mon 21/4

07:40-09:45

Nonstop3h 05m

£80

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Sat 7/6

06:40-16:20

1 stop10h 40m

£94

LondonReykjavik

LHR - KEF

LHRKEF

London Heathrow

Tue 16/9

20:05-07:25

1 stop12h 20m

£94

Flights are sorted by cheapest return flights first.

Deals found on 21/3

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 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 14 March 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 43 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 22 March 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 33% on the flight price compared to flying at midday, which is usually more expensive.

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 22 March 2025.

The most flights from LHR to KEF are scheduled on a Friday (12 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 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 40.0 - 80.0 inches per month. January is typically the wettest month, when rainfall can reach 80.0 mm. May is typically the driest time to visit Reykjavik Keflavik Intl Airport when rainfall is around 40.0 mm.

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 11.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

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 22 March 2025.
To help decide which airline to fly from London to Reykjavik, see what other customers have to say about SWISS, Scandinavian Airlines and Icelandair. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
SWISS
7.5
Good
1,567 reviews
Check prices

Food

7.0

Boarding

7.6

Entertainment

6.7

Overall

7.5

Crew

8.2

Comfort

7.3

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.
SWISS
7.5
Good
1,567 reviews
SWISS
7.5
Good
1,567 reviews
Check prices

Food

7.0

Boarding

7.6

Entertainment

6.7

Overall

7.5

Crew

8.2

Comfort

7.3

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.
Scandinavian Airlines
7.3
Good
1,323 reviews
SWISS
7.5
Good
1,567 reviews
Check prices

Food

7.0

Boarding

7.6

Entertainment

6.7

Overall

7.5

Crew

8.2

Comfort

7.3

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.
Icelandair
7.0
Good
474 reviews
SWISS
7.5
Good
1,567 reviews
Check prices

Food

7.0

Boarding

7.6

Entertainment

6.7

Overall

7.5

Crew

8.2

Comfort

7.3

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.
Lufthansa
6.7
Okay
6,944 reviews
SWISS
7.5
Good
1,567 reviews
Check prices

Food

7.0

Boarding

7.6

Entertainment

6.7

Overall

7.5

Crew

8.2

Comfort

7.3

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.
Eurowings
6.6
Okay
274 reviews
SWISS
7.5
Good
1,567 reviews
Check prices

Food

7.0

Boarding

7.6

Entertainment

6.7

Overall

7.5

Crew

8.2

Comfort

7.3

Reviews

1 / 20
6.0
Good

Be,Oct 2023

FCO - ZRH

Very crowded flight. Staff brought refreshments regularly and the food was surprisingly good. But checking was very slow and they allowed way too many people with large suitcases on board making onboarding and off-boarding very slow and chaotic.

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?

    Flying on Icelandair is currently your cheapest option to Reykjavik Keflavik Intl Airport, with prices starting at £110. Additional return tickets that might be worth considering are offered by British Airways and Scandinavian Airlines, with the lowest prices starting at £141 and £147, respectively. These flights start at 47% lower than the current average price 3 months from now.

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

    The cheapet airlines for a one-way flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport are Icelandair (£66), British Airways (£69), and Scandinavian Airlines (£88).

  • 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 Qatar Airways (98%), American Airlines (93%) and Qantas Airways (93%).

  • 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 £1,040, our data shows the cheapest flight currently is £128. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £116 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Keflavik

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Alternative routes for Heathrow to Keflavik Intl

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Keflavik Intl flights
Stansted to Keflavik Intl flights
London City to Keflavik Intl flights
Luton to Keflavik Intl flights
Southend to Keflavik Intl flights

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 22 March 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£87Average£111FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
British AirwaysCheapest£105Average£196FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£139Average£218FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£158Average£305FlexibilityNo 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?

Cheapflights helps you find that perfect flight to Keflavik Intl from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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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