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Flights to Key West

£396 Cheap flights to Key West

1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from the United Kingdom to Key West

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
06:50 - 15:06LHR  London Heathrow-EYW Key West
37h 16m2 stops Brussels Bruxelles-National Chicago O'Hare Intl
United Airlines Logo
16:05 - 06:45EYW  Key West-LHR London Heathrow
33h 40m1 stop Chicago O'Hare Intl
£592United Airlines
Tue, 11 May - Tue, 18 May
United Airlines Logo
06:50 - 15:06LHR  London Heathrow-EYW Key West
37h 16m2 stops Brussels Bruxelles-National Chicago O'Hare Intl
United Airlines Logo
16:05 - 07:15EYW  Key West-LHR London Heathrow
34h 10m2 stops Chicago O'Hare Intl Newark
£609United Airlines
Tue, 11 May - Tue, 18 May
United Airlines Logo
08:00 - 22:30LHR  London Heathrow-EYW Key West
19h 30m2 stops Newark Chicago O'Hare Intl
United Airlines Logo
16:45 - 21:20EYW  Key West-LHR London Heathrow
23h 35m2 stops Houston George Bush Intcntl Newark
£614United Airlines
Fri, 5 Mar - Tue, 9 Mar
United Airlines Logo
10:25 - 11:11LHR  London Heathrow-EYW Key West
29h 46m1 stop Chicago O'Hare Intl
United Airlines Logo
15:28 - 08:25EYW  Key West-LHR London Heathrow
11h 57m1 stop Newark
£614United Airlines
Fri, 5 Mar - Tue, 9 Mar
United Airlines Logo
07:40 - 11:11LHR  London Heathrow-EYW Key West
32h 31m1 stop Chicago O'Hare Intl
United Airlines Logo
16:45 - 06:20EYW  Key West-LHR London Heathrow
32h 35m2 stops Houston George Bush Intcntl Newark
£614United Airlines
Fri, 5 Mar - Tue, 9 Mar
United Airlines Logo
16:20 - 15:55LHR  London Heathrow-EYW Key West
28h 35m2 stops Washington, D.C. Dulles Intl Houston George Bush Intcntl
United Airlines Logo
16:45 - 05:55EYW  Key West-LHR London Heathrow
33h 10m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
£616United Airlines
Fri, 12 Mar - Sun, 21 Mar
United Airlines Logo
16:20 - 16:22LHR  London Heathrow-EYW Key West
29h 02m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
16:45 - 07:40EYW  Key West-LHR London Heathrow
34h 55m1 stop Houston George Bush Intcntl
£616United Airlines
Fri, 12 Mar - Sun, 21 Mar
United Airlines Logo
07:40 - 15:55LHR  London Heathrow-EYW Key West
37h 15m2 stops Chicago O'Hare Intl Houston George Bush Intcntl
United Airlines Logo
16:45 - 10:15EYW  Key West-LHR London Heathrow
13h 30m1 stop Houston George Bush Intcntl
£616United Airlines
Fri, 12 Mar - Sun, 21 Mar
United Airlines Logo
07:45 - 17:02LHR  London Heathrow-EYW Key West
14h 17m1 stop Newark
United Airlines Logo
16:05 - 06:45EYW  Key West-LHR London Heathrow
33h 40m1 stop Chicago O'Hare Intl
£619United Airlines
Tue, 11 May - Tue, 18 May
Virgin Atlantic Logo
08:55 - 20:01LHR  London Heathrow-EYW Key West
16h 06m1 stop Atlanta Hartsfield-Jackson
Virgin Atlantic Logo
18:06 - 09:00EYW  Key West-LHR London Heathrow
33h 54m1 stop Atlanta Hartsfield-Jackson
£682Virgin Atlantic
Thu, 3 Dec - Sun, 6 Dec

momondo Fare Finder

 
Use the filters below to find and compare flights to Key West that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonKey West

LHR London Heathrow - EYW Key West

LHREYW

London Heathrow

Tue 11/5

06:50-15:06

2 stops37h 16m

Key West

Tue 18/5

16:05-06:45

1 stop33h 40m

£592

LondonKey West

LHR London Heathrow - EYW Key West

LHREYW

London Heathrow

Tue 11/5

06:50-15:06

2 stops37h 16m

Key West

Tue 18/5

16:05-07:15

2 stops34h 10m

£609

LondonKey West

LHR London Heathrow - EYW Key West

LHREYW

London Heathrow

Fri 5/3

08:00-22:30

2 stops19h 30m

Key West

Tue 9/3

16:45-21:20

2 stops23h 35m

£614
Fastest return journey

LondonKey West

LHR London Heathrow - EYW Key West

LHREYW

London Heathrow

Fri 5/3

10:25-11:11

1 stop29h 46m

Key West

Tue 9/3

15:28-08:25

1 stop11h 57m

£614

LondonKey West

LHR London Heathrow - EYW Key West

LHREYW

London Heathrow

Fri 5/3

07:40-11:11

1 stop32h 31m

Key West

Tue 9/3

16:45-06:20

2 stops32h 35m

£614

LondonKey West

LHR London Heathrow - EYW Key West

LHREYW

London Heathrow

Fri 12/3

16:20-15:55

2 stops28h 35m

Key West

Sun 21/3

16:45-05:55

2 stops33h 10m

£616

LondonKey West

LHR London Heathrow - EYW Key West

LHREYW

London Heathrow

Fri 12/3

16:20-16:22

1 stop29h 02m

Key West

Sun 21/3

16:45-07:40

1 stop34h 55m

£616

LondonKey West

LHR London Heathrow - EYW Key West

LHREYW

London Heathrow

Fri 12/3

07:40-15:55

2 stops37h 15m

Key West

Sun 21/3

16:45-10:15

1 stop13h 30m

£616

LondonKey West

LHR London Heathrow - EYW Key West

LHREYW

London Heathrow

Tue 11/5

07:45-17:02

1 stop14h 17m

Key West

Tue 18/5

16:05-06:45

1 stop33h 40m

£619

LondonKey West

LHR London Heathrow - EYW Key West

LHREYW

London Heathrow

Thu 3/12

08:55-20:01

1 stop16h 06m

Key West

Sun 6/12

18:06-09:00

1 stop33h 54m

£682

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to Key West from

Key West flights insights and trends

Explore insights for your Key West flight to craft the best travel plan

What is the cheapest month to fly to Key West?

If you aren’t able to travel to Key West during the month of October, then flying in September is also cheap. Prices for this month can be found on momondo for an average of £573.

Cheapest flights to Key West

Find the cheapest flights to Key West from your nearest city or airport
Find flights from London Heathrow Airport to Key West
CHEAPEST MONTH TO FLY TO KEY WEST FROM LONDON HEATHROW AIRPORTAugust30% cheaperFlying from London Heathrow Airport to Key West costs on average just £422 in August
MOST EXPENSIVE MONTH TO FLY TO KEY WEST FROM LONDON HEATHROW AIRPORTDecember33% more expensiveIt costs about £803 for flights to Key West from London Heathrow Airport in December
MOST POPULAR MONTH TO FLY TO KEY WEST FROM LONDON HEATHROW AIRPORTOctober700% more users visitedMore momondo users searched in flights to Key West from London Heathrow Airport in October than any other month

Cheap Key West flight deals and tips

Summary info about Key West flight prices, duration and airlines

Best One-Way Price

£396

Best Round-Trip Price

£592

Fastest flight time

28h 44m
The best one-way flight price to Key West from United Kingdom in the last 5 days is £396 (London Gatwick to Key West).
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The best return flight price to Key West from United Kingdom in the last 5 days is £592 (London Heathrow to Key West).
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The fastest flight to Key West from United Kingdom takes 28h 44m (London Gatwick to Key West).
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Frequently asked questions about flying to Key West

What is there to do in Key West when it’s raining?

Users planning a flight to Key West during the months of August or September should anticipate rain. There are still things to do in Key West even when it's raining, though. Many tourists kill time during rain and storms by going to shopping centres in the area, like Duval Street.

When did momondo last update prices for flights to Key West Airport?

Prices for flights to Key West Airport are refreshed on a daily basis.

How many operators does momondo search for flights to Key West Airport?

As of November 2026, there are 3 operators available to choose from for flights to Key West Airport.

How old do you have to be to fly to Key West Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel to Key West Airport.

What documentation or ID do you need to fly to Key West Airport?

The travel and health documents you'll need for your trip to Key West Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Key West Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Key West?

Book flights to Key West if you plan to visit one of these locations
Big Pine Key

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Key West.

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

momondo does allow users to show only those flights to Key West which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights to Key West?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight to Key West.

I’m not ready to book a flight to Key West right now. Can momondo alert me if prices change?

Yes. momondo can track flight prices for Key West and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to Key West

Popular Flights to Key West

London to Key West Flightsfrom £782
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