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Cheap flights from Reykjavik Keflavik Intl Airport to London Heathrow 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LHR
30 marras — 7 joulu1
1 adult
1 adult, Economy, 0 bags

Cheap 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 31 lokakuu 2025.

Round-trip from

£136

One-way from

£66

Popular in

April

Cheapest in

March

Average price

£316

Good round-trip deal

£177 or less

Good one-way deal

£202 or less
British Airways
  • British Airways
  • 28/11-30/11
  • Nonstop
  • 6h 20m total
  • Reykjavik to London
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Scandinavian Airlines
  • Scandinavian Airlines
  • 8/12
  • 1 total stop
  • 5h 50m total
  • Reykjavik to London
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Highest demand for flights based on searches. 5% potential increase in price (£13 potential increase over avg. return price).
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Cheapest flight prices on average. 6% potential price decrease (£12 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Reykjavik Keflavik Intl to London Heathrow.
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Price to beat on a one-way flight from Reykjavik Keflavik Intl to London Heathrow.
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Find flight deals from Keflavik Intl to Heathrow

Enter your travel dates to find the best prices.

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 31 lokakuu 2025.

pe 28/1118:10KEF - LHR
Nonstop3h 00mBritish Airways
su 30/1107:20LHR - KEF
Nonstop3h 20mBritish Airways
Deal found 30/10£136
la 6/1211:55KEF - LHR
Nonstop3h 10mBritish Airways
ti 9/1207:35LHR - KEF
Nonstop3h 20mBritish Airways
Deal found 30/10£143
to 4/1211:45KEF - LHR
Nonstop3h 10mBritish Airways
ti 9/1207:35LHR - KEF
Nonstop3h 20mBritish Airways
Deal found 29/10£146
to 4/1211:45KEF - LHR
Nonstop3h 10mBritish Airways
su 7/1207:20LHR - KEF
Nonstop3h 20mBritish Airways
Deal found 30/10£149
pe 19/1218:10KEF - LHR
Nonstop3h 00mMultiple Airlines
su 4/120:35LHR - KEF
Nonstop3h 20mMultiple Airlines
Deal found 30/10£155
la 6/1211:55KEF - LHR
Nonstop3h 10mMultiple Airlines
ti 9/1220:35LHR - KEF
Nonstop3h 20mMultiple Airlines
Deal found 29/10£160
pe 21/1118:10KEF - LHR
Nonstop3h 00mBritish Airways
ma 24/1107:35LHR - KEF
Nonstop3h 20mBritish Airways
Deal found 29/10£165
to 11/1211:45KEF - LHR
Nonstop3h 10mMultiple Airlines
ti 16/1220:35LHR - KEF
Nonstop3h 20mMultiple Airlines
Deal found 28/10£168

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 31 lokakuu 2025.
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

Keflavik Intl

Fly to

Heathrow

Route

Depart

Return

Price

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

pe 23/1

18:10-21:10

Nonstop3h 00m

London Heathrow

su 25/1

13:40-17:05

Nonstop3h 25m

£145

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

pe 30/1

11:50-15:00

Nonstop3h 10m

London Heathrow

ti 3/2

07:35-10:55

Nonstop3h 20m

£162

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

pe 21/11

18:10-21:10

Nonstop3h 00m

London Heathrow

ma 24/11

07:35-10:55

Nonstop3h 20m

£165

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

to 12/3

11:25-19:15

1 stop7h 50m

London Heathrow

ti 17/3

10:00-18:00

1 stop8h 00m

£181

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

pe 16/1

11:25-20:50

1 stop9h 25m

London Heathrow

su 18/1

08:40-19:05

1 stop10h 25m

£181

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

pe 23/1

11:25-20:50

1 stop9h 25m

London Heathrow

su 25/1

08:40-19:05

1 stop10h 25m

£181

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

ke 11/3

20:05-09:00

1 stop12h 55m

London Heathrow

ke 18/3

06:30-19:05

1 stop12h 35m

£181

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

la 24/1

11:55-15:05

Nonstop3h 10m

£73

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

ti 23/12

19:30-09:35

1 stop14h 05m

£74

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

ke 4/3

11:50-15:00

Nonstop3h 10m

£75

Flights are sorted by cheapest return flights first.

Deals found on 29/10

Showing 1-10 of 19 results
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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 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 Reykjavik Keflavik Intl Airport to London Heathrow Airport

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

Currently, December is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport (average of £134). Flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport in September is currently the most expensive (average of £273). 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 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 31 lokakuu 2025.

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.

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?

    A quick flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport can take about 3h. British Airways provides one of the quickest options available for as low as £145. The distance from Reykjavik Keflavik Intl Airport to London Heathrow Airport is about 1177 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most reliable airlines from Reykjavik Keflavik Intl Airport to London Heathrow Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Reykjavik Keflavik Intl Airport to London Heathrow Airport on time: Turkish Airlines (92%), Emirates (89%), Icelandair (87%).

  • 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 £133. While the most popular route (Reykjavik Keflavik Intl - London Heathrow) can be booked for £126 on average, our data indicates £394 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 holiday 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.

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

    Currently, December is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport (average of £134). Flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport in September is currently the most expensive (average of £273). 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
Milton Keynes
Croydon
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
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Swindon
Crawley
Romford
Brentford
Ipswich

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Keflavik Intl to Heathrow flexibly with Cheapflights today.

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

Yes, Cheapflights offers price alerts on Keflavik Intl to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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