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Cheap flights from Key West to London Heathrow Airport from £464

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — LHR
27 Aug — 3 Sep1
1 adult

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 22 August 2025.

Round-trip from

£545

Popular in

October

Cheapest in

November

Average price

£757
British Airways
  • British Airways
  • 11/12-14/12
  • 3 total stops
  • 49h 05m total
  • Key West to London
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High demand for flights, 5% potential price rise
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Cheapest flight prices on average. 6% potential price decrease (£35 potential savings vs. average return price).
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Average for round-trip flights in August 2025
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Find flight deals from Key West to Heathrow

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 22 August 2025.

Thu 11/1214:35EYW - LHR
1 stop12h 15mDelta
Sun 14/1206:30LHR - EYW
2 stops18h 14mDelta
Deal found 22/8£464
Thu 11/1214:35EYW - LHR
1 stop12h 15mKLM
Sun 14/1208:55LHR - EYW
1 stop15h 49mKLM
Deal found 22/8£469
Thu 11/1219:28EYW - LHR
2 stops35h 12mBritish Airways
Sun 14/1209:45LHR - EYW
1 stop13h 53mBritish Airways
Deal found 20/8£545
Sat 4/1013:59EYW - LHR
1 stop15h 36mBritish Airways
Sat 11/1013:40LHR - EYW
1 stop32h 36mBritish Airways
Deal found 20/8£592
Sat 4/1012:00EYW - LHR
1 stop14h 40mAmerican Airlines
Sat 11/1019:05LHR - EYW
2 stops20h 47mAmerican Airlines
Deal found 20/8£595
Thu 11/1215:02EYW - LHR
2 stops15h 18mUnited Airlines
Sun 14/1216:20LHR - EYW
2 stops26h 46mUnited Airlines
Deal found 20/8£600
Sat 4/1015:11EYW - LHR
2 stops16h 29mMultiple Airlines
Sat 11/1016:40LHR - EYW
2 stops26h 49mMultiple Airlines
Deal found 20/8£615

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 22 August 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

Thu 11/12

19:28-11:40

2 stops35h 12m

London Heathrow

Sun 14/12

09:45-18:38

1 stop13h 53m

£545

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 11/12

11:45-06:25

1 stop13h 40m

London Heathrow

Sun 14/12

06:30-19:44

2 stops18h 14m

£546

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 11/12

14:35-07:50

1 stop12h 15m

London Heathrow

Sun 14/12

08:55-17:12

1 stop13h 17m

£551

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sat 4/10

13:59-10:35

1 stop15h 36m

London Heathrow

Sat 11/10

13:40-17:16

1 stop32h 36m

£592

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sat 4/10

12:00-07:40

1 stop14h 40m

London Heathrow

Sat 11/10

19:05-10:52

2 stops20h 47m

£595

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 11/12

15:02-11:20

2 stops15h 18m

London Heathrow

Sun 14/12

16:20-14:06

2 stops26h 46m

£600

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sat 4/10

15:11-12:40

2 stops16h 29m

London Heathrow

Sat 11/10

16:40-14:29

2 stops26h 49m

£615

Flights are sorted by cheapest return flights first.

Deals found on 20/8

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 15m. 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.

  • What is the cheapest month to book a flight from Key West to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Key West to London Heathrow Airport (average of £112). Flying from Key West to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
Hounslow
Gatwick
Slough
Northampton
Deal
Luton
Wembley
Ilford
Crawley
Hayes
Watford
Folkestone
Ipswich
Winchester
Swindon
Eastbourne
Chichester
Southend-on-Sea

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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?

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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