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Cheap flights from Reykjavik Keflavik Intl Airport to London Heathrow Airport from £89

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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LHR
21 Jun — 28 Jun1
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 22 May 2026.

Fri 5/617:45
KEF
-
LHR
1 stop14h 35m
Scandinavian Airlines
Tue 9/619:50
LHR
-
KEF
1 stop13h 00m
Scandinavian Airlines
Deal found 19/5£185
Fri 5/617:45
KEF
-
LHR
1 stop18h 50m
Scandinavian Airlines
Mon 8/617:30
LHR
-
KEF
1 stop17h 55m
Scandinavian Airlines
Deal found 21/5£188
Thu 4/617:35
KEF
-
LHR
1 stop21h 25m
Multiple Airlines
Mon 8/621:25
LHR
-
KEF
Nonstop3h 10m
Multiple Airlines
Deal found 19/5£192
Mon 1/600:20
KEF
-
LHR
1 stop6h 20m
Lufthansa
Thu 4/609:00
LHR
-
KEF
1 stop16h 10m
Lufthansa
Deal found 18/5£195
Thu 4/617:35
KEF
-
LHR
1 stop21h 25m
Scandinavian Airlines
Mon 8/617:30
LHR
-
KEF
1 stop17h 55m
Scandinavian Airlines
Deal found 19/5£196
Thu 3/1214:45
KEF
-
LHR
1 stop25h 20m
KLM
Fri 15/117:50
LHR
-
KEF
1 stop19h 55m
KLM
Deal found 19/5£200
Wed 2/1218:05
KEF
-
LHR
1 stop21h 55m
Multiple Airlines
Mon 7/1220:35
LHR
-
KEF
Nonstop3h 20m
Multiple Airlines
Deal found 20/5£203
Wed 3/617:35
KEF
-
LHR
1 stop14h 45m
Scandinavian Airlines
Thu 4/619:50
LHR
-
KEF
1 stop12h 15m
Scandinavian Airlines
Deal found 18/5£206

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 22 May 2026.

Round-trip from

£161

One-way from

£89

Popular in

September

Cheapest in

January

Average price

£207

Good round-trip deal

£351 or less

Good one-way deal

£189 or less
Icelandair
  • Icelandair
  • 26/10-3/11
  • 1 total stop
  • 25h 20m total
  • Reykjavik to London
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Scandinavian Airlines
  • Scandinavian Airlines
  • 5/9
  • 1 total stop
  • 14h 00m total
  • Reykjavik to London
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£28 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
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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.
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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 22 May 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

Fly to

Route

Depart

Return

Price

Cheapest return flight

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 10/9

17:05-09:20

1 stop15h 15m

London Heathrow

Mon 14/9

19:50-10:25

1 stop15h 35m

£282

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 5/6

07:55-18:50

1 stop9h 55m

London Heathrow

Thu 11/6

17:30-07:05

1 stop14h 35m

£296

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Tue 7/7

10:30-18:30

1 stop7h 00m

London Heathrow

Tue 21/7

10:35-17:20

1 stop7h 45m

£308

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Sat 8/8

07:40-11:55

Nonstop3h 15m

London Heathrow

Sat 15/8

21:25-23:35

Nonstop3h 10m

£317
Fastest return journey

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 5/6

16:10-20:20

Nonstop3h 10m

London Heathrow

Thu 11/6

21:25-23:35

Nonstop3h 10m

£324

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Mon 14/9

10:30-19:25

2 stops7h 55m

London Heathrow

Fri 18/9

20:55-16:20

2 stops20h 25m

£331

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 6/11

11:35-07:40

2 stops20h 05m

London Heathrow

Sun 8/11

06:30-17:20

2 stops10h 50m

£348

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Wed 12/8

01:25-09:20

1 stop6h 55m

London Heathrow

Sun 16/8

17:30-00:05

1 stop7h 35m

£396

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Tue 2/6

11:15-07:40

2 stops19h 25m

London Heathrow

Tue 9/6

20:55-10:25

2 stops14h 30m

£424

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Sat 20/6

07:40-11:55

Nonstop3h 15m

London Heathrow

Sat 25/7

21:25-23:35

Nonstop3h 10m

£426

Flights are sorted by cheapest return flights first.

Deals found on 21/5

Showing 1-10 of 23 resultsSorted by cheapest first
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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 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 22 May 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.

How much does it cost for a return flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport?

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 15m. Scandinavian Airlines provides one of the quickest options available for as low as £317. 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: Japan Airlines (88%), Turkish Airlines (86%), Icelandair (86%).

  • 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 £152. While the most popular route (Reykjavik Keflavik Intl - London Heathrow) can be booked for £197 on average, our data indicates £368 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.

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
Hounslow
Milton Keynes
Croydon
Northampton
Wembley
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Watford
Romford
Kingston upon Thames
Eastbourne
Ipswich
Swindon
Guildford
Southall

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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

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

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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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