Cheap flights from London Heathrow Airport to Reykjavik Keflavik Intl Airport from £54
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 23/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KEF
16 Jan — 23 Jan1
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 13 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.
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 17 December 2025.
Tue 16/1207:35LHR - KEF
Nonstop3h 20mBritish Airways
Fri 19/1218:10KEF - LHR
Nonstop3h 00mBritish Airways
Deal found 15/12£286
Wed 31/1218:05LHR - KEF
2 stops40h 40mMultiple Airlines
Sun 4/119:35KEF - LHR
3 stops38h 00mMultiple Airlines
Deal found 16/12£315
Mon 15/1207:35LHR - KEF
Nonstop3h 20mBritish Airways
Thu 18/1211:45KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 14/12£319
Mon 15/1207:35LHR - KEF
Nonstop3h 20mBritish Airways
Sun 21/1217:55KEF - LHR
Nonstop3h 00mBritish Airways
Deal found 14/12£325
Tue 16/1207:35LHR - KEF
Nonstop3h 20mBritish Airways
Thu 18/1211:45KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 15/12£326
Tue 16/1207:35LHR - KEF
Nonstop3h 20mBritish Airways
Sat 20/1211:55KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 14/12£331
Mon 15/1207:35LHR - KEF
Nonstop3h 20mBritish Airways
Fri 19/1218:10KEF - LHR
Nonstop3h 00mBritish Airways
Deal found 14/12£334
Fri 19/1207:35LHR - KEF
Nonstop3h 20mBritish Airways
Sat 27/1211:55KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 16/12£348
Mon 15/1207:35LHR - KEF
Nonstop3h 20mBritish Airways
Sat 20/1211:55KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 14/12£365
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 17 December 2025.
Sun 4/107:20LHR - KEF
Nonstop3h 20mBritish Airways
Thu 15/111:45KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 16/12£135
Thu 7/515:35LHR - KEF
1 stop16h 30mScandinavian Airlines
Thu 14/518:25KEF - LHR
1 stop14h 10mScandinavian Airlines
Deal found 14/12£157
Mon 4/521:25LHR - KEF
Nonstop3h 10mIcelandair
Sun 10/507:40KEF - LHR
Nonstop3h 15mIcelandair
Deal found 15/12£180
Sun 1/213:40LHR - KEF
Nonstop3h 25mBritish Airways
Fri 6/211:50KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 15/12£147
Tue 20/107:35LHR - KEF
Nonstop3h 20mBritish Airways
Sat 24/111:55KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 16/12£153
Tue 12/507:50LHR - KEF
Nonstop3h 05mBritish Airways
Fri 15/510:30KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 14/12£157
Fri 10/407:35LHR - KEF
Nonstop3h 05mBritish Airways
Mon 13/410:45KEF - LHR
Nonstop3h 15mBritish Airways
Deal found 15/12£161
Wed 8/407:55LHR - KEF
Nonstop3h 05mBritish Airways
Mon 13/410:45KEF - LHR
Nonstop3h 15mBritish Airways
Deal found 14/12£168
Fri 16/113:50LHR - KEF
Nonstop3h 25mBritish Airways
Sat 24/111:55KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 16/12£169
Sat 18/407:05LHR - KEF
Nonstop3h 05mBritish Airways
Sun 26/410:20KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 16/12£173
Fri 15/507:35LHR - KEF
Nonstop3h 05mBritish Airways
Mon 18/510:45KEF - LHR
Nonstop3h 15mBritish Airways
Deal found 15/12£173
Mon 4/507:40LHR - KEF
Nonstop3h 05mBritish Airways
Sun 10/510:20KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 16/12£179
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 17 December 2025.
Mon 26/120:35LHR - KEF
Nonstop3h 20mIcelandair
Thu 29/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 16/12£100
Mon 19/120:35LHR - KEF
Nonstop3h 20mIcelandair
Wed 28/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 15/12£104
Fri 23/113:50LHR - KEF
Nonstop3h 25mBritish Airways
Tue 27/111:50KEF - LHR
Nonstop3h 10mBritish Airways
Deal found 15/12£105
Fri 23/120:35LHR - KEF
Nonstop3h 20mIcelandair
Wed 28/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 15/12£108
Wed 14/120:35LHR - KEF
Nonstop3h 20mIcelandair
Sat 17/116:20KEF - LHR
Nonstop3h 10mIcelandair
Deal found 15/12£109
Wed 14/120:35LHR - KEF
Nonstop3h 20mIcelandair
Thu 29/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 15/12£110
Thu 22/120:35LHR - KEF
Nonstop3h 20mIcelandair
Fri 30/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 15/12£111
Fri 6/220:35LHR - KEF
Nonstop3h 20mIcelandair
Sun 8/207:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 16/12£114
Sat 17/120:35LHR - KEF
Nonstop3h 20mIcelandair
Wed 21/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 15/12£117
Thu 22/120:35LHR - KEF
Nonstop3h 20mIcelandair
Mon 26/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 15/12£122
Last-minute flights from Heathrow to Keflavik Intl
Discover last-minute flight deals from Heathrow to Keflavik Intl. Data last updated 17 December 2025 and is based on user searches.
Wed 14/120:35LHR - KEF
Nonstop3h 20mIcelandair
Sat 17/116:20KEF - LHR
Nonstop3h 10mIcelandair
Deal found 15/12£109
Wed 14/120:35LHR - KEF
Nonstop3h 20mIcelandair
Thu 29/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 15/12£110
Sat 17/120:35LHR - KEF
Nonstop3h 20mIcelandair
Wed 21/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 13/12£105
Mon 19/120:35LHR - KEF
Nonstop3h 20mIcelandair
Wed 28/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 15/12£104
Mon 19/120:35LHR - KEF
Nonstop3h 20mIcelandair
Fri 23/116:20KEF - LHR
Nonstop3h 10mIcelandair
Deal found 13/12£111
Mon 19/120:35LHR - KEF
Nonstop3h 20mIcelandair
Thu 22/116:20KEF - LHR
Nonstop3h 10mIcelandair
Deal found 15/12£112
Thu 22/120:35LHR - KEF
Nonstop3h 20mIcelandair
Wed 28/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 14/12£113
Fri 23/120:35LHR - KEF
Nonstop3h 20mIcelandair
Wed 28/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 15/12£108
Sat 24/120:35LHR - KEF
Nonstop3h 20mIcelandair
Sat 31/116:20KEF - LHR
Nonstop3h 10mIcelandair
Deal found 14/12£107
Mon 26/120:35LHR - KEF
Nonstop3h 20mIcelandair
Thu 29/107:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 16/12£100
Wed 28/120:35LHR - KEF
Nonstop3h 20mIcelandair
Wed 4/207:35KEF - LHR
Nonstop3h 15mIcelandair
Deal found 14/12£114
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 17 December 2025.
Fri 23/120:35LHR - KEF
Nonstop3h 20mIcelandair
Deal found 15/12£54
Tue 20/120:35LHR - KEF
Nonstop3h 20mIcelandair
Deal found 14/12£54
Sat 17/120:35LHR - KEF
Nonstop3h 20mIcelandair
Deal found 16/12£60
Sat 24/120:35LHR - KEF
Nonstop3h 20mIcelandair
Deal found 15/12£61
Tue 27/120:35LHR - KEF
Nonstop3h 20mIcelandair
Deal found 15/12£66
Mon 26/120:35LHR - KEF
Nonstop3h 20mIcelandair
Deal found 16/12£67
Tue 28/421:25LHR - KEF
Nonstop3h 10mIcelandair
Deal found 16/12£75
Fri 6/220:35LHR - KEF
Nonstop3h 20mIcelandair
Deal found 16/12£78
Mon 23/320:35LHR - KEF
Nonstop3h 20mIcelandair
Deal found 14/12£82
Mon 2/220:35LHR - KEF
Nonstop3h 20mIcelandair
Deal found 15/12£84
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 17 December 2025.
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 17 December 2025.
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
Heathrow
Fly to
Keflavik Intl
Route
Depart
Return
Price
LondonReykjavik
LHR - KEF
LHRKEF
London Heathrow
Sun 4/1
07:20-10:40
Nonstop3h 20m
Reykjavik Keflavik Intl
Thu 15/1
11:45-14:55
Nonstop3h 10m
£135
LondonReykjavik
LHR - KEF
LHRKEF
London Heathrow
Sun 1/2
13:40-17:05
Nonstop3h 25m
Reykjavik Keflavik Intl
Fri 6/2
11:50-15:00
Nonstop3h 10m
£147
LondonReykjavik
LHR - KEF
LHRKEF
London Heathrow
Tue 20/1
07:35-10:55
Nonstop3h 20m
Reykjavik Keflavik Intl
Sat 24/1
11:55-15:05
Nonstop3h 10m
£153
LondonReykjavik
LHR - KEF
LHRKEF
London Heathrow
Thu 7/5
15:35-07:05
1 stop16h 30m
Reykjavik Keflavik Intl
Thu 14/5
18:25-09:35
1 stop14h 10m
£157
LondonReykjavik
LHR - KEF
LHRKEF
London Heathrow
Tue 12/5
07:50-09:55
Nonstop3h 05m
Reykjavik Keflavik Intl
Fri 15/5
10:30-14:40
Nonstop3h 10m
£157
LondonReykjavik
LHR - KEF
LHRKEF
London Heathrow
Fri 10/4
07:35-09:40
Nonstop3h 05m
Reykjavik Keflavik Intl
Mon 13/4
10:45-15:00
Nonstop3h 15m
£161
LondonReykjavik
LHR - KEF
LHRKEF
London Heathrow
Wed 8/4
07:55-10:00
Nonstop3h 05m
Reykjavik Keflavik Intl
Mon 13/4
10:45-15:00
Nonstop3h 15m
£168
LondonReykjavik
LHR - KEF
LHRKEF
London Heathrow
Fri 16/1
13:50-17:15
Nonstop3h 25m
Reykjavik Keflavik Intl
Sat 24/1
11:55-15:05
Nonstop3h 10m
£169
LondonReykjavik
LHR - KEF
LHRKEF
London Heathrow
Sat 18/4
07:05-09:10
Nonstop3h 05m
Reykjavik Keflavik Intl
Sun 26/4
10:20-14:30
Nonstop3h 10m
£173
LondonReykjavik
LHR - KEF
LHRKEF
London Heathrow
Fri 15/5
07:35-09:40
Nonstop3h 05m
Reykjavik Keflavik Intl
Mon 18/5
10:45-15:00
Nonstop3h 15m
£173
Flights are sorted by cheapest return flights first.
Deals found on 16/12
Showing 1-10 of 22 results
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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.
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?
Use this chart to determine the optimal time to book a return flight from Heathrow to Keflavik Intl. Price data was last updated on 12 December 2025.
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 13 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 £70). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in July is currently the most expensive (average of £201). 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 17 December 2025.
It’s typically best to fly out from London Heathrow Airport to Reykjavik Keflavik Intl Airport in the afternoon. Doing so could potentially save you 39% on the flight price compared to flying at midday, which is usually more expensive.
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 17 December 2025.
The most flights from LHR to KEF are scheduled on a Monday (13 on average). You will have fewer flight options on Sunday, 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 117 minutes.
What is the most punctual flight time for London to Reykjavik flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening 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 7% 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 17 December 2025.
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.
Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
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 20m. Your travel time can differ by up to 13h 10m. 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 British Airways is currently your cheapest option to Reykjavik Keflavik Intl Airport, with prices starting at £116. Additional return tickets that might be worth considering are offered by Icelandair and Scandinavian Airlines, with the lowest prices starting at £123 and £135, respectively. These flights start at 45% 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 Japan Airlines (100%), Qatar Airways (95%) and TAP AIR PORTUGAL (95%).
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 £933, our data shows the cheapest flight currently is £99. When looking at the most popular route, (London Heathrow - Reykjavik Keflavik Intl), you can expect to pay £104 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 £70). Flying from London Heathrow Airport to Reykjavik Keflavik Intl Airport in July is currently the most expensive (average of £201). 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 17 December 2025.
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 17 December 2025.
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 17 December 2025.
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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