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Cheap flights from Key West to London from £237

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Key West to London departing on 16/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Key West to London

Cheap return flights

Enter your travel dates to find the best prices.
KLM Logo
14:00 - 13:15EYW  Key West-LHR London Heathrow
18h 15m1 stop Atlanta Hartsfield-Jackson
KLM Logo
20:55 - 17:23LHR  London Heathrow-EYW Key West
25h 28m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson
£688KLM
Mon, 14 Sep - Mon, 21 Sep
British Airways Logo
13:47 - 11:40EYW  Key West-LHR London Heathrow
16h 53m2 stops Miami Barcelona-El Prat
British Airways Logo
20:00 - 19:17LHR  London Heathrow-EYW Key West
28h 17m2 stops Madrid Barajas Miami
£710British Airways
Mon, 14 Sep - Mon, 21 Sep
KLM Logo
14:00 - 06:25EYW  Key West-LHR London Heathrow
11h 25m1 stop Atlanta Hartsfield-Jackson
KLM Logo
09:20 - 17:23LHR  London Heathrow-EYW Key West
13h 03m1 stop Atlanta Hartsfield-Jackson
£747KLM
Mon, 14 Sep - Mon, 21 Sep
United Airlines Logo
16:10 - 12:00EYW  Key West-LHR London Heathrow
14h 50m1 stop Chicago O'Hare Intl
United Airlines Logo
16:20 - 13:52LHR  London Heathrow-EYW Key West
26h 32m2 stops Washington, D.C. Dulles Intl Newark
£797United Airlines
Sun, 15 Nov - Wed, 18 Nov
United Airlines Logo
16:10 - 12:00EYW  Key West-LHR London Heathrow
14h 50m1 stop Chicago O'Hare Intl
United Airlines Logo
10:25 - 15:29LHR  London Heathrow-EYW Key West
34h 04m1 stop Chicago O'Hare Intl
£797United Airlines
Sun, 15 Nov - Wed, 18 Nov
United Airlines Logo
16:10 - 05:55EYW  Key West-LHR London Heathrow
32h 45m1 stop Chicago O'Hare Intl
United Airlines Logo
18:00 - 15:29LHR  London Heathrow-EYW Key West
26h 29m2 stops Newark Chicago O'Hare Intl
£803United Airlines
Sun, 15 Nov - Wed, 18 Nov
United Airlines Logo
16:10 - 05:55EYW  Key West-LHR London Heathrow
32h 45m1 stop Chicago O'Hare Intl
United Airlines Logo
18:00 - 13:52LHR  London Heathrow-EYW Key West
24h 52m1 stop Newark
£804United Airlines
Sun, 15 Nov - Wed, 18 Nov
British Airways Logo
19:47 - 20:00EYW  Key West-LGW London Gatwick
43h 13m2 stops Miami Madrid Barajas
British Airways Logo
20:40 - 19:33LGW  London Gatwick-EYW Key West
51h 53m2 stops Madrid Barajas Miami
£1,136British Airways
Thu, 1 Oct - Mon, 5 Oct
Multiple Airlines Logo
14:00 - 17:40EYW  Key West-LHR London Heathrow
22h 40m2 stops Atlanta Hartsfield-Jackson Kastrup Copenhagen
Multiple Airlines Logo
10:20 - 10:46LHR  London Heathrow-EYW Key West
29h 26m3 stops Kastrup Copenhagen New York John F Kennedy Intl Atlanta Hartsfield-Jackson
£1,201Multiple Airlines
Mon, 14 Sep - Mon, 21 Sep
British Airways Logo
19:47 - 20:00EYW  Key West-LGW London Gatwick
43h 13m2 stops Miami Madrid Barajas
British Airways Logo
20:40 - 19:33LGW  London Gatwick-EYW Key West
51h 53m2 stops Madrid Barajas Miami
£1,231British Airways
Thu, 1 Oct - Mon, 5 Oct

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KLM flights from Key West to London

Our best KLM deals on Key West to London flight tickets
KLM
14 Sept
EYW14:00Key West
18h 15m
1 stop
LHR13:15London Heathrow
21 Sept
LHR20:55London Heathrow
25h 28m
2 stops
EYW17:23Key West
£688
KLM
14 Sept
EYW14:00Key West
11h 25m
1 stop
LHR06:25London Heathrow
21 Sept
LHR09:20London Heathrow
13h 03m
1 stop
EYW17:23Key West
£747

British Airways flights from Key West to London

Our best British Airways deals on Key West to London flight tickets
British Airways
14 Sept
EYW13:47Key West
16h 53m
2 stops
LHR11:40London Heathrow
21 Sept
LHR20:00London Heathrow
28h 17m
2 stops
EYW19:17Key West
£710
British Airways
1 Oct
EYW19:47Key West
43h 13m
2 stops
LGW20:00London Gatwick
5 Oct
LGW20:40London Gatwick
51h 53m
2 stops
EYW19:33Key West
£1,136
British Airways
1 Oct
EYW19:47Key West
43h 13m
2 stops
LGW20:00London Gatwick
5 Oct
LGW20:40London Gatwick
51h 53m
2 stops
EYW19:33Key West
£1,231

momondo Fare Finder

 
Customise your flight search to find flights from Key West to London 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, momondo users made 279,928 searches. Data last updated 10 August 2026.
Use the filters below to find and compare flights from Key West to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Key WestLondon

EYW Key West - LHR London Heathrow

EYWLHR

Key West

Mon 14/9

14:00-13:15

1 stop18h 15m

London Heathrow

Mon 21/9

20:55-17:23

2 stops25h 28m

£688

Key WestLondon

EYW Key West - LHR London Heathrow

EYWLHR

Key West

Mon 14/9

13:47-11:40

2 stops16h 53m

London Heathrow

Mon 21/9

20:00-19:17

2 stops28h 17m

£710
Fastest return journey

Key WestLondon

EYW Key West - LHR London Heathrow

EYWLHR

Key West

Mon 14/9

14:00-06:25

1 stop11h 25m

London Heathrow

Mon 21/9

09:20-17:23

1 stop13h 03m

£747

Key WestLondon

EYW Key West - LHR London Heathrow

EYWLHR

Key West

Sun 15/11

16:10-12:00

1 stop14h 50m

London Heathrow

Wed 18/11

16:20-13:52

2 stops26h 32m

£796

Key WestLondon

EYW Key West - LHR London Heathrow

EYWLHR

Key West

Sun 15/11

16:10-12:00

1 stop14h 50m

London Heathrow

Wed 18/11

10:25-15:29

1 stop34h 04m

£797

Key WestLondon

EYW Key West - LHR London Heathrow

EYWLHR

Key West

Sun 15/11

16:10-05:55

1 stop32h 45m

London Heathrow

Wed 18/11

18:00-15:29

2 stops26h 29m

£803

Key WestLondon

EYW Key West - LHR London Heathrow

EYWLHR

Key West

Sun 15/11

16:10-05:55

1 stop32h 45m

London Heathrow

Wed 18/11

18:00-13:52

1 stop24h 52m

£804

Key WestLondon

EYW Key West - LGW London Gatwick

EYWLGW

Key West

Thu 1/10

19:47-20:00

2 stops43h 13m

London Gatwick

Mon 5/10

20:40-19:33

2 stops51h 53m

£1,136

Key WestLondon

EYW Key West - LHR London Heathrow

EYWLHR

Key West

Mon 14/9

14:00-17:40

2 stops22h 40m

London Heathrow

Mon 21/9

10:20-10:46

3 stops29h 26m

£1,201

Key WestLondon

EYW Key West - LGW London Gatwick

EYWLGW

Key West

Thu 1/10

19:47-20:00

2 stops43h 13m

London Gatwick

Mon 5/10

20:40-19:33

2 stops51h 53m

£1,231

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Key West to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Key West to London?

British Airways is the most popular carrier operating from Key West to London

When to book flights from Key West to London

Are you open to changing your travel dates? Check out the ideal times to fly from Key West to London according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Key West to London (EYW to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Key West to London

Fastest flight time

18h 15m

Direct flights

None
The fastest flight from Key West to London takes 18h 15m
There are no direct flights from Key West to London. There are no popular flight routes from Key West to London.
Search flight deals

Frequently asked questions about flying from Key West to London

  • How far is Key West to London by plane?

    A flight from Key West to London will travel around 4555.0 mi. By plane, this route typically takes 18h 15m.

  • When did momondo last update prices for flights from Key West Airport to London?

    Prices for flights from Key West Airport to London refresh daily.

  • How old do you have to be to fly from Key West Airport to London?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Key West Airport to London.

  • What documentation or ID do you need to fly to London?

    The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Wembley
Gatwick
Milton Keynes
Luton
Southend-on-Sea
Slough
Ipswich
Maidstone
Folkestone
Ilford
Hastings
Canterbury
Guildford
Chichester
Hayes
Bedford
Harlow
Colchester
Chelmsford

Why use momondo?

Why should I use momondo to find a flight deal from Key West to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Key West to London . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Key West to London with flexible booking policies on momondo?

All flight searches from Key West to London on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Key West to London?

Once you have performed a search for Key West to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Key West to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Key West and alert you when they change.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport