Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £82
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
18 Oct — 25 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Reykjavik Keflavik Intl are usually found in January or November, booked 42 days in advance, depart on a Sunday or Saturday and return on a Friday
Cheap flight deals from Heathrow to Keflavik Intl
Enter your travel dates to find the best prices.
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One-way
Cheapest flights from Heathrow to Keflavik Intl
Explore the most affordable flight options available from Heathrow to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2026.
Thu 3/1220:35 -
Nonstop3h 15m
Mon 7/1207:35 -
Nonstop3h 15m
Deal found 18/9£130
Fri 13/1120:35 -
Nonstop3h 15m
Sun 15/1107:35 -
Nonstop3h 15m
Deal found 17/9£132
Tue 10/1120:35 -
Nonstop3h 15m
Tue 17/1107:35 -
Nonstop3h 15m
Deal found 16/9£132
Thu 12/1120:35 -
Nonstop3h 15m
Sun 15/1107:35 -
Nonstop3h 15m
Deal found 13/9£133
Fri 13/1120:35 -
Nonstop3h 15m
Mon 16/1107:35 -
Nonstop3h 15m
Deal found 14/9£135
Wed 18/1120:35 -
Nonstop3h 15m
Sun 22/1107:35 -
Nonstop3h 15m
Deal found 15/9£135
Fri 6/1120:35 -
Nonstop3h 15m
Sun 15/1107:35 -
Nonstop3h 15m
Deal found 16/9£136
Thu 3/1220:35 -
Nonstop3h 15m
Sat 12/1216:20 -
Nonstop3h 10m
Deal found 17/9£137
Sat 28/1120:35 -
Nonstop3h 15m
Mon 30/1107:35 -
Nonstop3h 15m
Deal found 18/9£138
Best flights from Heathrow to Keflavik Intl
Discover carefully curated flight deals from Heathrow to Keflavik Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2026.
Wed 28/1006:40 -
1 stop10h 40m
Sat 7/1118:05 -
1 stop15h 15m
Deal found 18/9£227
Sat 28/1106:30 -
1 stop7h 15m
Tue 1/1211:55 -
2 stops8h 55m
Deal found 15/9£295
Thu 8/1007:35 -
Nonstop3h 05m
Wed 21/1011:00 -
Nonstop3h 10m
Deal found 17/9£331
Sat 3/1021:25 -
Nonstop3h 10m
Wed 7/1007:40 -
Nonstop3h 15m
Deal found 18/9£349
Tue 3/1117:30 -
1 stop17h 40m
Fri 6/1118:05 -
1 stop15h 15m
Deal found 15/9£233
Wed 7/1010:20 -
1 stop7h 25m
Mon 19/1011:15 -
1 stop9h 20m
Deal found 16/9£254
Mon 30/1106:30 -
1 stop7h 15m
Sun 6/1211:35 -
2 stops9h 15m
Deal found 17/9£303
Mon 7/1206:30 -
2 stops10h 50m
Thu 10/1214:45 -
1 stop6h 05m
Deal found 13/9£308
Wed 7/1021:25 -
Nonstop3h 10m
Mon 19/1007:40 -
Nonstop3h 15m
Deal found 16/9£351
Sat 7/1116:25 -
1 stop21h 20m
Tue 10/1111:55 -
2 stops8h 55m
Deal found 13/9£310
Mon 14/1206:30 -
1 stop7h 15m
Thu 17/1211:55 -
2 stops8h 55m
Deal found 13/9£368
Direct flights from Heathrow to Keflavik Intl
Explore direct flight options from Heathrow to Keflavik Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 September 2026.
Thu 3/1220:35 -
Nonstop3h 15m
Mon 7/1207:35 -
Nonstop3h 15m
Deal found 18/9£130
Fri 13/1120:35 -
Nonstop3h 15m
Sun 15/1107:35 -
Nonstop3h 15m
Deal found 17/9£132
Tue 10/1120:35 -
Nonstop3h 15m
Tue 17/1107:35 -
Nonstop3h 15m
Deal found 16/9£132
Thu 12/1120:35 -
Nonstop3h 15m
Sun 15/1107:35 -
Nonstop3h 15m
Deal found 13/9£133
Fri 13/1120:35 -
Nonstop3h 15m
Mon 16/1107:35 -
Nonstop3h 15m
Deal found 14/9£135
Wed 18/1120:35 -
Nonstop3h 15m
Sun 22/1107:35 -
Nonstop3h 15m
Deal found 15/9£135
Fri 6/1120:35 -
Nonstop3h 15m
Sun 15/1107:35 -
Nonstop3h 15m
Deal found 16/9£136
Thu 3/1220:35 -
Nonstop3h 15m
Fri 11/1216:20 -
Nonstop3h 10m
Deal found 18/9£137
Sat 28/1120:35 -
Nonstop3h 15m
Mon 30/1107:35 -
Nonstop3h 15m
Deal found 18/9£138
Last-minute flights from Heathrow to Keflavik Intl
Discover last-minute flight deals from Heathrow to Keflavik Intl. Data last updated 18 September 2026 and is based on user searches.
Thu 15/1016:25 -
1 stop8h 45m
Tue 20/1016:10 -
1 stop14h 45m
Deal found 15/9£159
Thu 15/1016:25 -
1 stop8h 45m
Tue 20/1016:10 -
2 stops17h 30m
Deal found 15/9£174
Wed 28/1019:50 -
1 stop15h 20m
Tue 3/1118:05 -
1 stop15h 15m
Deal found 17/9£176
Thu 29/1006:40 -
1 stop10h 40m
Wed 4/1111:55 -
1 stop21h 40m
Deal found 17/9£191
Sat 31/1011:45 -
Nonstop3h 20m
Sat 7/1116:05 -
Nonstop3h 00m
Deal found 14/9£166
One-way flights from Heathrow to Keflavik Intl
Search for one-way flight options from Heathrow to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated 18 September 2026.
Fri 27/1120:35 -
Nonstop3h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 18/9£82
Tue 15/1220:35 -
Nonstop3h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 16/9£83
Wed 18/1118:50 -
2 stops39h 00m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 16/9£85
Wed 30/921:25 -
Nonstop3h 10m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 15/9£86
Fri 13/1120:35 -
Nonstop3h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 16/9£87
Thu 12/1115:30 -
2 stops18h 20m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 16/9£90
Sun 15/1107:30 -
Nonstop3h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 13/9£91
Mon 16/1107:35 -
Nonstop3h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 14/9£92
Sun 8/1107:30 -
Nonstop3h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 15/9£93
Thu 19/1120:35 -
Nonstop3h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 17/9£93
Tue 10/1107:35 -
Nonstop3h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 15/9£94
Tue 17/1120:35 -
Nonstop3h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 16/9£95
Find flight deals from Heathrow to Keflavik Intl
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Keflavik Intl (KEF). 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 18 September 2026.
Customise your flight search to find flights from Heathrow to Keflavik Intl 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 7,457,451 searches. Data last updated 18 September 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Tue 17/11
20:35-23:50
Nonstop3h 15m
Reykjavik Keflavik Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£95
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Sat 31/10
07:35-10:50
Nonstop3h 15m
Reykjavik Keflavik Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£96
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Sun 8/11
15:15-17:15
1 stop26h 00m
Reykjavik Keflavik Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£100
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Mon 9/11
07:35-10:50
Nonstop3h 15m
Reykjavik Keflavik Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£112
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Thu 10/12
06:40-17:20
1 stop10h 40m
Reykjavik Keflavik Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£124
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Mon 9/11
06:30-00:15
1 stop17h 45m
Reykjavik Keflavik Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£132
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Sat 3/10
15:00-00:20
1 stop10h 20m
Reykjavik Keflavik Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£157
Fastest return journey
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Wed 14/10
07:55-10:00
Nonstop3h 05m
Reykjavik Keflavik Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£162
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Tue 22/9
07:50-09:55
Nonstop3h 05m
Reykjavik Keflavik Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£174
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Sat 31/10
16:25-11:40
2 stops19h 15m
Reykjavik Keflavik Intl
Wed 31/12
00:00-01:00
Nonstop0h 00m
£188
Flights are sorted by cheapest return flights first.
Deals found on 16/9
Showing 1-10 of 21 resultsSorted by cheapest first
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Best time to book a flight from Heathrow to Keflavik Intl
Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl from Heathrow with our price prediction graph.
LHR-KEF
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 London Heathrow Airport to Reykjavik Keflavik Intl Airport
Prices
Airlines
Delays
How far ahead should I book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?
The price you pay for your flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 41 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport?
Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of £154). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of £378). 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 LHR to KEF?
Find hourly flight availability from Heathrow to Keflavik Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2026.
When flying from London Heathrow Airport to Reykjavik Keflavik Intl 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 London Heathrow Airport to Reykjavik Keflavik Intl Airport?
Airfare is below average for this route at the moment.
London Heathrow Airport to Reykjavik Keflavik Intl Airport flights typically cost between £259 and £328 in December.The cheapest return price found within the last 5 days was £131 on Icelandair (3 Dec–7 Dec).
Weekly flight availability from London Heathrow Airport to Reykjavik Keflavik Intl Airport
Explore weekly flight availability from Heathrow to Keflavik Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 18 September 2026.
The most flights from LHR to KEF are scheduled on a Wednesday (14 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).
How often are flights from London to Reykjavik delayed?
About 10% of weekly flights between London and Reykjavik have experienced delays in the past year, with the average delay time being 106 minutes.
What is the most punctual flight time for London to Reykjavik flights?
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Monday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on London to Reykjavik flights?
Over the past year, Icelandair have had the lowest number of delays on this route, with just 10% of flights being delayed.
Reviews of airlines servicing Keflavik Intl
Get insights into the airlines that provide service to Keflavik Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Keflavik Intl. Reviews last updated 18 September 2026.
Check out reviews from past customers who have flown with Scandinavian Airlines,Icelandair, andBritish Airways from London Heathrow Airport to Reykjavik Keflavik Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(
Related info for your journey
Find useful and relevant information for your journey from Heathrow to Keflavik Intl. 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 London Heathrow Airport to Reykjavik Keflavik Intl Airport?
Scandinavian Airlines and KLM can get you from London Heathrow Airport to Reykjavik Keflavik Intl Airport in just under 7h 15m. Your travel time can differ by up to 3h 25m. There are 1177 mi between London Heathrow Airport and Reykjavik Keflavik Intl Airport. This flight may include one or multiple stops.
What are the cheapest airlines flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport round-trip?
Flying on Icelandair is currently your cheapest option to Reykjavik Keflavik Intl Airport, with prices starting at £120. Additional return tickets that might be worth considering are offered by British Airways and Scandinavian Airlines, with the lowest prices starting at £134 and £168, respectively. These flights start at 54% lower than the current average price 3 months from now.
What are the most reliable airlines from London Heathrow Airport to Reykjavik Keflavik Intl Airport?
The top 3 most reliable airlines when flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport are Emirates (84%), Air India (84%) and TAP AIR PORTUGAL (84%).
What are the cheapest flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport?
While on average a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport is generally £677, our data shows the cheapest flight currently is £126. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £131 for that flight.
Can I find deals for business class flights from Heathrow to Keflavik Intl?
Yes. Cheapflights offers flight deals from Heathrow to Keflavik Intl 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 London Heathrow Airport to Reykjavik Keflavik Intl Airport?
Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Reykjavik Keflavik Intl Airport (average of £154). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of £378). 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.
Explore flights to Keflavik Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 18 September 2026.
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 18 September 2026.
Top 3 airlines flying from Heathrow to Keflavik Intl
Discover the top 3 airlines that operate flights from Heathrow to Keflavik Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated 18 September 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Heathrow to Keflavik Intl?
When you search for this flight from Heathrow to Keflavik Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from Heathrow to Keflavik Intl?
Cheapflights helps you find that perfect flight to Keflavik Intl from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Heathrow to Keflavik Intl with no change fees?
Need flexible booking options for your flight to Keflavik Intl from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from Heathrow to Keflavik Intl become cheaper?
Yes! Start tracking prices for Heathrow to Keflavik Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.
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