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Cheap flights from Key West to London from $628

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Key West to London departing on 2/20. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:40 pm - 10:50 am
EYW
-
LHR
11h 10m1 stop
United Airlines Logo
6:50 am - 10:09 pm
LHR
-
EYW
20h 19m2 stops
$628United Airlines
Fri, Feb 20 - Sun, Mar 1
KLM Logo
6:06 pm - 11:40 am
EYW
-
LHR
12h 34m1 stop
KLM Logo
6:30 am - 7:40 pm
LHR
-
EYW
18h 10m2 stops
$630KLM
Sun, Jan 25 - Sun, Feb 1
British Airways Logo
7:45 pm - 8:35 am
EYW
-
LHR
31h 50m1 stop
British Airways Logo
6:00 am - 11:56 pm
LHR
-
EYW
22h 56m2 stops
$632British Airways
Sun, Feb 1 - Tue, Feb 10
Delta Logo
6:25 pm - 11:40 am
EYW
-
LHR
13h 15m1 stop
Delta Logo
6:20 am - 7:41 pm
LHR
-
EYW
17h 21m2 stops
$636Delta
Mon, Mar 9 - Wed, Mar 18
Delta Logo
11:59 am - 10:45 am
EYW
-
LHR
17h 46m2 stops
Delta Logo
6:30 am - 7:42 pm
LHR
-
EYW
18h 12m2 stops
$639Delta
Thu, Feb 19 - Sun, Mar 1
Multiple Airlines Logo
1:36 pm - 6:50 am
EYW
-
LHR
12h 14m1 stop
Multiple Airlines Logo
6:05 am - 6:52 pm
LHR
-
EYW
17h 47m2 stops
$647Multiple Airlines
Thu, Feb 19 - Sat, Feb 28
British Airways Logo
7:45 pm - 12:50 pm
EYW
-
LHR
36h 05m2 stops
British Airways Logo
5:05 pm - 7:10 pm
LHR
-
EYW
31h 05m2 stops
$648British Airways
Sun, Jan 25 - Sun, Feb 1
Delta Logo
2:46 pm - 7:50 am
EYW
-
LHR
12h 04m1 stop
Delta Logo
8:55 am - 7:42 pm
LHR
-
EYW
15h 47m1 stop
$657Delta
Fri, Feb 20 - Sat, Feb 28
British Airways Logo
7:45 pm - 8:35 am
EYW
-
LHR
31h 50m1 stop
British Airways Logo
9:45 am - 7:10 pm
LHR
-
EYW
14h 25m1 stop
$660British Airways
Sun, Feb 1 - Tue, Feb 10
Delta Logo
7:10 am - 6:20 am
EYW
-
LHR
18h 10m2 stops
Delta Logo
3:50 pm - 10:57 am
LHR
-
EYW
23h 07m1 stop
$661Delta
Fri, Mar 6 - Sat, Mar 14

KLM flights from Key West to London Heathrow Airport

Our best KLM deals on Key West to London Heathrow Airport flight tickets
KLM
Jan 25
EYW6:06 pmKey West
12h 34m
1 stop
LHR11:40 amLondon Heathrow
Feb 1
LHR6:30 amLondon Heathrow
18h 10m
2 stops
EYW7:40 pmKey West
$630
Find similar
KLM
Jan 25
EYW6:06 pmKey West
12h 34m
1 stop
LHR11:40 amLondon Heathrow
Feb 1
LHR8:55 amLondon Heathrow
15h 45m
1 stop
EYW7:40 pmKey West
$657
Find similar
KLM
Feb 21
EYW11:59 amKey West
16h 01m
1 stop
LHR9:00 amLondon Heathrow
Mar 1
LHR6:30 amLondon Heathrow
18h 12m
2 stops
EYW7:42 pmKey West
$1,020
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
Feb 1
EYW7:45 pmKey West
31h 50m
1 stop
LHR8:35 amLondon Heathrow
Feb 10
LHR6:00 amLondon Heathrow
22h 56m
2 stops
EYW11:56 pmKey West
$632
Find similar
British Airways
Jan 25
EYW4:37 pmKey West
37h 58m
2 stops
LHR11:35 amLondon Heathrow
Feb 1
LHR5:05 pmLondon Heathrow
35h 51m
2 stops
EYW11:56 pmKey West
$648
Find similar
British Airways
Feb 1
EYW7:45 pmKey West
31h 50m
1 stop
LHR8:35 amLondon Heathrow
Feb 10
LHR9:45 amLondon Heathrow
14h 25m
1 stop
EYW7:10 pmKey West
$660
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated December 15, 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

Fri 2/20

6:40 pm-10:50 am

1 stop11h 10m

London Heathrow

Sun 3/1

6:50 am-10:09 pm

2 stops20h 19m

$628

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 1/25

6:06 pm-11:40 am

1 stop12h 34m

London Heathrow

Sun 2/1

6:30 am-7:40 pm

2 stops18h 10m

$630

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 2/1

7:45 pm-8:35 am

1 stop31h 50m

London Heathrow

Tue 2/10

6:00 am-11:56 pm

2 stops22h 56m

$632

Key WestLondon

EYW - LHR

EYWLHR

Key West

Mon 3/9

6:25 pm-11:40 am

1 stop13h 15m

London Heathrow

Wed 3/18

6:20 am-7:41 pm

2 stops17h 21m

$636

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 2/19

11:59 am-10:45 am

2 stops17h 46m

London Heathrow

Sun 3/1

6:30 am-7:42 pm

2 stops18h 12m

$639

Key WestLondon

EYW - LHR

EYWLHR

Key West

Thu 2/19

1:36 pm-6:50 am

1 stop12h 14m

London Heathrow

Sat 2/28

6:05 am-6:52 pm

2 stops17h 47m

$647

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 1/25

7:45 pm-12:50 pm

2 stops36h 05m

London Heathrow

Sun 2/1

5:05 pm-7:10 pm

2 stops31h 05m

$648

Key WestLondon

EYW - LHR

EYWLHR

Key West

Fri 2/20

2:46 pm-7:50 am

1 stop12h 04m

London Heathrow

Sat 2/28

8:55 am-7:42 pm

1 stop15h 47m

$657

Key WestLondon

EYW - LHR

EYWLHR

Key West

Sun 2/1

7:45 pm-8:35 am

1 stop31h 50m

London Heathrow

Tue 2/10

9:45 am-7:10 pm

1 stop14h 25m

$660

Key WestLondon

EYW - LHR

EYWLHR

Key West

Fri 3/6

7:10 am-6:20 am

2 stops18h 10m

London Heathrow

Sat 3/14

3:50 pm-10:57 am

1 stop23h 07m

$661

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Monday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $691. The most expensive day to fly to London Heathrow Airport is Tuesday, with ticket prices averaging around $2,031.

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 $789. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $2,031.

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 round-trip 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

Fastest flight time

12h 34m

Direct flights

None
The fastest flight from Key West to London Heathrow Airport takes 12h 34m
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?

    A flight from Key West to London Heathrow will travel around 4541.3 mi. Typically, this will take 12h 34m by plane in normal conditions.

  • 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 are refreshed on a daily basis.

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

    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 Heathrow Airport.

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

    The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Stratford-upon-Avon
Crawley
Brentwood
Salisbury
Wembley
Watford
Ilford
Cobham
Folkestone
Romford
Richmond

Why use momondo?

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

Finding the right flight to London from Key West is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to London from Key West with this policy.

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 not ready to book a flight from Key West to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

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