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Cheap flights from Key West to London Heathrow Airport from £541

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — LHR
11 Dec — 18 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 11 November 2025.

Sun 7/1207:40EYW - LHR
1 stop19h 10mDelta
Sun 14/1210:45LHR - EYW
1 stop14h 21mDelta
Deal found 10/11£567
Sun 7/1214:47EYW - LHR
1 stop13h 23mUnited Airlines
Sun 14/1216:20LHR - EYW
2 stops26h 31mUnited Airlines
Deal found 9/11£676
Sun 7/1213:33EYW - LHR
2 stops17h 07mMultiple Airlines
Sun 14/1206:05LHR - EYW
2 stops18h 30mMultiple Airlines
Deal found 9/11£784

Cheap 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 11 November 2025.

Round-trip from

£497
American Airlines
  • American Airlines
  • 1/2-10/2
  • 2 total stops
  • 29h 18m total
  • Key West to London
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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 11 November 2025.
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

Wed 22/4

14:35-13:30

1 stop17h 55m

London Heathrow

Wed 29/4

06:15-19:44

2 stops18h 29m

£541

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 1/2

07:10-06:25

1 stop18h 15m

London Heathrow

Tue 10/2

06:20-19:42

2 stops18h 22m

£548

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 22/4

14:02-12:00

1 stop16h 58m

London Heathrow

Wed 29/4

09:55-18:21

1 stop13h 26m

£555

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 22/4

16:02-18:15

2 stops21h 13m

London Heathrow

Wed 29/4

20:00-18:21

2 stops27h 21m

£560

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 7/12

15:02-09:00

1 stop12h 58m

London Heathrow

Sun 14/12

10:45-20:06

1 stop14h 21m

£567

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 7/12

07:40-07:50

1 stop19h 10m

London Heathrow

Sun 14/12

10:45-20:06

1 stop14h 21m

£567

Key WestLondon

EYW - LHR

EYWLHR

Key West

Fri 27/3

18:00-09:00

1 stop11h 00m

London Heathrow

Tue 31/3

10:55-19:44

1 stop13h 49m

£583

Key WestLondon

EYW - LHR

EYWLHR

Key West

Fri 27/3

18:00-09:00

1 stop11h 00m

London Heathrow

Tue 31/3

10:55-19:44

1 stop13h 49m

£583

Flights are sorted by cheapest return flights first.

Deals found on 9/11

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 16h 58m. 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
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Swindon
Crawley
Brentford
Romford
Chichester
Ipswich

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Fly with Cheapflights

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 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?

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