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Cheap flights from Key West to London Heathrow Airport from £475

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 31/3. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — LHR
17 Mar — 24 Mar1
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 15 February 2026.

Tue 31/307:30
EYW
-
LHR
1 stop17h 55m
KLM
Tue 7/420:55
LHR
-
EYW
2 stops25h 35m
KLM
Deal found 14/2£475
Tue 31/318:22
EYW
-
LHR
2 stops33h 13m
United Airlines
Tue 7/412:40
LHR
-
EYW
2 stops33h 59m
United Airlines
Deal found 14/2£479
Sun 11/1014:01
EYW
-
LHR
1 stop11h 54m
British Airways
Mon 9/1108:25
LHR
-
EYW
2 stops40h 04m
British Airways
Deal found 12/2£485
Tue 31/319:42
EYW
-
LHR
1 stop10h 23m
British Airways
Tue 7/415:35
LHR
-
EYW
1 stop12h 23m
British Airways
Deal found 14/2£494
Mon 6/416:40
EYW
-
LHR
1 stop11h 25m
American Airlines
Tue 14/415:00
LHR
-
EYW
1 stop12h 58m
American Airlines
Deal found 13/2£496
Sun 11/1014:35
EYW
-
LHR
1 stop17h 40m
KLM
Fri 16/1011:15
LHR
-
EYW
1 stop13h 28m
KLM
Deal found 12/2£499
Mon 14/914:30
EYW
-
LHR
1 stop12h 50m
United Airlines
Mon 28/908:40
LHR
-
EYW
2 stops18h 31m
United Airlines
Deal found 12/2£515
Sat 4/416:38
EYW
-
LHR
1 stop34h 02m
United Airlines
Sun 12/409:30
LHR
-
EYW
2 stops34h 21m
United Airlines
Deal found 14/2£522
Mon 6/416:38
EYW
-
LHR
1 stop13h 57m
United Airlines
Tue 14/414:05
LHR
-
EYW
2 stops29h 46m
United Airlines
Deal found 13/2£528

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 15 February 2026.

Round-trip from

£475
KLM
  • KLM
  • 31/3-7/4
  • 3 total stops
  • 43h 30m 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 15 February 2026.
Use the filters below to find and compare flights from Key West to London Heathrow Airport that are best for you.

Fly from

Key West

Fly to

Heathrow

Route

Depart

Return

Price

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 31/3

07:30-06:25

1 stop17h 55m

London Heathrow

Tue 7/4

20:55-17:30

2 stops25h 35m

£475

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 31/3

18:22-08:35

2 stops33h 13m

London Heathrow

Tue 7/4

12:40-17:39

2 stops33h 59m

£479

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 31/3

19:42-11:05

1 stop10h 23m

London Heathrow

Tue 7/4

15:35-22:58

1 stop12h 23m

£494

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sat 4/4

16:38-07:40

1 stop34h 02m

London Heathrow

Sun 12/4

09:30-14:51

2 stops34h 21m

£522

Key WestLondon

EYW - LHR

EYWLHR

Key West

Mon 6/4

16:38-11:35

1 stop13h 57m

London Heathrow

Tue 14/4

14:05-14:51

2 stops29h 46m

£528

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 5/4

18:25-07:15

1 stop31h 50m

London Heathrow

Sun 12/4

17:55-13:44

2 stops24h 49m

£536

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 26/2

14:15-09:10

1 stop13h 55m

London Heathrow

Mon 2/3

11:10-17:54

2 stops35h 44m

£554

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 5/4

16:40-09:05

1 stop11h 25m

London Heathrow

Sun 12/4

08:55-18:49

1 stop14h 54m

£556

Flights are sorted by cheapest return flights first.

Deals found on 14/2

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 10h 23m. 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
Croydon
Luton
Wembley
Northampton
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Watford
Guildford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames
Ipswich
Swindon

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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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