Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £100
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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
20 Sep — 27 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 November, booked 80 days in advance, depart on a Sunday or Thursday 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 21 August 2026.
Wed 11/1107:35 -
Nonstop3h 15m
Sat 14/1116:05 -
Nonstop3h 00m
Deal found 20/8£172
Tue 17/1107:35 -
Nonstop3h 15m
Fri 20/1118:10 -
Nonstop3h 00m
Deal found 20/8£173
Wed 11/1120:15 -
1 stop18h 05m
Sat 14/1115:10 -
1 stop16h 55m
Deal found 20/8£175
Tue 3/1120:35 -
Nonstop3h 15m
Fri 6/1107:35 -
Nonstop3h 15m
Deal found 20/8£176
Thu 8/1017:30 -
1 stop14h 35m
Wed 14/1017:35 -
1 stop21h 25m
Deal found 19/8£178
Wed 4/1119:50 -
1 stop15h 20m
Sat 7/1118:05 -
1 stop15h 15m
Deal found 20/8£180
Tue 29/921:25 -
Nonstop3h 10m
Wed 7/1018:10 -
1 stop14h 25m
Deal found 18/8£181
Sat 31/1017:50 -
1 stop7h 30m
Thu 5/1115:10 -
1 stop7h 45m
Deal found 19/8£181
Sun 29/1107:30 -
Nonstop3h 15m
Sun 6/1211:50 -
Nonstop3h 10m
Deal found 19/8£182
Thu 19/1120:35 -
Nonstop3h 15m
Sun 22/1107:35 -
Nonstop3h 15m
Deal found 19/8£183
Wed 9/921:25 -
Nonstop3h 10m
Tue 22/917:05 -
1 stop15h 15m
Deal found 17/8£183
Wed 28/1019:50 -
1 stop15h 00m
Sat 7/1118:05 -
1 stop15h 15m
Deal found 17/8£184
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 21 August 2026.
Wed 10/207:35 -
Nonstop3h 15m
Sat 13/211:55 -
Nonstop3h 10m
Deal found 17/8£218
Sat 14/1110:20 -
1 stop24h 30m
Mon 16/1118:05 -
1 stop23h 35m
Deal found 16/8£261
Thu 8/1013:35 -
1 stop11h 35m
Sun 11/1000:10 -
1 stop17h 30m
Deal found 20/8£266
Tue 1/1208:40 -
2 stops8h 40m
Fri 4/1214:45 -
1 stop6h 05m
Deal found 20/8£323
Thu 1/1021:25 -
Nonstop3h 10m
Sat 10/1016:10 -
Nonstop3h 10m
Deal found 18/8£342
Tue 9/207:35 -
Nonstop3h 15m
Sun 14/211:50 -
Nonstop3h 10m
Deal found 17/8£221
Wed 10/217:00 -
1 stop17h 50m
Sat 13/211:35 -
1 stop6h 55m
Deal found 17/8£322
Wed 28/1007:35 -
Nonstop3h 15m
Sat 31/1016:05 -
Nonstop3h 00m
Deal found 18/8£313
Sat 12/910:20 -
1 stop7h 00m
Thu 17/917:10 -
1 stop15h 10m
Deal found 17/8£357
Thu 1/1010:20 -
1 stop7h 00m
Sat 10/1017:10 -
1 stop27h 30m
Deal found 19/8£389
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 21 August 2026.
Wed 11/1107:35 -
Nonstop3h 15m
Sat 14/1116:05 -
Nonstop3h 00m
Deal found 20/8£172
Thu 7/107:25 -
Nonstop3h 15m
Thu 14/111:40 -
Nonstop3h 10m
Deal found 20/8£172
Tue 17/1107:35 -
Nonstop3h 15m
Fri 20/1118:10 -
Nonstop3h 00m
Deal found 20/8£173
Sat 2/107:35 -
Nonstop3h 15m
Tue 5/111:55 -
Nonstop3h 10m
Deal found 20/8£175
Fri 22/120:35 -
Nonstop3h 15m
Sun 24/107:35 -
Nonstop3h 15m
Deal found 20/8£176
Sun 3/107:30 -
Nonstop3h 15m
Wed 6/111:45 -
Nonstop3h 10m
Deal found 20/8£177
Thu 12/1107:25 -
Nonstop3h 15m
Tue 24/1111:55 -
Nonstop3h 10m
Deal found 20/8£178
Thu 3/1210:30 -
Nonstop3h 20m
Sun 6/1211:50 -
Nonstop3h 10m
Deal found 20/8£180
Sun 29/1107:30 -
Nonstop3h 15m
Sun 6/1211:50 -
Nonstop3h 10m
Deal found 19/8£182
Thu 19/1120:35 -
Nonstop3h 15m
Sun 22/1107:35 -
Nonstop3h 15m
Deal found 19/8£183
Sun 1/1120:35 -
Nonstop3h 15m
Thu 5/1116:20 -
Nonstop3h 10m
Deal found 17/8£183
Sat 7/1120:35 -
Nonstop3h 15m
Mon 16/1107:35 -
Nonstop3h 15m
Deal found 18/8£185
Last-minute flights from Heathrow to Keflavik Intl
Discover last-minute flight deals from Heathrow to Keflavik Intl. Data last updated 21 August 2026 and is based on user searches.
Tue 1/921:25 -
Nonstop3h 10m
Fri 4/917:50 -
1 stop21h 10m
Deal found 20/8£189
Wed 2/921:25 -
Nonstop3h 10m
Tue 29/910:30 -
1 stop10h 10m
Deal found 18/8£195
Sun 6/917:00 -
1 stop17h 40m
Wed 9/917:35 -
1 stop21h 25m
Deal found 20/8£201
Tue 8/921:25 -
Nonstop3h 10m
Wed 9/917:35 -
1 stop21h 25m
Deal found 20/8£194
Wed 9/921:25 -
Nonstop3h 10m
Tue 22/917:05 -
1 stop15h 15m
Deal found 17/8£183
Wed 9/921:25 -
Nonstop3h 10m
Wed 30/920:00 -
1 stop23h 55m
Deal found 16/8£203
Mon 14/920:05 -
1 stop13h 30m
Tue 22/916:10 -
1 stop14h 45m
Deal found 17/8£192
Tue 15/916:25 -
1 stop8h 45m
Tue 22/916:10 -
1 stop14h 45m
Deal found 17/8£188
Wed 16/921:25 -
Nonstop3h 10m
Wed 23/917:35 -
1 stop21h 25m
Deal found 17/8£198
Mon 28/921:25 -
Nonstop3h 10m
Wed 7/1018:10 -
1 stop14h 25m
Deal found 17/8£200
Tue 29/921:25 -
Nonstop3h 10m
Wed 7/1018:10 -
1 stop14h 25m
Deal found 18/8£181
Wed 30/921:25 -
Nonstop3h 10m
Wed 7/1011:15 -
1 stop6h 35m
Deal found 16/8£197
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 21 August 2026.
Tue 3/1117:30 -
1 stop17h 40m
Deal found 20/8£100
Sat 5/915:35 -
1 stop18h 35m
Deal found 20/8£101
Tue 8/1219:50 -
1 stop15h 20m
Deal found 20/8£106
Fri 30/1019:50 -
1 stop20h 30m
Deal found 19/8£108
Thu 10/907:35 -
Nonstop3h 05m
Deal found 19/8£109
Thu 10/919:50 -
1 stop12h 15m
Deal found 19/8£111
Tue 1/917:30 -
1 stop17h 55m
Deal found 18/8£112
Fri 28/807:35 -
Nonstop3h 05m
Deal found 17/8£112
Fri 6/1110:20 -
1 stop7h 00m
Deal found 20/8£113
Sun 22/1106:40 -
1 stop10h 40m
Deal found 17/8£114
Wed 18/1106:30 -
1 stop7h 15m
Deal found 17/8£114
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 21 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 7,457,451 searches. Data last updated 21 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
Wed 10/2
07:35-10:50
Nonstop3h 15m
Reykjavik Keflavik Intl
Sat 13/2
11:55-15:05
Nonstop3h 10m
£218
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Tue 9/2
07:35-10:50
Nonstop3h 15m
Reykjavik Keflavik Intl
Sun 14/2
11:50-15:00
Nonstop3h 10m
£221
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Sat 14/11
10:20-10:50
1 stop24h 30m
Reykjavik Keflavik Intl
Mon 16/11
18:05-17:40
1 stop23h 35m
£261
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Thu 8/10
13:35-00:10
1 stop11h 35m
Reykjavik Keflavik Intl
Sun 11/10
00:10-18:40
1 stop17h 30m
£266
Fastest return journey
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Wed 28/10
07:35-10:50
Nonstop3h 15m
Reykjavik Keflavik Intl
Sat 31/10
16:05-19:05
Nonstop3h 00m
£313
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Wed 10/2
17:00-10:50
1 stop17h 50m
Reykjavik Keflavik Intl
Sat 13/2
11:35-18:30
1 stop6h 55m
£322
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Tue 1/12
08:40-17:20
2 stops8h 40m
Reykjavik Keflavik Intl
Fri 4/12
14:45-20:50
1 stop6h 05m
£323
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Thu 1/10
21:25-23:35
Nonstop3h 10m
Reykjavik Keflavik Intl
Sat 10/10
16:10-20:20
Nonstop3h 10m
£342
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Sat 12/9
10:20-16:20
1 stop7h 00m
Reykjavik Keflavik Intl
Thu 17/9
17:10-09:20
1 stop15h 10m
£357
LondonReykjavik
LHR London Heathrow - KEF Reykjavik Keflavik Intl
LHRKEF
London Heathrow
Thu 1/10
10:20-16:20
1 stop7h 00m
Reykjavik Keflavik Intl
Sat 10/10
17:10-21:40
1 stop27h 30m
£389
Flights are sorted by cheapest return flights first.
Deals found on 18/8
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
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 £151). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of £371). 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 21 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 £282 and £429 in November.The cheapest return price found within the last 5 days was £172 on British Airways (11 Nov–14 Nov).
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 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 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 21 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?
British Airways and Scandinavian Airlines 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 21h 15m. 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 £117. Additional return tickets that might be worth considering are offered by British Airways and Scandinavian Airlines, with the lowest prices starting at £130 and £165, 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 (81%), Emirates (81%) and Air India (81%).
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 £194. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £109 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 £151). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in August is currently the most expensive (average of £371). 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 21 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 7,457,451 searches. Data last updated 21 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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