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Cheap flights from Key West to London Heathrow Airport from £407

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 24/5. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — LHR
1 May — 8 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Key West to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Key West to Heathrow
Explore the most affordable flight options available from Key West to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 April 2026.

Tue 10/1116:05
EYW
-
LHR
2 stops44h 00m
United Airlines
Fri 13/1111:10
LHR
-
EYW
2 stops32h 56m
United Airlines
Deal found 31/3£567
Tue 8/911:26
EYW
-
LHR
1 stop14h 29m
American Airlines
Thu 8/1006:10
LHR
-
EYW
2 stops17h 14m
American Airlines
Deal found 31/3£661
Tue 8/914:35
EYW
-
LHR
1 stop17h 40m
Delta
Thu 8/1011:15
LHR
-
EYW
1 stop13h 28m
Delta
Deal found 31/3£677
Tue 8/913:22
EYW
-
LHR
1 stop12h 28m
Multiple Airlines
Thu 8/1009:55
LHR
-
EYW
1 stop13h 29m
Multiple Airlines
Deal found 30/3£678
Wed 13/515:58
EYW
-
LHR
1 stop15h 37m
British Airways
Wed 20/506:15
LHR
-
EYW
2 stops21h 43m
British Airways
Deal found 29/3£692
Wed 13/518:19
EYW
-
LHR
2 stops16h 56m
KLM
Wed 20/511:45
LHR
-
EYW
2 stops34h 38m
KLM
Deal found 29/3£698
Mon 27/414:40
EYW
-
LHR
1 stop17h 35m
KLM
Tue 5/506:30
LHR
-
EYW
2 stops18h 10m
KLM
Deal found 30/3£701
Mon 27/407:33
EYW
-
LHR
2 stops19h 22m
Delta
Tue 5/506:30
LHR
-
EYW
2 stops18h 10m
Delta
Deal found 30/3£705

Find flight deals from Key West to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Key West (EYW) 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 1 April 2026.

Round-trip from

£661

One-way from

£407
American Airlines
  • American Airlines
  • 8/9-8/10
  • 3 total stops
  • 31h 43m total
  • Key West to London
Search Deals
24/5
  • 24/5
  • 3 total stops
  • 47h 56m total
  • Key West to London
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Key West 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 858,174 searches. Data last updated 1 April 2026.
Use the filters below to find and compare flights from Key West to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 13/5

11:48-06:25

1 stop13h 37m

London Heathrow

Wed 20/5

11:15-19:49

1 stop13h 34m

£708

Key WestLondon

EYW - LHR

EYWLHR

Key West

Mon 27/4

14:35-10:40

2 stops15h 05m

London Heathrow

Tue 5/5

14:05-15:07

2 stops30h 02m

£712

Key WestLondon

EYW - LHR

EYWLHR

Key West

Mon 13/7

07:45-07:10

2 stops18h 25m

London Heathrow

Wed 22/7

17:35-17:23

2 stops28h 48m

£851

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 16/7

07:45-07:15

1 stop18h 30m

London Heathrow

Thu 6/8

06:30-19:51

2 stops18h 21m

£879

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 16/7

16:00-06:30

2 stops57h 30m

London Heathrow

Thu 6/8

16:40-13:30

2 stops25h 50m

£881

Key WestLondon

EYW - LHR

EYWLHR

Key West

Mon 15/6

13:39-06:55

1 stop12h 16m

London Heathrow

Mon 13/7

20:00-19:06

2 stops28h 06m

£1,033
Cheapest one-way

Key WestLondon

EYW - LHR

EYWLHR

Key West

Fri 22/5

12:07-08:55

3 stops39h 48m

£425
Fastest single journey

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 24/5

19:40-12:35

1 stop11h 55m

£584

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 24/5

18:19-14:35

2 stops15h 16m

£587

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 10/6

13:39-12:35

1 stop17h 56m

£591

Flights are sorted by cheapest return flights first.

Deals found on 29/3

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Best time to book a flight from Key West to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Key West 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.

Related info for your journey

Find useful and relevant information for your journey from Key West to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Key West to London Heathrow?

    Key West (EYW), located 2.6 mi from the city center, is the airport you fly out of when you book flights from Key West to London Heathrow. 0 airlines have flights from Key West to London Heathrow on a regular basis. Booking flights from Key West to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

  • How long is the flight from Key West to London Heathrow Airport?

    Departing from Key West to London Heathrow Airport will take you 13h 37m. The distance from Key West to London Heathrow Airport is about 4539 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Key West to Heathrow that include hotel bookings?

    Yes. In addition to deals on Key West to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Key West to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key West to Heathrow.

  • Can I find deals for business class flights from Key West to Heathrow?

    Yes. Cheapflights offers flight deals from Key West to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Wembley
Croydon
Northampton
Hounslow
Gatwick
Slough
Ilford
Luton
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Bedford
Chelmsford

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How does Cheapflights help users find flights from Key West to Heathrow?

Deals for Key West to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Key West to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow from Key West 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 Key West to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Key West? 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 Key West to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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