Cheap flights from London, United Kingdom to Key West, FL

Flights starting at £369. Choose between Porter Airlines, Allegiant Air, or JetBlue Airways to find the best price.

One search, all the flights

We find you the best flight deals and travel hacks so that you can choose how to book.

Rise above all travel anxieties

With the Kiwi.com Guarantee we have your back with whatever happens.

Trusted by millions

Join over 10 million yearly travellers booking with ease.

How much do flights to Key West cost?

Key info about flying to Key West

Depart from
Heathrow
Arrive to
Key West International
Average flights per week
134
Flight distance

Check-in for a flight from London to Key West

NameCarrier codeIATA CodePassport needed during booking
Porter AirlinesPOEPDNo
Allegiant AirAAYG4No
JetBlue AirwaysJBUB6No
RyanairRYRFRNo
Silver AirwaysSIL3MNo

Weather in Key West

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January22°C20°C
February23°C21°C
March23°C22°C
April25°C24°C
May26°C25°C
June28°C27°C
July29°C28°C
August29°C28°C
September29°C28°C
October27°C26°C
November25°C24°C
December24°C22°C
Hottest Month
29°C
August
Coldest month
20°C
January
Sunny days
294
days per year

14 day forecast

Monday
20 Jan
78%
20°C18°C
27 Jan
79%
23°C22°C
Tuesday
21 Jan
21°C18°C
28 Jan
23°C23°C
Wednesday
22 Jan
22°C15°C
29 Jan
23°C23°C
Thursday
23 Jan
81%
19°C16°C
30 Jan
24°C23°C
Friday
24 Jan
88%
18°C16°C
31 Jan
23°C19°C
Saturday
25 Jan
18°C14°C
1 Feb
21°C19°C
Sunday
26 Jan
22°C21°C
2 Feb
77%
21°C20°C

Travel tips & how to get from London to Key West

The cheapest price of a one-way ticket from London to Key West is £341. Round trip fares cost between £596 at the lowest and £1,248 at most.
Travelers usually depart from Heathrow, Gatwick, London Stansted, Luton, or London City when they travel from London to Key West. The most popular airlines for this route are Porter Airlines, Allegiant Air, JetBlue Airways, Ryanair, and Silver Airways. London and Key West have 134 direct flights per week.

Frequently asked questions

What are the most popular routes to and from London?
What are the most popular routes to and from Key West?
What airports are near Key West?
Which airlines fly between London and Key West?
When's the best time to travel between London and Key West?
What flights operate between London and Key West?
How many airports are there near Key West?
What time do nonstop (direct) flights between London and Key West depart?
What time do nonstop (direct) flights between London and Key West arrive?
What time do flights between London and Key West depart?
What time do flights between London and Key West arrive?

The nearest countries with flights to Key West

Here is a list of countries people are flying from

Other destination countries from London

Here is a list of countries people are flying to
Find the best connection from London to Key West
Search flights

Get more out of Kiwi.com with our mobile application

Download boarding passes

One-click booking

Get exclusive offers and prices

Mobile trip notifications


We hack the system,
you fly for less