What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

What is the most punctual flight time for Reykjavik to London flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

Which airline has the best punctuality record on Reykjavik to London flights?

Over the past year, Icelandair have had the lowest number of delays on this route, with just 8% of flights being delayed.

How often are flights from Reykjavik to London delayed?

About 9% of weekly flights between Reykjavik and London have experienced delays in the past year, with the average delay time being 117 minutes.

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

The most flights from KEF to LHR are scheduled on a Monday (12 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 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: Japan Airlines (100%), Qantas Airways (95%), Qatar Airways (91%).

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.

£85+ Cheap Flights from Reykjavik Keflavik Intl Airport to London Heathrow Airport

Cheap flight deals from Keflavik Intl to Heathrow

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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 7 April 2026.

Fri 24/410:30

KEF

LHR

Nonstop3h 10m

British Airways

Sun 26/407:25

LHR

KEF

Nonstop3h 05m

British Airways

Deal found 2/4£148

Wed 29/411:00

KEF

LHR

Nonstop3h 10m

British Airways

Sun 3/507:25

LHR

KEF

Nonstop3h 05m

British Airways

Deal found 3/4£155

Thu 23/410:40

KEF

LHR

Nonstop3h 10m

British Airways

Thu 30/407:35

LHR

KEF

Nonstop3h 05m

British Airways

Deal found 2/4£168

Fri 24/417:35

KEF

LHR

1 stop14h 45m

Multiple Airlines

Sun 26/407:25

LHR

KEF

Nonstop3h 05m

Multiple Airlines

Deal found 4/4£183

Wed 29/420:00

KEF

LHR

1 stop10h 40m

Multiple Airlines

Sat 30/521:25

LHR

KEF

Nonstop3h 10m

Multiple Airlines

Deal found 5/4£185

Find flight deals from Keflavik Intl to Heathrow

Round-trip from	£148
One-way from	£85
Popular in	July
Cheapest in	January
Average price	£366
Good one-way deal	£184 or less

British Airways
24/4-26/4
Nonstop
6h 15m total
Reykjavik to London

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KLM
4/6
1 total stop
11h 25m total
Reykjavik to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£46 potential increase over avg. return price).

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Cheapest flight prices on average. 4% potential price decrease (£9 potential savings vs. average return price).

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Average for round-trip flights in April 2026

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Price to beat on a one-way flight from Reykjavik Keflavik Intl to London Heathrow.

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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

Cheapest return flight

Fastest return journey

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Sat 2/5

10:20-14:25

Nonstop3h 05m

London Heathrow

Sun 3/5

07:25-09:30

Nonstop3h 05m

£188

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 24/4

10:30-14:40

Nonstop3h 10m

London Heathrow

Sun 26/4

07:25-09:30

Nonstop3h 05m

£190

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 3/9

19:15-07:40

1 stop11h 25m

London Heathrow

Thu 17/9

20:55-07:50

1 stop11h 55m

£220

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 30/4

10:40-14:50

Nonstop3h 10m

London Heathrow

Sun 3/5

07:25-09:30

Nonstop3h 05m

£224

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 1/5

10:30-14:40

Nonstop3h 10m

London Heathrow

Sun 3/5

07:25-09:30

Nonstop3h 05m

£252

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Wed 13/5

11:00-15:10

Nonstop3h 10m

London Heathrow

Wed 20/5

07:55-10:00

Nonstop3h 05m

£268

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 1/5

16:10-20:20

Nonstop3h 10m

London Heathrow

Sun 31/5

21:25-23:35

Nonstop3h 10m

£283

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Fri 15/5

07:55-14:35

1 stop5h 40m

London Heathrow

Mon 18/5

19:50-10:25

1 stop15h 35m

£286

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 3/9

10:40-14:50

Nonstop3h 10m

London Heathrow

Sun 6/9

07:25-09:30

Nonstop3h 05m

£290

ReykjavikLondon

KEF - LHR

KEFLHR

Reykjavik Keflavik Intl

Thu 21/5

19:15-09:00

1 stop12h 45m

London Heathrow

Thu 28/5

20:55-07:45

1 stop11h 50m

£295

Flights are sorted by cheapest return flights first.

Deals found on 5/4

Showing 1-10 of 22 resultsSorted by cheapest first

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.

KEF-LHR

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

Delays

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 decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 05m. British Airways provides one of the quickest options available for as low as £188. 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 (100%), Qantas Airways (95%), Qatar Airways (91%).
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 £110. While the most popular route (Reykjavik Keflavik Intl - London Heathrow) can be booked for £155 on average, our data indicates £207 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.

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Cheap flights from Reykjavik Keflavik Intl Airport to London Heathrow Airport from £85

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 4/6. 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

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 7 April 2026.

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 7 April 2026.

Best flights from Keflavik Intl to HeathrowDiscover 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 7 April 2026.

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 7 April 2026.

Direct flights from Keflavik Intl to HeathrowExplore 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 7 April 2026.

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 7 April 2026.

Last-minute flights from Keflavik Intl to HeathrowDiscover last-minute flight deals from Keflavik Intl to Heathrow. Data last updated 7 April 2026 and is based on user searches.

Discover last-minute flight deals from Keflavik Intl to Heathrow. Data last updated 7 April 2026 and is based on user searches.

One-way flights from Keflavik Intl to HeathrowSearch for one-way flight options from Keflavik Intl to Heathrow. Find affordable one-way fares based on user searches. Data last updated 7 April 2026.

Search for one-way flight options from Keflavik Intl to Heathrow. Find affordable one-way fares based on user searches. Data last updated 7 April 2026.

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Best time to book a flight from Keflavik Intl to Heathrow

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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?

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

How often are flights from Reykjavik to London delayed?

What is the most punctual flight time for Reykjavik to London flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on Reykjavik to London flights?

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?

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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 7 April 2026.

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 7 April 2026.

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 7 April 2026.

Last-minute flights from Keflavik Intl to Heathrow
Discover last-minute flight deals from Keflavik Intl to Heathrow. Data last updated 7 April 2026 and is based on user searches.

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 7 April 2026.