$179+ Cheap flights from Keflavik Intl (KEF) to Heathrow (LHR)
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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — LHR
Sep 16 — Sep 231
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Keflavik Intl to Heathrow with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Keflavik Intl to Heathrow
Cheapest
Best
Last-minute
One-way
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 August 17, 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 August 17, 2026.
This Mytrip deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/285:05 pm -
1 stop16h 30m
Sat 12/58:35 pm -
Nonstop3h 15m
Deal found 8/17![Multiple Airlines logo]()
$219
This Trip.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/285:05 pm -
1 stop23h 20m
Sat 12/510:35 am -
1 stop25h 05m
Deal found 8/17![Scandinavian Airlines logo]()
$237
This Trip.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2011:35 am -
1 stop21h 45m
Sun 11/228:35 pm -
Nonstop3h 15m
Deal found 8/13![Multiple Airlines logo]()
$244
This Gotogate deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:05 pm -
1 stop21h 55m
Sat 11/288:35 pm -
Nonstop3h 15m
Deal found 8/14![Multiple Airlines logo]()
$246
This Transavia Smart Connect deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Transavia Smart Connect is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:05 pm -
1 stop26h 20m
Sun 11/83:15 pm -
1 stop26h 00m
Deal found 8/16![Multiple Airlines logo]()
$250
This Gotogate deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/296:05 pm -
1 stop21h 55m
Sun 12/68:35 pm -
Nonstop3h 15m
Deal found 8/13![Multiple Airlines logo]()
$251
This FlightHub deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:05 pm -
1 stop21h 55m
Mon 11/307:50 pm -
1 stop15h 35m
Deal found 8/14![Scandinavian Airlines logo]()
$255
This Travelocity deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:05 pm -
1 stop15h 15m
Fri 11/277:50 pm -
1 stop20h 30m
Deal found 8/15![Scandinavian Airlines logo]()
$257
This British Airways deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:10 pm -
Nonstop3h 00m
Sun 11/227:30 am -
Nonstop3h 15m
Deal found 8/13![British Airways logo]()
$259
This Mytrip deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/74:20 pm -
Nonstop3h 10m
Mon 12/148:35 pm -
Nonstop3h 15m
Deal found 8/15![Icelandair logo]()
$260
This Mytrip deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/244:20 pm -
Nonstop3h 10m
Sat 11/288:35 pm -
Nonstop3h 15m
Deal found 8/16![Icelandair logo]()
$264
Best flights from Keflavik Intl to HeathrowDiscover carefully curated flight deals from Keflavik Intl to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 17, 2026.
Discover carefully curated flight deals from Keflavik Intl to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 17, 2026.
This British Airways deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:10 pm -
Nonstop3h 00m
Fri 11/277:35 am -
Nonstop3h 15m
Deal found 8/15![British Airways logo]()
$259
This Scandinavian Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:35 am -
1 stop6h 05m
Tue 11/177:50 pm -
1 stop14h 55m
Deal found 8/15![Scandinavian Airlines logo]()
$309
This KLM deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/132:45 pm -
1 stop16h 55m
Fri 11/205:50 pm -
1 stop19h 55m
Deal found 8/16![KLM logo]()
$420
This Expedia deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:10 pm -
1 stop23h 30m
Mon 9/289:25 pm -
Nonstop3h 10m
Deal found 8/13![Multiple Airlines logo]()
$430
This British Airways deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:45 am -
Nonstop3h 10m
Tue 11/177:35 am -
Nonstop3h 15m
Deal found 8/15![British Airways logo]()
$287
This British Airways deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/911:55 am -
Nonstop3h 10m
Tue 11/107:35 am -
Nonstop3h 15m
Deal found 8/14![British Airways logo]()
$353
This British Airways deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/110:40 am -
Nonstop3h 10m
Sun 10/47:25 am -
Nonstop3h 05m
Deal found 8/14![British Airways logo]()
$410
This British Airways deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/810:40 am -
Nonstop3h 10m
Mon 10/127:40 am -
Nonstop3h 05m
Deal found 8/14![British Airways logo]()
$434
This British Airways deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/810:40 am -
Nonstop3h 10m
Sun 10/117:25 am -
Nonstop3h 05m
Deal found 8/17![British Airways logo]()
$434
This British Airways deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/310:20 am -
Nonstop3h 05m
Sun 10/47:25 am -
Nonstop3h 05m
Deal found 8/13![British Airways logo]()
$485
Last-minute flights from Keflavik Intl to HeathrowDiscover last-minute flight deals from Keflavik Intl to Heathrow. Data last updated August 17, 2026 and is based on user searches.
Discover last-minute flight deals from Keflavik Intl to Heathrow. Data last updated August 17, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:05 pm -
1 stop27h 35m
Wed 9/169:25 pm -
Nonstop3h 10m
Deal found 8/17![Multiple Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:10 am -
1 stop17h 30m
Fri 9/188:05 pm -
1 stop13h 25m
Deal found 8/15![Multiple Airlines logo]()
$354
This Booking.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1511:15 am -
1 stop6h 35m
Thu 9/179:25 pm -
Nonstop3h 10m
Deal found 8/14![Multiple Airlines logo]()
$360
This Expedia deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/224:10 pm -
2 stops24h 30m
Mon 9/288:25 pm -
1 stop28h 45m
Deal found 8/14![Lufthansa logo]()
$307
This CheapOair deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/224:10 pm -
1 stop24h 40m
Mon 9/288:25 pm -
1 stop28h 45m
Deal found 8/14![Multiple Airlines logo]()
$311
This Mytrip deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2311:15 am -
1 stop6h 35m
Wed 9/309:25 pm -
Nonstop3h 10m
Deal found 8/17![Multiple Airlines logo]()
$304
This Booking.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2311:15 am -
1 stop6h 35m
Mon 9/289:25 pm -
Nonstop3h 10m
Deal found 8/16![Multiple Airlines logo]()
$359
This Trip.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:35 pm -
1 stop14h 45m
Fri 10/26:40 am -
1 stop26h 05m
Deal found 8/13![Scandinavian Airlines logo]()
$308
This Expedia deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/294:10 pm -
1 stop14h 45m
Tue 10/69:05 am -
1 stop15h 15m
Deal found 8/15![Multiple Airlines logo]()
$324
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 August 17, 2026.
Search for one-way flight options from Keflavik Intl to Heathrow. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:45 pm -
3 stops16h 10m
Deal found 8/17![Multiple Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/199:55 pm -
2 stops11h 20m
Deal found 8/17![Multiple Airlines logo]()
$182
This Mytrip deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:20 pm -
2 stops13h 00m
Deal found 8/15![Multiple Airlines logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:45 pm -
2 stops19h 00m
Deal found 8/13![Multiple Airlines logo]()
$184
This FlightHub deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/411:35 am -
1 stop22h 00m
Deal found 8/13![Scandinavian Airlines logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/255:35 pm -
1 stop14h 45m
Deal found 8/16![Scandinavian Airlines logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/117:35 pm -
2 stops18h 00m
Deal found 8/13![Multiple Airlines logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1711:50 pm -
1 stop8h 30m
Deal found 8/16![Multiple Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:20 pm -
2 stops13h 00m
Deal found 8/16![Multiple Airlines logo]()
$190
This Mytrip deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:20 pm -
2 stops13h 00m
Deal found 8/17![Multiple Airlines logo]()
$192
Find flight deals from Keflavik Intl to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Keflavik Intl (KEF) to Heathrow (LHR). 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 August 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $205 (Expedia) |
One-way from | $179 (Kiwi.com) |
Popular in | July |
Cheapest in | March |
Average price | $438 |
Good round-trip deal | $1,013 or less |
Good one-way deal | $289 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Keflavik Intl to Heathrow 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 2,558,603 searches. Data last updated August 17, 2026.
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
Cheapest round-trip
ReykjavikLondon
KEF Reykjavik Keflavik Intl - LHR London Heathrow
KEFLHR
Reykjavik Keflavik Intl
Fri 11/20
6:10 pm-9:10 pm
Nonstop3h 00m
London Heathrow
Fri 11/27
7:35 am-10:50 am
Nonstop3h 15m
$259
ReykjavikLondon
KEF Reykjavik Keflavik Intl - LHR London Heathrow
KEFLHR
Reykjavik Keflavik Intl
Wed 11/11
11:45 am-2:55 pm
Nonstop3h 10m
London Heathrow
Tue 11/17
7:35 am-10:50 am
Nonstop3h 15m
$287
ReykjavikLondon
KEF Reykjavik Keflavik Intl - LHR London Heathrow
KEFLHR
Reykjavik Keflavik Intl
Wed 11/11
11:35 am-5:40 pm
1 stop6h 05m
London Heathrow
Tue 11/17
7:50 pm-10:45 am
1 stop14h 55m
$309
ReykjavikLondon
KEF Reykjavik Keflavik Intl - LHR London Heathrow
KEFLHR
Reykjavik Keflavik Intl
Mon 11/9
11:55 am-3:05 pm
Nonstop3h 10m
London Heathrow
Tue 11/10
7:35 am-10:50 am
Nonstop3h 15m
$353
ReykjavikLondon
KEF Reykjavik Keflavik Intl - LHR London Heathrow
KEFLHR
Reykjavik Keflavik Intl
Thu 10/1
10:40 am-2:50 pm
Nonstop3h 10m
London Heathrow
Sun 10/4
7:25 am-9:30 am
Nonstop3h 05m
$410
ReykjavikLondon
KEF Reykjavik Keflavik Intl - LHR London Heathrow
KEFLHR
Reykjavik Keflavik Intl
Fri 11/13
2:45 pm-7:40 am
1 stop16h 55m
London Heathrow
Fri 11/20
5:50 pm-1:45 pm
1 stop19h 55m
$420
ReykjavikLondon
KEF Reykjavik Keflavik Intl - LHR London Heathrow
KEFLHR
Reykjavik Keflavik Intl
Thu 9/24
5:10 pm-5:40 pm
1 stop23h 30m
London Heathrow
Mon 9/28
9:25 pm-11:35 pm
Nonstop3h 10m
$430
ReykjavikLondon
KEF Reykjavik Keflavik Intl - LHR London Heathrow
KEFLHR
Reykjavik Keflavik Intl
Thu 10/8
10:40 am-2:50 pm
Nonstop3h 10m
London Heathrow
Mon 10/12
7:40 am-9:45 am
Nonstop3h 05m
$434
ReykjavikLondon
KEF Reykjavik Keflavik Intl - LHR London Heathrow
KEFLHR
Reykjavik Keflavik Intl
Thu 10/8
10:40 am-2:50 pm
Nonstop3h 10m
London Heathrow
Sun 10/11
7:25 am-9:30 am
Nonstop3h 05m
$434
Quickest round-trip
ReykjavikLondon
KEF Reykjavik Keflavik Intl - LHR London Heathrow
KEFLHR
Reykjavik Keflavik Intl
Sat 10/3
10:20 am-2:25 pm
Nonstop3h 05m
London Heathrow
Sun 10/4
7:25 am-9:30 am
Nonstop3h 05m
$485
Showing 1-10 of 17 resultsSorted by cheapest first
- Most accurate provider: When it comes to deals on Reykjavik Keflavik Intl Airport-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Reykjavik Keflavik Intl Airport-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Reykjavik Keflavik Intl Airport-London Heathrow Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Reykjavik Keflavik Intl Airport-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Reykjavik Keflavik Intl Airport-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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 round-trip 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?
Find hourly flight availability from Keflavik Intl to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 17, 2026.
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.
How much does it cost to fly round-trip from Reykjavik Keflavik Intl Airport to London Heathrow Airport?
Airfare is below average for this route at the moment.
Reykjavik Keflavik Intl Airport to London Heathrow Airport flights typically cost between $376 and $472 in January.The cheapest round-trip price found within the last 5 days was $205 on British Airways (Jan 15-Jan 24).
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 122 minutes.
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.
What day of the week experiences the fewest flight delays on this route?
Tuesday 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 Reykjavik to London flights?
Over the last year, Icelandair have had the lowest number of delays on this route, with just 7% of flights being delayed.
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated August 17, 2026.
Peruse reviews from past customers who have flown with Icelandair from Reykjavik Keflavik Intl Airport to London Heathrow 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.
Boarding
7.1
Crew
8.0
Comfort
6.8
Entertainment
6.8
Food
6.1
Overall
6.9
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
KEF - ORD
Boarding
7.1
Crew
8.0
Comfort
6.8
Entertainment
6.8
Food
6.1
Overall
6.9
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
KEF - ORD
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.
Traveling to a place near London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsIlford
Dorking
Winchester
Gatwick
Hounslow
Wembley
Eastleigh
Harrow
Southend-on-Sea
Watford
Northampton
Dartford
Croydon
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Complete your trip
Flights by cabin class
Heathrow flight routes
Other flight options
Other flights from Keflavik Intl
Popular flights
Complete your trip
Complete your trip to Heathrow by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Keflavik Intl to Heathrow by cabin class
Find flights from Keflavik Intl to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Heathrow
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 17, 2026.
Keflavik Intl and Heathrow flights
Browse other Keflavik Intl and Heathrow flight options. Last updated on August 17, 2026.
Other flights from Keflavik Intl
Browse through other flights departing from Keflavik Intl. Flights are based on user searches made on Cheapflights and were last updated on August 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top airline flying from Keflavik Intl to Heathrow
Discover the top airline that operate flights from Keflavik Intl to Heathrow. 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 2,558,603 searches. Data last updated August 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$244 | Average$410 | FlexibilityNo cancel fee | On-time76% |