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Cheap flights from Reykjavik Keflavik Intl Airport to London Heathrow Airport from £67

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 23/4. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LHR
8 Mar — 15 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap 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 6 February 2026.

Thu 5/316:20
KEF
-
LHR
Nonstop3h 10m
Icelandair
Sun 8/320:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Deal found 3/2£122
Fri 13/218:10
KEF
-
LHR
Nonstop3h 00m
British Airways
Sun 22/207:20
LHR
-
KEF
Nonstop3h 20m
British Airways
Deal found 4/2£133
Thu 5/311:45
KEF
-
LHR
Nonstop3h 10m
British Airways
Sun 8/307:20
LHR
-
KEF
Nonstop3h 20m
British Airways
Deal found 3/2£141
Fri 6/311:50
KEF
-
LHR
Nonstop3h 10m
British Airways
Mon 16/307:35
LHR
-
KEF
Nonstop3h 20m
British Airways
Deal found 4/2£152
Thu 5/307:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Tue 24/320:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Deal found 3/2£160
Sat 14/316:20
KEF
-
LHR
Nonstop3h 10m
Icelandair
Wed 18/320:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Deal found 4/2£163
Tue 3/307:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Fri 6/320:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Deal found 3/2£164
Sat 21/307:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Sun 22/320:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Deal found 3/2£169
Mon 2/307:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Mon 23/320:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Deal found 3/2£169
Tue 26/510:50
KEF
-
LHR
Nonstop3h 10m
British Airways
Fri 29/507:35
LHR
-
KEF
Nonstop3h 05m
British Airways
Deal found 5/2£171
Mon 2/307:35
KEF
-
LHR
Nonstop3h 15m
Icelandair
Sat 21/320:35
LHR
-
KEF
Nonstop3h 20m
Icelandair
Deal found 3/2£173

Find 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 6 February 2026.

Round-trip from

£122

One-way from

£67

Popular in

April

Cheapest in

December

Average price

£237

Good round-trip deal

£149 or less

Good one-way deal

£129 or less
Icelandair
  • Icelandair
  • 5/3-8/3
  • Nonstop
  • 6h 30m total
  • Reykjavik to London
Search Deals
Scandinavian Airlines
  • Scandinavian Airlines
  • 23/4
  • 1 total stop
  • 9h 20m total
  • Reykjavik to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£31 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Reykjavik Keflavik Intl to London Heathrow.
Search Deals
Price to beat on a one-way flight from Reykjavik Keflavik Intl to London Heathrow.
Search Deals

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 6 February 2026.
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

Fri 20/3

18:10-21:10

Nonstop3h 00m

London Heathrow

Sun 22/3

07:20-10:40

Nonstop3h 20m

£160

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Tue 26/5

10:50-15:00

Nonstop3h 10m

London Heathrow

Fri 29/5

07:35-09:40

Nonstop3h 05m

£171

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Tue 26/5

10:50-15:00

Nonstop3h 10m

London Heathrow

Sat 30/5

07:20-09:25

Nonstop3h 05m

£171

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Mon 2/3

07:35-10:50

Nonstop3h 15m

London Heathrow

Tue 24/3

20:35-23:55

Nonstop3h 20m

£173

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Sun 24/5

20:10-07:40

1 stop10h 30m

London Heathrow

Sun 31/5

06:30-19:10

1 stop13h 40m

£200

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Mon 25/5

10:40-14:50

Nonstop3h 10m

London Heathrow

Sat 30/5

07:20-09:25

Nonstop3h 05m

£201

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Sun 24/5

10:20-14:30

Nonstop3h 10m

London Heathrow

Sat 30/5

07:20-09:25

Nonstop3h 05m

£201

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 21/5

10:40-14:50

Nonstop3h 10m

London Heathrow

Sat 30/5

07:20-09:25

Nonstop3h 05m

£201

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Mon 25/5

10:40-14:50

Nonstop3h 10m

London Heathrow

Fri 29/5

07:35-09:40

Nonstop3h 05m

£201

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Sun 24/5

10:20-14:30

Nonstop3h 10m

London Heathrow

Fri 29/5

07:35-09:40

Nonstop3h 05m

£201

Flights are sorted by cheapest return flights first.

Deals found on 2/2

Showing 1-10 of 22 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, March is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport (average of £102). Flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport in September is currently the most expensive (average of £265). 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 6 February 2026.

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 £160. The distance from Reykjavik Keflavik Intl Airport to London Heathrow Airport is about 1177 mi. Generally, flights for this route are direct.

  • 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 (90%), Icelandair (83%), Emirates (83%).

  • 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 £66. While the most popular route (Reykjavik Keflavik Intl - London Heathrow) can be booked for £122 on average, our data indicates £211 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, March is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport (average of £102). Flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport in September is currently the most expensive (average of £265). 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
Luton
Northampton
Wembley
Gatwick
Slough
Ilford
Hounslow
Brentford
Hayes
Colchester
Watford
Guildford
Swindon
Bedford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Keflavik Intl to Heathrow

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

Fly with Cheapflights

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

Cheapflights makes it easy to find Keflavik Intl to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Keflavik Intl to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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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