What is the cheapest day to fly from Reykjavik Keflavik Intl Airport to London Heathrow Airport?

Travellers seeking maximum savings on their Reykjavik Keflavik Intl Airport to London Heathrow Airport flight should consider departing on Monday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Reykjavik Keflavik Intl Airport to London Heathrow Airport

The most flights from KEF to LHR are scheduled on a Friday (14 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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%), Emirates (88%), Icelandair (86%).

What is the cheapest day to fly round-trip from Reykjavik Keflavik Intl Airport to London Heathrow Airport?

Users have found that flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport on a Friday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

What is the cheapest month to fly from Reykjavik Keflavik Intl Airport to London Heathrow Airport?

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, March can be a great choice for travel to London Heathrow Airport. Flights to London Heathrow Airport from Reykjavik Keflavik Intl Airport in March are about £153 on average during March, but can be found for as low as £41.

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.

£64+ Flights from Reykjavik Keflavik Intl Airport to London Heathrow Airport

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

Airfare is below average for this route at the moment. Reykjavik Keflavik Intl Airport to London Heathrow Airport flights typically cost between £254 and £313 in January. The cheapest return flight price found within the last 3 days was £136 on British Airways (23 Jan-25 Jan).

Cheap flight deals from Keflavik Intl to Heathrow

Round-trip from	£136
One-way from	£64
Popular in	April
Cheapest in	March
Average price	£310
Good round-trip deal	£183 or less
Good one-way deal	£225 or less

British Airways
23/1-25/1
Nonstop
6h 25m total
Reykjavik to London

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British Airways
12/12
Nonstop
3h 10m total
Reykjavik to London

Search Deals

Highest demand for flights based on searches. 6% potential increase in price (£13 potential increase over avg. return price).

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Cheapest flight prices on average. 6% potential price decrease (£11 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 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

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 14 September 2025.

Fri 21/1118:10KEF - LHR

Nonstop3h 00mBritish Airways

Mon 24/1107:35LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 13/9£139

Fri 21/1118:10KEF - LHR

Nonstop3h 00mBritish Airways

Sun 23/1113:40LHR - KEF

Nonstop3h 25mBritish Airways

Deal found 12/9£139

Mon 27/1013:00KEF - LHR

1 stop5h 50mMultiple Airlines

Mon 3/1120:35LHR - KEF

Nonstop3h 20mMultiple Airlines

Deal found 11/9£140

Mon 24/1113:00KEF - LHR

1 stop8h 35mMultiple Airlines

Tue 25/1120:35LHR - KEF

Nonstop3h 20mMultiple Airlines

Deal found 12/9£147

Thu 6/1111:30KEF - LHR

1 stop6h 10mScandinavian Airlines

Mon 10/1118:40LHR - KEF

1 stop16h 05mScandinavian Airlines

Deal found 13/9£147

Tue 30/1211:50KEF - LHR

Nonstop3h 10mBritish Airways

Mon 5/107:35LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 12/9£148

Wed 12/1111:50KEF - LHR

Nonstop3h 10mBritish Airways

Thu 20/1107:25LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 12/9£149

Thu 6/1111:45KEF - LHR

Nonstop3h 10mBritish Airways

Mon 10/1107:35LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 13/9£150

Mon 24/1111:50KEF - LHR

Nonstop3h 10mBritish Airways

Tue 25/1107:35LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 12/9£152

Best flights from Keflavik Intl to Heathrow
Discover carefully curated flight deals from Keflavik Intl to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 14 September 2025.

Mon 24/1113:00KEF - LHR

1 stop8h 35mMultiple Airlines

Tue 25/1120:35LHR - KEF

Nonstop3h 20mMultiple Airlines

Deal found 12/9£147

Thu 6/1111:45KEF - LHR

Nonstop3h 10mBritish Airways

Mon 10/1107:35LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 12/9£156

Mon 24/1113:00KEF - LHR

1 stop8h 35mScandinavian Airlines

Tue 25/1119:50LHR - KEF

2 stops14h 55mScandinavian Airlines

Deal found 12/9£164

Wed 12/1111:50KEF - LHR

Nonstop3h 10mBritish Airways

Thu 20/1107:25LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 13/9£156

Thu 6/1111:30KEF - LHR

1 stop6h 10mMultiple Airlines

Mon 10/1120:35LHR - KEF

Nonstop3h 20mMultiple Airlines

Deal found 13/9£158

Wed 12/1111:30KEF - LHR

1 stop6h 10mScandinavian Airlines

Thu 20/1117:00LHR - KEF

1 stop17h 45mScandinavian Airlines

Deal found 12/9£168

Fri 12/1211:50KEF - LHR

Nonstop3h 10mMultiple Airlines

Fri 12/1220:35LHR - KEF

Nonstop3h 20mMultiple Airlines

Deal found 13/9£161

Sun 7/1217:55KEF - LHR

Nonstop3h 00mBritish Airways

Thu 11/1207:25LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 11/9£167

Mon 27/1013:00KEF - LHR

1 stop8h 35mScandinavian Airlines

Thu 30/1017:30LHR - KEF

2 stops17h 15mScandinavian Airlines

Deal found 12/9£173

Tue 25/1111:30KEF - LHR

1 stop7h 00mMultiple Airlines

Thu 27/1120:35LHR - KEF

Nonstop3h 20mMultiple Airlines

Deal found 12/9£161

Direct flights from Keflavik Intl to Heathrow
Explore direct flight options from Keflavik Intl to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 14 September 2025.

Fri 23/118:10KEF - LHR

Nonstop3h 00mBritish Airways

Sun 25/113:40LHR - KEF

Nonstop3h 25mBritish Airways

Deal found 12/9£136

Fri 21/1118:10KEF - LHR

Nonstop3h 00mBritish Airways

Mon 24/1107:35LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 13/9£139

Fri 21/1118:10KEF - LHR

Nonstop3h 00mBritish Airways

Sun 23/1113:40LHR - KEF

Nonstop3h 25mBritish Airways

Deal found 12/9£139

Fri 30/111:50KEF - LHR

Nonstop3h 10mBritish Airways

Tue 3/207:35LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 12/9£145

Tue 30/1211:50KEF - LHR

Nonstop3h 10mBritish Airways

Mon 5/107:35LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 12/9£148

Wed 12/1111:50KEF - LHR

Nonstop3h 10mBritish Airways

Thu 20/1107:25LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 12/9£149

Thu 6/1111:45KEF - LHR

Nonstop3h 10mBritish Airways

Mon 10/1107:35LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 13/9£150

Mon 24/1111:50KEF - LHR

Nonstop3h 10mBritish Airways

Tue 25/1107:35LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 12/9£152

Last-minute flights from Keflavik Intl to Heathrow
Discover last-minute flight deals from Keflavik Intl to Heathrow. Data last updated 14 September 2025 and is based on user searches.

Mon 20/1017:10KEF - LHR

2 stops18h 45mScandinavian Airlines

Tue 21/1018:40LHR - KEF

1 stop15h 50mScandinavian Airlines

Deal found 11/9£179

Mon 27/1013:00KEF - LHR

1 stop5h 50mMultiple Airlines

Mon 3/1120:35LHR - KEF

Nonstop3h 20mMultiple Airlines

Deal found 11/9£140

Mon 27/1013:00KEF - LHR

1 stop5h 50mMultiple Airlines

Thu 30/1020:35LHR - KEF

Nonstop3h 20mMultiple Airlines

Deal found 12/9£155

Mon 27/1013:00KEF - LHR

1 stop8h 35mScandinavian Airlines

Thu 30/1019:30LHR - KEF

1 stop15h 15mScandinavian Airlines

Deal found 12/9£170

Mon 27/1013:00KEF - LHR

1 stop8h 35mMultiple Airlines

Wed 5/1120:35LHR - KEF

Nonstop3h 20mMultiple Airlines

Deal found 12/9£181

Mon 27/1011:50KEF - LHR

Nonstop3h 10mBritish Airways

Mon 3/1107:35LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 11/9£182

Mon 27/1011:50KEF - LHR

Nonstop3h 10mBritish Airways

Wed 5/1107:30LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 13/9£184

Mon 27/1011:50KEF - LHR

Nonstop3h 10mBritish Airways

Thu 30/1007:25LHR - KEF

Nonstop3h 20mBritish Airways

Deal found 12/9£189

One-way flights from Keflavik Intl to Heathrow
Search for one-way flight options from Keflavik Intl to Heathrow. Find affordable one-way fares based on user searches. Data last updated 14 September 2025.

Fri 12/1211:50KEF - LHR

Nonstop3h 10mBritish Airways

Deal found 13/9£64

Thu 11/1211:45KEF - LHR

Nonstop3h 10mBritish Airways

Deal found 13/9£65

Mon 8/1213:00KEF - LHR

1 stop8h 35mScandinavian Airlines

Deal found 12/9£66

Mon 27/1013:00KEF - LHR

1 stop5h 50mScandinavian Airlines

Deal found 12/9£69

Tue 23/1212:00KEF - LHR

1 stop6h 50mScandinavian Airlines

Deal found 12/9£72

Fri 30/111:50KEF - LHR

Nonstop3h 10mBritish Airways

Deal found 12/9£72

Thu 20/1111:30KEF - LHR

1 stop7h 20mScandinavian Airlines

Deal found 11/9£73

Sat 24/111:55KEF - LHR

Nonstop3h 10mBritish Airways

Deal found 12/9£74

Sun 5/1017:25KEF - LHR

1 stop21h 35mScandinavian Airlines

Deal found 12/9£75

Thu 27/1111:45KEF - LHR

Nonstop3h 10mBritish Airways

Deal found 12/9£76

Fri 12/1211:30KEF - LHR

1 stop6h 10mScandinavian Airlines

Deal found 13/9£77

Cheapflights Fare Finder

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

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Mon 24/11

13:00-21:35

1 stop8h 35m

London Heathrow

Tue 25/11

20:35-23:55

Nonstop3h 20m

£147

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 6/11

11:45-14:55

Nonstop3h 10m

London Heathrow

Mon 10/11

07:35-10:55

Nonstop3h 20m

£156

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Wed 12/11

11:50-15:00

Nonstop3h 10m

London Heathrow

Thu 20/11

07:25-10:45

Nonstop3h 20m

£156

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 6/11

11:30-17:40

1 stop6h 10m

London Heathrow

Mon 10/11

20:35-23:55

Nonstop3h 20m

£158

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 12/12

11:50-15:00

Nonstop3h 10m

London Heathrow

Fri 12/12

20:35-23:55

Nonstop3h 20m

£161

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Tue 25/11

11:30-18:30

1 stop7h 00m

London Heathrow

Thu 27/11

20:35-23:55

Nonstop3h 20m

£161

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Mon 24/11

13:00-21:35

1 stop8h 35m

London Heathrow

Tue 25/11

19:50-10:45

2 stops14h 55m

£164

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Sun 7/12

17:55-20:55

Nonstop3h 00m

London Heathrow

Thu 11/12

07:25-10:45

Nonstop3h 20m

£167

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Wed 12/11

11:30-17:40

1 stop6h 10m

London Heathrow

Thu 20/11

17:00-10:45

1 stop17h 45m

£168

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Mon 27/10

13:00-21:35

1 stop8h 35m

London Heathrow

Thu 30/10

17:30-10:45

2 stops17h 15m

£173

Flights are sorted by cheapest return flights first.

Deals found on 13/9

Showing 1-10 of 20 results

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

Prices

Airlines

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

Currently, January is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport (average of £112). Flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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?

When flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at midday, which can drop the price by up to 44% versus a flight in the morning.

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

Related info for your journey

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 10m. British Airways provides one of the quickest options available for as low as £156. 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%), Emirates (88%), 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 £71. While the most popular route (Reykjavik Keflavik Intl - London Heathrow) can be booked for £133 on average, our data indicates £439 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, January is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to London Heathrow Airport (average of £112). Flying from Reykjavik Keflavik Intl Airport to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

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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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Cheap flights from Reykjavik Keflavik Intl Airport to London Heathrow Airport from £64

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Keflavik Intl to Heathrow

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Cheapest flights from Keflavik Intl to HeathrowExplore 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 14 September 2025.

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 14 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Reykjavik Keflavik Intl Airport to London Heathrow Airport that are best for you.

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.

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?

What is the cheapest time of day to fly from KEF to LHR?

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

Weekly flight availability 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?

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

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

Can I find deals for flights from Keflavik Intl to Heathrow that include hotel bookings?

How can I find direct flights from Keflavik Intl to Heathrow?

Can I find deals for business class flights from Keflavik Intl to Heathrow?

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

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

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

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

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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 14 September 2025.