Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £137
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 28/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
9 Sep — 16 Sep1
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 March, booked 80 days in advance, depart on a Sunday or Thursday and return on a Friday
Cheap flight deals from Heathrow to Keflavik Intl
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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 10 August 2026.
Tue 3/1107:35 -
Nonstop3h 20m
Fri 6/1118:10 -
Nonstop3h 00m
Deal found 6/8£204
Tue 27/1019:50 -
1 stop14h 55m
Thu 29/1018:05 -
1 stop27h 35m
Deal found 6/8£204
Sun 1/1107:20 -
Nonstop3h 20m
Tue 3/1111:50 -
Nonstop3h 10m
Deal found 10/8£205
Mon 2/1120:35 -
Nonstop3h 15m
Fri 13/1100:55 -
1 stop8h 40m
Deal found 6/8£207
Mon 14/920:05 -
1 stop13h 30m
Tue 29/916:10 -
2 stops17h 30m
Deal found 5/8£207
Thu 1/1021:25 -
Nonstop3h 10m
Sun 4/1007:40 -
Nonstop3h 15m
Deal found 6/8£208
Fri 2/1021:25 -
Nonstop3h 10m
Sun 4/1007:40 -
Nonstop3h 15m
Deal found 8/8£209
Tue 3/1117:30 -
1 stop17h 15m
Sun 8/1116:20 -
Nonstop3h 10m
Deal found 5/8£210
Sun 1/1120:35 -
Nonstop3h 15m
Thu 5/1116:20 -
Nonstop3h 10m
Deal found 6/8£210
Thu 24/920:55 -
1 stop11h 55m
Wed 30/920:00 -
1 stop10h 40m
Deal found 6/8£211
Thu 1/1021:25 -
Nonstop3h 10m
Fri 13/1116:20 -
Nonstop3h 10m
Deal found 6/8£212
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 10 August 2026.
Sun 1/1120:35 -
Nonstop3h 15m
Thu 5/1116:20 -
Nonstop3h 10m
Deal found 8/8£211
Tue 3/1115:45 -
2 stops19h 00m
Tue 1/1214:45 -
1 stop16h 55m
Deal found 9/8£256
Fri 27/1110:20 -
1 stop7h 00m
Mon 30/1118:05 -
1 stop15h 15m
Deal found 5/8£276
Sun 13/907:25 -
Nonstop3h 05m
Thu 24/910:40 -
Nonstop3h 10m
Deal found 10/8£362
Fri 2/1021:25 -
Nonstop3h 10m
Sun 11/1007:40 -
Nonstop3h 15m
Deal found 5/8£227
Mon 2/1120:25 -
1 stop17h 20m
Fri 6/1111:35 -
2 stops9h 15m
Deal found 9/8£268
Wed 28/1020:35 -
Nonstop3h 15m
Sun 1/1107:35 -
Nonstop3h 15m
Deal found 9/8£246
Thu 5/1119:50 -
1 stop15h 00m
Fri 13/1111:35 -
1 stop9h 45m
Deal found 7/8£300
Wed 28/1006:30 -
1 stop7h 15m
Sat 7/1117:05 -
2 stops17h 40m
Deal found 5/8£317
Wed 23/910:20 -
1 stop7h 25m
Wed 30/917:35 -
1 stop27h 05m
Deal found 6/8£334
Thu 1/1019:15 -
1 stop13h 35m
Wed 7/1011:15 -
2 stops8h 40m
Deal found 9/8£348
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 10 August 2026.
Tue 3/1107:35 -
Nonstop3h 20m
Fri 6/1118:10 -
Nonstop3h 00m
Deal found 6/8£204
Sun 1/1107:20 -
Nonstop3h 20m
Tue 3/1111:50 -
Nonstop3h 10m
Deal found 10/8£204
Thu 1/1021:25 -
Nonstop3h 10m
Sun 4/1007:40 -
Nonstop3h 15m
Deal found 6/8£208
Fri 2/1021:25 -
Nonstop3h 10m
Sun 4/1007:40 -
Nonstop3h 15m
Deal found 8/8£209
Sun 1/1120:35 -
Nonstop3h 15m
Thu 5/1116:20 -
Nonstop3h 10m
Deal found 6/8£210
Thu 1/1021:25 -
Nonstop3h 10m
Wed 7/1007:40 -
Nonstop3h 15m
Deal found 9/8£211
Thu 1/1021:25 -
Nonstop3h 10m
Fri 13/1116:20 -
Nonstop3h 10m
Deal found 6/8£212
Tue 1/921:25 -
Nonstop3h 10m
Wed 30/907:40 -
Nonstop3h 15m
Deal found 7/8£213
Sat 10/1021:25 -
Nonstop3h 10m
Sat 24/1007:40 -
Nonstop3h 15m
Deal found 6/8£213
Wed 23/921:25 -
Nonstop3h 10m
Wed 30/907:40 -
Nonstop3h 15m
Deal found 5/8£214
Last-minute flights from Heathrow to Keflavik Intl
Discover last-minute flight deals from Heathrow to Keflavik Intl. Data last updated 10 August 2026 and is based on user searches.
Tue 18/819:50 -
1 stop16h 25m
Wed 19/817:35 -
1 stop21h 25m
Deal found 5/8£215
Thu 20/817:30 -
1 stop14h 35m
Mon 24/809:10 -
1 stop23h 10m
Deal found 7/8£212
Tue 1/921:25 -
Nonstop3h 10m
Wed 30/907:40 -
Nonstop3h 15m
Deal found 7/8£213
Mon 14/920:05 -
1 stop13h 30m
Tue 29/916:10 -
2 stops17h 30m
Deal found 5/8£207
Wed 23/921:25 -
Nonstop3h 10m
Wed 30/907:40 -
Nonstop3h 15m
Deal found 5/8£214
Thu 24/920:55 -
1 stop11h 55m
Wed 30/920:00 -
1 stop10h 40m
Deal found 6/8£211
Thu 24/920:55 -
1 stop11h 55m
Fri 2/1008:50 -
1 stop11h 05m
Deal found 7/8£224
Mon 28/921:25 -
Nonstop3h 10m
Sun 4/1007:40 -
Nonstop3h 15m
Deal found 5/8£219
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 10 August 2026.
Fri 28/819:30 -
1 stop6h 05m
Deal found 6/8£137
Mon 5/1018:10 -
1 stop30h 00m
Deal found 5/8£138
Sun 6/907:25 -
Nonstop3h 05m
Deal found 7/8£139
Thu 3/907:35 -
Nonstop3h 05m
Deal found 9/8£139
Fri 6/1110:20 -
1 stop7h 00m
Deal found 9/8£140
Tue 25/807:50 -
Nonstop3h 05m
Deal found 8/8£141
Sat 31/1007:35 -
Nonstop3h 20m
Deal found 10/8£142
Wed 2/915:00 -
1 stop9h 30m
Deal found 9/8£142
Mon 7/907:40 -
Nonstop3h 05m
Deal found 10/8£143
Wed 9/915:50 -
2 stops17h 30m
Deal found 9/8£144
Sun 6/915:00 -
1 stop10h 15m
Deal found 6/8£144
Mon 21/907:40 -
Nonstop3h 05m
Deal found 6/8£145
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 10 August 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 858,174 searches. Data last updated 10 August 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
Sun 1/11
20:35-23:50
Nonstop3h 15m
Reykjavik Keflavik Intl
Thu 5/11
16:20-19:30
Nonstop3h 10m
£211
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Fri 2/10
21:25-23:35
Nonstop3h 10m
Reykjavik Keflavik Intl
Sun 11/10
07:40-11:55
Nonstop3h 15m
£227
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Wed 28/10
20:35-23:50
Nonstop3h 15m
Reykjavik Keflavik Intl
Sun 1/11
07:35-10:50
Nonstop3h 15m
£246
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Tue 3/11
15:45-10:45
2 stops19h 00m
Reykjavik Keflavik Intl
Tue 1/12
14:45-07:40
1 stop16h 55m
£256
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Mon 2/11
20:25-13:45
1 stop17h 20m
Reykjavik Keflavik Intl
Fri 6/11
11:35-20:50
2 stops9h 15m
£268
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Fri 27/11
10:20-17:20
1 stop7h 00m
Reykjavik Keflavik Intl
Mon 30/11
18:05-09:20
1 stop15h 15m
£276
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Thu 5/11
19:50-10:50
1 stop15h 00m
Reykjavik Keflavik Intl
Fri 13/11
11:35-21:20
1 stop9h 45m
£300
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Wed 28/10
06:30-13:45
1 stop7h 15m
Reykjavik Keflavik Intl
Sat 7/11
17:05-10:45
2 stops17h 40m
£317
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Wed 23/9
10:20-16:45
1 stop7h 25m
Reykjavik Keflavik Intl
Wed 30/9
17:35-21:40
1 stop27h 05m
£334
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Thu 1/10
19:15-07:50
1 stop13h 35m
Reykjavik Keflavik Intl
Wed 7/10
11:15-20:55
2 stops8h 40m
£348
Flights are sorted by cheapest return flights first.
Deals found on 9/8
Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 79 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 £150). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of £375). 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 10 August 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 £313 and £552 in November.The cheapest return price found within the last 5 days was £204 on British Airways (3 Nov–6 Nov).
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 10 August 2026.
The most flights from LHR to KEF are scheduled on a Friday (14 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (5 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 109 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 Thursday 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, British Airways have had the lowest number of delays on this route, with just 9% 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 10 August 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?
Icelandair and KLM can get you from London Heathrow Airport to Reykjavik Keflavik Intl Airport in just under 3h 15m. Your travel time can differ by up to 15h 45m. 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 £119. Additional return tickets that might be worth considering are offered by British Airways and Scandinavian Airlines, with the lowest prices starting at £131 and £167, respectively. These flights start at 53% 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 Icelandair (85%), Emirates (85%) and Air India (85%).
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 £738, our data shows the cheapest flight currently is £145. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £110 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 £150). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of £375). 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 10 August 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 858,174 searches. Data last updated 10 August 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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