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Cheap flights from Key West to London from £243

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 9/1. 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
0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
13:33 - 11:30EYW-LHR
16h 57m1 stop
British Airways Logo
11:25 - 23:56LHR-EYW
17h 31m2 stops
£479British Airways
Find Deal
Sun, 1 Feb - Tue, 10 Feb
British Airways Logo
19:45 - 12:20EYW-LHR
11h 35m1 stop
British Airways Logo
09:45 - 19:10LHR-EYW
14h 25m1 stop
£494British Airways
Find Deal
Sun, 1 Feb - Tue, 10 Feb
Multiple Airlines Logo
13:33 - 10:35EYW-LHR
16h 02m2 stops
Multiple Airlines Logo
10:45 - 23:56LHR-EYW
18h 11m2 stops
£496Multiple Airlines
Find Deal
Sun, 1 Feb - Tue, 10 Feb
American Airlines Logo
16:10 - 11:30EYW-LHR
14h 20m1 stop
American Airlines Logo
11:45 - 21:45LHR-EYW
15h 00m1 stop
£506American Airlines
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Sun, 7 Dec - Sun, 14 Dec
Delta Logo
07:00 - 07:50EYW-LHR
19h 50m1 stop
Delta Logo
11:45 - 11:03LHR-EYW
27h 18m2 stops
£529Delta
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Tue, 3 Mar - Sun, 15 Mar
KLM Logo
14:35 - 07:50EYW-LHR
12h 15m1 stop
KLM Logo
08:55 - 19:44LHR-EYW
14h 49m1 stop
£530KLM
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Tue, 3 Mar - Sun, 15 Mar
Delta Logo
07:00 - 10:15EYW-LHR
22h 15m2 stops
Delta Logo
11:45 - 11:03LHR-EYW
27h 18m2 stops
£532Delta
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Tue, 3 Mar - Sun, 15 Mar
Delta Logo
07:10 - 07:40EYW-LHR
19h 30m2 stops
Delta Logo
06:20 - 19:42LHR-EYW
18h 22m2 stops
£554Delta
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Sun, 1 Feb - Tue, 10 Feb
Delta Logo
14:35 - 07:50EYW-LHR
13h 15m1 stop
Delta Logo
10:55 - 19:44LHR-EYW
13h 49m1 stop
£579Delta
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Fri, 27 Mar - Tue, 31 Mar
Multiple Airlines Logo
13:33 - 18:20EYW-LHR
23h 47m2 stops
Multiple Airlines Logo
06:05 - 19:35LHR-EYW
18h 30m2 stops
£722Multiple Airlines
Find Deal
Sun, 7 Dec - Sun, 14 Dec

Delta flights from Key West to London Heathrow Airport

Our best Delta deals on Key West to London Heathrow Airport flight tickets
Delta
3 Mar
EYW07:00Key West
19h 50m
1 stop
LHR07:50London Heathrow
15 Mar
LHR11:45London Heathrow
27h 18m
2 stops
EYW11:03Key West
£529
Find similar
Delta
3 Mar
EYW07:00Key West
22h 15m
2 stops
LHR10:15London Heathrow
15 Mar
LHR11:45London Heathrow
27h 18m
2 stops
EYW11:03Key West
£532
Find similar
Delta
1 Feb
EYW07:10Key West
19h 30m
2 stops
LHR07:40London Heathrow
10 Feb
LHR06:20London Heathrow
18h 22m
2 stops
EYW19:42Key West
£554
Find similar

British Airways flights from Key West to London Heathrow Airport

Our best British Airways deals on Key West to London Heathrow Airport flight tickets
British Airways
1 Feb
EYW13:33Key West
16h 57m
1 stop
LHR11:30London Heathrow
10 Feb
LHR11:25London Heathrow
17h 31m
2 stops
EYW23:56Key West
£479
Find similar
British Airways
1 Feb
EYW19:45Key West
11h 35m
1 stop
LHR12:20London Heathrow
10 Feb
LHR09:45London Heathrow
14h 25m
1 stop
EYW19:10Key West
£494
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Key West to London Heathrow Airport 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 29 October 2025.
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

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 1/2

13:33-11:30

1 stop16h 57m

London Heathrow

Tue 10/2

11:25-23:56

2 stops17h 31m

£479

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 1/2

19:45-12:20

1 stop11h 35m

London Heathrow

Tue 10/2

09:45-19:10

1 stop14h 25m

£494

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 1/2

13:33-10:35

2 stops16h 02m

London Heathrow

Tue 10/2

10:45-23:56

2 stops18h 11m

£496

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 7/12

16:10-11:30

1 stop14h 20m

London Heathrow

Sun 14/12

11:45-21:45

1 stop15h 00m

£506

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 3/3

07:00-07:50

1 stop19h 50m

London Heathrow

Sun 15/3

11:45-11:03

2 stops27h 18m

£529

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 3/3

14:35-07:50

1 stop12h 15m

London Heathrow

Sun 15/3

08:55-19:44

1 stop14h 49m

£530

Key WestLondon

EYW - LHR

EYWLHR

Key West

Tue 3/3

07:00-10:15

2 stops22h 15m

London Heathrow

Sun 15/3

11:45-11:03

2 stops27h 18m

£532

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 1/2

07:10-07:40

2 stops19h 30m

London Heathrow

Tue 10/2

06:20-19:42

2 stops18h 22m

£554

Key WestLondon

EYW - LHR

EYWLHR

Key West

Fri 27/3

14:35-07:50

1 stop13h 15m

London Heathrow

Tue 31/3

10:55-19:44

1 stop13h 49m

£579

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 7/12

13:33-18:20

2 stops23h 47m

London Heathrow

Sun 14/12

06:05-19:35

2 stops18h 30m

£722

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Key West to London Heathrow Airport

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 day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Key West is on a Saturday. momondo users have found tickets for Saturday departures for as low as £598. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Tuesday is £1,182.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Key West to London Heathrow Airport in the afternoon for as low as £718. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are £1,182 on average. Flights to London Heathrow Airport from Key West at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

When to book flights from Key West to London Heathrow Airport

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

Cheap Key West to London Heathrow Airport (EYW to LHR) flight deals and tips

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

Direct flights

None
There are no direct flights from Key West to London Heathrow Airport. There are no popular flight routes from Key West to London Heathrow Airport.
Search flight deals

  • How far is Key West to London Heathrow by plane?

    The distance between Key West and London Heathrow is about 4541.3 mi. A reasonable flight in good conditions will take 11h 35m.

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

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Key West Airport to London Heathrow Airport.

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

    The necessary travel and health documents for your London Heathrow Airport 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
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Northampton
Swindon
Canterbury
Stratford-upon-Avon
Southend-on-Sea
Ipswich
Ilford
Poole
Guildford
Swanage
Colchester
Dover
Hayes
Chelmsford

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Key West to London for you.

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

Yes. All flights to London from Key West on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Key West.

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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