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Cheap flights from Key West to London Heathrow Airport from £576

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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — LHR
16 May — 23 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 16 April 2026.

Tue 12/518:19
EYW
-
LHR
1 stop13h 56m
Delta
Tue 19/506:30
LHR
-
EYW
2 stops15h 53m
Delta
Deal found 11/4£684
Wed 19/814:35
EYW
-
LHR
2 stops15h 05m
Virgin Atlantic
Wed 26/806:30
LHR
-
EYW
2 stops18h 15m
Virgin Atlantic
Deal found 13/4£688
Mon 11/507:30
EYW
-
LHR
1 stop18h 45m
Delta
Tue 19/506:15
LHR
-
EYW
2 stops16h 08m
Delta
Deal found 11/4£690
Wed 19/818:00
EYW
-
LHR
1 stop12h 20m
KLM
Wed 26/809:20
LHR
-
EYW
1 stop15h 25m
KLM
Deal found 13/4£705
Tue 12/518:19
EYW
-
LHR
1 stop13h 56m
Delta
Mon 18/506:30
LHR
-
EYW
2 stops15h 53m
Delta
Deal found 11/4£721
Mon 11/507:30
EYW
-
LHR
1 stop18h 45m
Delta
Sun 17/506:15
LHR
-
EYW
2 stops16h 08m
Delta
Deal found 11/4£727
Mon 18/507:30
EYW
-
LHR
2 stops16h 50m
Delta
Tue 26/506:30
LHR
-
EYW
2 stops15h 53m
Delta
Deal found 11/4£733
Sat 9/515:58
EYW
-
LHR
1 stop14h 07m
American Airlines
Wed 20/512:00
LHR
-
EYW
1 stop15h 36m
American Airlines
Deal found 11/4£742
Sat 9/514:15
EYW
-
LHR
1 stop13h 35m
Delta
Sat 16/506:30
LHR
-
EYW
2 stops15h 53m
Delta
Deal found 11/4£758
Wed 15/407:33
EYW
-
LHR
1 stop18h 42m
Delta
Wed 22/406:30
LHR
-
EYW
2 stops15h 53m
Delta
Deal found 11/4£759
Thu 14/514:49
EYW
-
LHR
1 stop11h 26m
United Airlines
Tue 19/514:10
LHR
-
EYW
2 stops28h 35m
United Airlines
Deal found 11/4£761

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 16 April 2026.

Round-trip from

£684

One-way from

£576
Delta
  • Delta
  • 12/5-19/5
  • 3 total stops
  • 29h 49m total
  • Key West to London
Search Deals
British Airways
  • British Airways
  • 10/6
  • 1 total stop
  • 14h 46m 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 16 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

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 19/8

14:35-10:40

2 stops15h 05m

London Heathrow

Wed 26/8

06:30-19:45

2 stops18h 15m

£688
Fastest return journey

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 19/8

18:00-11:20

1 stop12h 20m

London Heathrow

Wed 26/8

09:20-19:45

1 stop15h 25m

£705

Key WestLondon

EYW - LHR

EYWLHR

Key West

Mon 13/7

07:45-06:20

2 stops17h 35m

London Heathrow

Wed 22/7

20:05-13:29

2 stops22h 24m

£837

Key WestLondon

EYW - LHR

EYWLHR

Key West

Mon 13/7

14:24-11:20

1 stop15h 56m

London Heathrow

Wed 22/7

15:15-19:51

1 stop33h 36m

£842

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 16/6

07:45-06:25

1 stop17h 40m

London Heathrow

Fri 17/7

09:20-19:51

1 stop15h 31m

£1,009
Cheapest one-way
Fastest single journey

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 10/6

19:40-12:35

1 stop11h 55m

£576

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 10/6

11:58-07:10

2 stops14h 12m

£576

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 10/6

07:45-09:20

3 stops20h 35m

£2,214

Flights are sorted by cheapest return flights first.

Deals found on 11/4

Sorted by cheapest first

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 12h 20m. 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
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Chelmsford
Ipswich
Southend-on-Sea

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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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