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Cheap flights from Key West to London from $634

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 2/26. 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

Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
2:46 pm - 7:50 am
EYW
-
LHR
12h 04m
1 stop
KLM Logo
6:30 am - 5:01 pm
LHR
-
EYW
15h 31m
2 stops
$634KLM
jeu., févr. 26 - lun., mars 2
Delta Logo
7:10 am - 6:50 am
EYW
-
LHR
18h 40m
2 stops
Delta Logo
6:30 am - 5:01 pm
LHR
-
EYW
15h 31m
2 stops
$638Delta
jeu., févr. 26 - lun., mars 2
KLM Logo
11:59 am - 7:50 am
EYW
-
LHR
14h 51m
1 stop
KLM Logo
10:45 am - 7:42 pm
LHR
-
EYW
13h 57m
1 stop
$661KLM
jeu., févr. 26 - lun., mars 2
United Airlines Logo
7:00 am - 6:45 am
EYW
-
LHR
18h 45m
1 stop
United Airlines Logo
8:00 am - 10:11 pm
LHR
-
EYW
19h 11m
1 stop
$1,045United Airlines
ven., juil. 10 - sam., juil. 25
United Airlines Logo
7:00 am - 6:45 am
EYW
-
LHR
18h 45m
1 stop
United Airlines Logo
4:40 pm - 3:06 pm
LHR
-
EYW
27h 26m
2 stops
$1,049United Airlines
ven., juil. 10 - sam., juil. 25
United Airlines Logo
7:00 am - 6:45 am
EYW
-
LHR
18h 45m
1 stop
United Airlines Logo
10:00 am - 3:06 pm
LHR
-
EYW
34h 06m
2 stops
$1,050United Airlines
ven., juil. 10 - sam., juil. 25
United Airlines Logo
4:05 pm - 6:35 am
EYW
-
LHR
33h 30m
3 stops
United Airlines Logo
8:00 am - 10:11 pm
LHR
-
EYW
19h 11m
1 stop
$1,053United Airlines
ven., juil. 10 - sam., juil. 25
United Airlines Logo
4:05 pm - 6:35 am
EYW
-
LHR
33h 30m
3 stops
United Airlines Logo
1:40 pm - 3:06 pm
LHR
-
EYW
30h 26m
2 stops
$1,058United Airlines
ven., juil. 10 - sam., juil. 25
Multiple Airlines Logo
2:46 pm - 4:00 pm
EYW
-
LHR
20h 14m
2 stops
Multiple Airlines Logo
6:40 am - 10:59 am
LHR
-
EYW
33h 19m
3 stops
$1,487Multiple Airlines
jeu., févr. 26 - lun., mars 2
Multiple Airlines Logo
7:00 am - 9:20 am
EYW
-
LHR
21h 20m
3 stops
Multiple Airlines Logo
6:40 am - 10:58 am
LHR
-
EYW
33h 18m
3 stops
$3,377Multiple Airlines
ven., juil. 10 - sam., juil. 25

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
Jul 10
EYW7:00 amKey West
18h 45m
1 stop
LHR6:45 amLondon Heathrow
Jul 25
LHR8:00 amLondon Heathrow
19h 11m
1 stop
EYW10:11 pmKey West
$1,045
United Airlines
Jul 10
EYW7:00 amKey West
18h 45m
1 stop
LHR6:45 amLondon Heathrow
Jul 25
LHR4:40 pmLondon Heathrow
27h 26m
2 stops
EYW3:06 pmKey West
$1,049
United Airlines
Jul 10
EYW7:00 amKey West
18h 45m
1 stop
LHR6:45 amLondon Heathrow
Jul 25
LHR10:00 amLondon Heathrow
34h 06m
2 stops
EYW3:06 pmKey West
$1,050

American Airlines flights from Key West to London Heathrow Airport

Our best American Airlines deals on Key West to London Heathrow Airport flight tickets
American Airlines
Feb 1
EYW4:01 pmKey West
13h 24m
1 stop
LHR10:25 amLondon Heathrow
Feb 10
LHR11:15 amLondon Heathrow
12h 55m
1 stop
EYW7:10 pmKey West
$725
American Airlines
Feb 1
EYW6:43 pmKey West
12h 17m
1 stop
LHR12:00 pmLondon Heathrow
Feb 10
LHR9:55 amLondon Heathrow
16h 52m
1 stop
EYW9:47 pmKey West
$726

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 janvier 29, 2026.
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

jeu. 2/26

2:46 pm-7:50 am

1 stop12h 04m

London Heathrow

lun. 3/2

6:30 am-5:01 pm

2 stops15h 31m

$634

Key WestLondon

EYW - LHR

EYWLHR

Key West

jeu. 2/26

7:10 am-6:50 am

2 stops18h 40m

London Heathrow

lun. 3/2

6:30 am-5:01 pm

2 stops15h 31m

$638

Key WestLondon

EYW - LHR

EYWLHR

Key West

jeu. 2/26

11:59 am-7:50 am

1 stop14h 51m

London Heathrow

lun. 3/2

10:45 am-7:42 pm

1 stop13h 57m

$661

Key WestLondon

EYW - LHR

EYWLHR

Key West

ven. 7/10

7:00 am-6:45 am

1 stop18h 45m

London Heathrow

sam. 7/25

8:00 am-10:11 pm

1 stop19h 11m

$1,045

Key WestLondon

EYW - LHR

EYWLHR

Key West

ven. 7/10

7:00 am-6:45 am

1 stop18h 45m

London Heathrow

sam. 7/25

4:40 pm-3:06 pm

2 stops27h 26m

$1,049

Key WestLondon

EYW - LHR

EYWLHR

Key West

ven. 7/10

7:00 am-6:45 am

1 stop18h 45m

London Heathrow

sam. 7/25

10:00 am-3:06 pm

2 stops34h 06m

$1,050

Key WestLondon

EYW - LHR

EYWLHR

Key West

ven. 7/10

4:05 pm-6:35 am

3 stops33h 30m

London Heathrow

sam. 7/25

8:00 am-10:11 pm

1 stop19h 11m

$1,053

Key WestLondon

EYW - LHR

EYWLHR

Key West

ven. 7/10

4:05 pm-6:35 am

3 stops33h 30m

London Heathrow

sam. 7/25

1:40 pm-3:06 pm

2 stops30h 26m

$1,058

Key WestLondon

EYW - LHR

EYWLHR

Key West

jeu. 2/26

2:46 pm-4:00 pm

2 stops20h 14m

London Heathrow

lun. 3/2

6:40 am-10:59 am

3 stops33h 19m

$1,487

Key WestLondon

EYW - LHR

EYWLHR

Key West

ven. 7/10

7:00 am-9:20 am

3 stops21h 20m

London Heathrow

sam. 7/25

6:40 am-10:58 am

3 stops33h 18m

$3,377

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

14h 00m

Direct flights

None
The fastest flight from Key West to London Heathrow Airport takes 14h 00m
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 14h 00m 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.

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

    Search flight deals from Key West to London Heathrow Airport. While viewing offers you’ll have the option to create a Price Alert.

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

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Traveling to a place near London?

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

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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1 adult
sam. 2/28
sam. 3/7
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