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$666+ Cheap flights from Key West (EYW) to Heathrow (LHR)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — LHR
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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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 August 14, 2025.

Round-trip from

$666
(Ovago)

Popular in

October

Cheapest in

November

Average price

$1,017
From Key West to London Heathrow
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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 ($63 potential savings vs. average RT 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 August 14, 2025.

This Ovago deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:28 pmEYW - LHR
2 stops35h 12mBritish Airways
Sun 12/149:45 amLHR - EYW
1 stop13h 53mBritish Airways
Deal found 8/14$666
This United Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/93:50 pmEYW - LHR
2 stops35h 45mUnited Airlines
Tue 9/239:30 amLHR - EYW
2 stops34h 25mUnited Airlines
Deal found 8/13$672
This Ovago deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/91:59 pmEYW - LHR
1 stop14h 26mBritish Airways
Wed 9/249:55 amLHR - EYW
1 stop14h 04mBritish Airways
Deal found 8/13$687
This Ovago deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/281:59 pmEYW - LHR
1 stop14h 26mBritish Airways
Sun 10/57:20 pmLHR - EYW
2 stops50h 56mBritish Airways
Deal found 8/14$730
This Ovago deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/91:59 pmEYW - LHR
1 stop14h 26mBritish Airways
Mon 9/229:55 amLHR - EYW
1 stop14h 04mBritish Airways
Deal found 8/13$737
This Ovago deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/81:59 pmEYW - LHR
1 stop14h 26mBritish Airways
Tue 9/239:55 amLHR - EYW
1 stop14h 04mBritish Airways
Deal found 8/13$752
This Ovago deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/81:59 pmEYW - LHR
1 stop15h 36mBritish Airways
Mon 9/229:55 amLHR - EYW
1 stop14h 04mBritish Airways
Deal found 8/13$802
This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/282:00 pmEYW - LHR
2 stops17h 35mDelta
Sun 10/58:25 pmLHR - EYW
2 stops20h 02mDelta
Deal found 8/14$1,024

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated August 14, 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 12/11

7:28 pm-11:40 am

2 stops35h 12m

London Heathrow

Sun 12/14

9:45 am-6:38 pm

1 stop13h 53m

$666

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 9/9

3:50 pm-8:35 am

2 stops35h 45m

London Heathrow

Tue 9/23

9:30 am-2:55 pm

2 stops34h 25m

$672

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 9/9

1:59 pm-9:25 am

1 stop14h 26m

London Heathrow

Wed 9/24

9:55 am-6:59 pm

1 stop14h 04m

$687

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 9/10

1:59 pm-9:25 am

1 stop14h 26m

London Heathrow

Wed 9/24

9:55 am-6:59 pm

1 stop14h 04m

$687

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 9/10

1:59 pm-10:35 am

1 stop15h 36m

London Heathrow

Tue 9/23

9:55 am-6:59 pm

1 stop14h 04m

$687

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 9/9

1:59 pm-9:25 am

1 stop14h 26m

London Heathrow

Tue 9/23

9:55 am-6:59 pm

1 stop14h 04m

$687

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 9/28

1:59 pm-9:25 am

1 stop14h 26m

London Heathrow

Sun 10/5

7:20 pm-5:16 pm

2 stops50h 56m

$730

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 9/9

1:59 pm-9:25 am

1 stop14h 26m

London Heathrow

Mon 9/22

9:55 am-6:59 pm

1 stop14h 04m

$737

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 9/10

1:59 pm-10:35 am

1 stop15h 36m

London Heathrow

Mon 9/22

9:55 am-6:59 pm

1 stop14h 04m

$737

Key WestLondon

EYW - LHR

EYWLHR

Key West

Fri 9/19

7:00 am-11:55 am

3 stops47h 55m

$2,625

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 12 results
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 round-trip 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.

Cheapflights Insights

Everything you need to know about your flight from Key West to London Heathrow Airport

How much does it cost to fly round-trip from Key West to London Heathrow Airport?

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?

    If you book a flight to London Heathrow from Key West, you will be flying from Key West, which is the city’s only airport. Key West (EYW) is located 2.6 mi from the center of Key West. There are 0 flights from Key West to London Heathrow per day from 0 different airlines.

  • 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 vacation 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, November is the cheapest month in which you can book a flight from Key West to London Heathrow Airport (average of $661). Flying from Key West to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Harrow
Canterbury
Dartford
Dover
Stratford-upon-Avon
Orpington
Watford
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Chelmsford
Southend-on-Sea
Folkestone
Chichester
Swindon

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