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Cheap flights from Key West to London from £644

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Key West to London departing on 7/11. 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
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Find the cheapest flights from Key West to London

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
20:00 - 06:50
EYW
-
LHR
29h 50m
1 stop
British Airways Logo
06:15 - 19:29
LHR
-
EYW
18h 14m
2 stops
£645British Airways
Sat, 7 Nov - Wed, 11 Nov
British Airways Logo
20:00 - 06:50
EYW
-
LHR
29h 50m
1 stop
British Airways Logo
09:45 - 19:29
LHR
-
EYW
14h 44m
1 stop
£663British Airways
Sat, 7 Nov - Wed, 11 Nov
British Airways Logo
20:00 - 16:05
EYW
-
LHR
15h 05m
2 stops
British Airways Logo
07:35 - 19:29
LHR
-
EYW
16h 54m
2 stops
£669British Airways
Sat, 7 Nov - Wed, 11 Nov
American Airlines Logo
13:50 - 09:05
EYW
-
LHR
14h 15m
1 stop
American Airlines Logo
06:15 - 18:31
LHR
-
EYW
17h 16m
2 stops
£704American Airlines
Tue, 18 Aug - Tue, 1 Sep
British Airways Logo
13:40 - 06:55
EYW
-
LHR
12h 15m
1 stop
British Airways Logo
09:55 - 18:31
LHR
-
EYW
13h 36m
1 stop
£719British Airways
Tue, 18 Aug - Tue, 1 Sep
Multiple Airlines Logo
13:40 - 17:15
EYW
-
LHR
22h 35m
2 stops
Multiple Airlines Logo
06:15 - 18:31
LHR
-
EYW
17h 16m
2 stops
£723Multiple Airlines
Tue, 18 Aug - Tue, 1 Sep
American Airlines Logo
12:57 - 06:55
EYW
-
LHR
12h 58m
1 stop
American Airlines Logo
08:15 - 18:52
LHR
-
EYW
15h 37m
2 stops
£771American Airlines
Thu, 10 Sep - Sun, 20 Sep
British Airways Logo
13:47 - 13:35
EYW
-
LHR
18h 48m
2 stops
British Airways Logo
06:15 - 19:17
LHR
-
EYW
18h 02m
2 stops
£785British Airways
Thu, 10 Sep - Sun, 20 Sep
Delta Logo
14:24 - 07:15
EYW
-
LHR
11h 51m
1 stop
Delta Logo
06:30 - 19:57
LHR
-
EYW
18h 27m
2 stops
£791Delta
Wed, 29 Jul - Tue, 4 Aug
British Airways Logo
11:30 - 09:00
EYW
-
LHR
16h 30m
1 stop
British Airways Logo
09:55 - 19:17
LHR
-
EYW
14h 22m
1 stop
£796British Airways
Thu, 10 Sep - Sun, 20 Sep

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American Airlines flights from Key West to London

Our best American Airlines deals on Key West to London flight tickets
American Airlines
18 Aug
EYW13:50Key West
14h 15m
1 stop
LHR09:05London Heathrow
1 Sept
LHR06:15London Heathrow
17h 16m
2 stops
EYW18:31Key West
£704
American Airlines
10 Sept
EYW12:57Key West
12h 58m
1 stop
LHR06:55London Heathrow
20 Sept
LHR08:15London Heathrow
15h 37m
2 stops
EYW18:52Key West
£771
American Airlines
13 Jul
EYW19:40Key West
11h 55m
1 stop
LHR12:35London Heathrow
22 Jul
LHR09:15London Heathrow
14h 33m
1 stop
EYW18:48Key West
£975

United Airlines flights from Key West to London

Our best United Airlines deals on Key West to London flight tickets
United Airlines
31 Jul
EYW14:26Key West
13h 54m
1 stop
LHR09:20London Heathrow
4 Aug
LHR16:40London Heathrow
25h 50m
2 stops
EYW13:30Key West
£841
United Airlines
24 Jul
EYW14:26Key West
11h 49m
1 stop
LHR07:15London Heathrow
29 Jul
LHR18:00London Heathrow
24h 30m
1 stop
EYW13:30Key West
£843
United Airlines
29 Jul
EYW14:26Key West
11h 49m
1 stop
LHR07:15London Heathrow
3 Aug
LHR16:40London Heathrow
25h 50m
2 stops
EYW13:30Key West
£857

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 28 June 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 - LHR

EYWLHR

Key West

Sat 7/11

20:00-06:50

1 stop29h 50m

London Heathrow

Wed 11/11

06:15-19:29

2 stops18h 14m

£644

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sat 7/11

20:00-06:50

1 stop29h 50m

London Heathrow

Wed 11/11

09:45-19:29

1 stop14h 44m

£663

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sat 7/11

20:00-16:05

2 stops15h 05m

London Heathrow

Wed 11/11

07:35-19:29

2 stops16h 54m

£669

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 18/8

13:50-09:05

1 stop14h 15m

London Heathrow

Tue 1/9

06:15-18:31

2 stops17h 16m

£704
Fastest return journey

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 18/8

13:40-06:55

1 stop12h 15m

London Heathrow

Tue 1/9

09:55-18:31

1 stop13h 36m

£719

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 18/8

13:40-17:15

2 stops22h 35m

London Heathrow

Tue 1/9

06:15-18:31

2 stops17h 16m

£723

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 10/9

12:57-06:55

1 stop12h 58m

London Heathrow

Sun 20/9

08:15-18:52

2 stops15h 37m

£771

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 10/9

13:47-13:35

2 stops18h 48m

London Heathrow

Sun 20/9

06:15-19:17

2 stops18h 02m

£785

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 29/7

14:24-07:15

1 stop11h 51m

London Heathrow

Tue 4/8

06:30-19:57

2 stops18h 27m

£791

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 10/9

11:30-09:00

1 stop16h 30m

London Heathrow

Sun 20/9

09:55-19:17

1 stop14h 22m

£796

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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

16h 53m

Direct flights

None
The fastest flight from Key West to London takes 16h 53m
There are no direct flights from Key West to London. There are no popular flight routes from Key West to London.
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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 16h 53m.

  • 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.

Frequently asked questions about flying from Key West to London

  • How do I get Price Alerts for flights from Key West to London?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Key West from London. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Key West to London with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Travelling to a place near London?

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