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Cheap flights from Key West to London from £326

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 15/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Key West to London (EYW-LHR)

Cheap return flights

British Airways Logo
19:28 - 11:40EYW-LHR
35h 12m2 stops
British Airways Logo
09:45 - 18:38LHR-EYW
13h 53m1 stop
£493British Airways
Find Deal
Thu, 11 Dec - Sun, 14 Dec
British Airways Logo
17:47 - 09:25EYW-LHR
10h 38m1 stop
British Airways Logo
19:05 - 19:22LHR-EYW
28h 17m2 stops
£495British Airways
Find Deal
Wed, 8 Oct - Wed, 29 Oct
British Airways Logo
19:28 - 11:40EYW-LHR
35h 12m2 stops
British Airways Logo
09:45 - 18:38LHR-EYW
13h 53m1 stop
£501British Airways
Find Deal
Thu, 11 Dec - Sun, 14 Dec
British Airways Logo
13:25 - 10:35EYW-LHR
16h 10m1 stop
British Airways Logo
09:45 - 19:22LHR-EYW
13h 37m1 stop
£511British Airways
Find Deal
Wed, 8 Oct - Wed, 29 Oct
British Airways Logo
13:45 - 06:50EYW-LHR
12h 05m1 stop
British Airways Logo
06:05 - 18:38LHR-EYW
17h 33m2 stops
£529British Airways
Find Deal
Wed, 26 Nov - Sun, 7 Dec
United Airlines Logo
15:12 - 16:25EYW-LHR
20h 13m2 stops
United Airlines Logo
16:20 - 14:04LHR-EYW
25h 44m2 stops
£532United Airlines
Find Deal
Wed, 8 Oct - Wed, 29 Oct
TAP AIR PORTUGAL Logo
12:50 - 11:25EYW-LHR
17h 35m2 stops
TAP AIR PORTUGAL Logo
08:15 - 11:55LHR-EYW
32h 40m2 stops
£535TAP AIR PORTUGAL
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Wed, 26 Nov - Sun, 7 Dec
American Airlines Logo
13:39 - 06:55EYW-LHR
12h 16m1 stop
American Airlines Logo
06:05 - 18:38LHR-EYW
17h 33m2 stops
£570American Airlines
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Thu, 27 Nov - Sun, 7 Dec
United Airlines Logo
13:06 - 07:10EYW-LHR
37h 04m2 stops
United Airlines Logo
11:10 - 14:06LHR-EYW
31h 56m2 stops
£576United Airlines
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Thu, 27 Nov - Sun, 7 Dec
Logo
13:25 - 11:30EYW-LHR
17h 05m2 stops
Logo
18:30 - 11:53LHR-EYW
46h 23m2 stops
£4,273
Find Deal
Wed, 15 Oct - Wed, 12 Nov

United Airlines flights from Key West to London Heathrow Airport

Our best United Airlines deals on Key West to London Heathrow Airport flight tickets
United Airlines
8 Oct
EYW15:12Key West
20h 13m
2 stops
LHR16:25London Heathrow
29 Oct
LHR16:20London Heathrow
25h 44m
2 stops
EYW14:04Key West
£532
Find similar
United Airlines
27 Nov
EYW13:06Key West
37h 04m
2 stops
LHR07:10London Heathrow
7 Dec
LHR11:10London Heathrow
31h 56m
2 stops
EYW14:06Key West
£576
Find similar
United Airlines
8 Oct
EYW15:12Key West
16h 38m
2 stops
LHR12:50London Heathrow
29 Oct
LHR13:25London Heathrow
28h 39m
3 stops
EYW14:04Key West
£596
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
11 Dec
EYW19:28Key West
35h 12m
2 stops
LHR11:40London Heathrow
14 Dec
LHR09:45London Heathrow
13h 53m
1 stop
EYW18:38Key West
£493
Find similar
British Airways
8 Oct
EYW17:47Key West
10h 38m
1 stop
LHR09:25London Heathrow
29 Oct
LHR19:05London Heathrow
28h 17m
2 stops
EYW19:22Key West
£495
Find similar
British Airways
11 Dec
EYW19:28Key West
35h 12m
2 stops
LHR11:40London Heathrow
14 Dec
LHR09:45London Heathrow
13h 53m
1 stop
EYW18:38Key West
£501
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 19 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

Fly to

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

£493

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 8/10

17:47-09:25

1 stop10h 38m

London Heathrow

Wed 29/10

19:05-19:22

2 stops28h 17m

£495

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

£501

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 8/10

13:25-10:35

1 stop16h 10m

London Heathrow

Wed 29/10

09:45-19:22

1 stop13h 37m

£511

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 26/11

13:45-06:50

1 stop12h 05m

London Heathrow

Sun 7/12

06:05-18:38

2 stops17h 33m

£529

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 8/10

15:12-16:25

2 stops20h 13m

London Heathrow

Wed 29/10

16:20-14:04

2 stops25h 44m

£532

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 26/11

12:50-11:25

2 stops17h 35m

London Heathrow

Sun 7/12

08:15-11:55

2 stops32h 40m

£535

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 27/11

13:39-06:55

1 stop12h 16m

London Heathrow

Sun 7/12

06:05-18:38

2 stops17h 33m

£570

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 27/11

13:06-07:10

2 stops37h 04m

London Heathrow

Sun 7/12

11:10-14:06

2 stops31h 56m

£576

Key WestLondon

EYW - LHR

EYWLHR

Key West

Wed 15/10

13:25-11:30

2 stops17h 05m

London Heathrow

Wed 12/11

18:30-11:53

2 stops46h 23m

£4,273

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 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 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 typical price of a round-trip flight between Key West and London Heathrow Airport?

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 £588. 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 £1,163.

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 £706. 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 £1,163 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

Best price found

£326

Fastest flight time

10h 38m

Direct flights

None
The best one-way flight to London Heathrow Airport from Key West in the past 72 hours is £326. The best return flight deal from Key West to London Heathrow Airport found on momondo in the last 72 hours is £493.
The fastest flight from Key West to London Heathrow Airport takes 10h 38m
There are no direct flights from Key West to London Heathrow Airport. Popular non-direct route for this connection is Key West Airport - London Heathrow Airport.
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  • 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 10h 38m.

  • 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.

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Ipswich
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Swanage
Colchester
Worthing
Dartford
Hounslow
Poole

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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