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Cheap flights from London to Key Largo from £330

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
19 May — 26 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Key Largo are usually found in September or November, booked 52 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from London to Key Largo

Enter your travel dates to find the best prices.

Cheapest flights from London to Key Largo
Explore the most affordable flight options available from London to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 April 2026.

Thu 19/1116:30
LHR
-
MIA
1 stop27h 20m
TAP AIR PORTUGAL
Sat 28/1116:50
MIA
-
LHR
1 stop13h 35m
TAP AIR PORTUGAL
Deal found 19/4£500
Tue 24/1116:35
LGW
-
MIA
1 stop27h 15m
TAP AIR PORTUGAL
Tue 8/1216:50
MIA
-
LGW
1 stop17h 55m
TAP AIR PORTUGAL
Deal found 18/4£500
Wed 27/509:55
LHR
-
MIA
Nonstop9h 35m
American Airlines
Thu 4/613:49
MIA
-
LHR
1 stop15h 26m
American Airlines
Deal found 17/4£501
Mon 25/509:55
LHR
-
MIA
Nonstop9h 35m
American Airlines
Thu 4/613:49
MIA
-
LHR
1 stop15h 26m
American Airlines
Deal found 17/4£502
Tue 1/914:30
LGW
-
MIA
1 stop34h 30m
LEVEL
Mon 7/921:45
MIA
-
LGW
1 stop31h 30m
LEVEL
Deal found 18/4£502
Tue 21/412:40
STN
-
MIA
2 stops32h 20m
Multiple Airlines
Tue 28/419:45
MIA
-
STN
2 stops23h 05m
Multiple Airlines
Deal found 16/4£502
Mon 9/1110:00
LGW
-
MIA
1 stop14h 30m
Air Europa
Sat 14/1121:45
MIA
-
LGW
1 stop30h 15m
Air Europa
Deal found 17/4£502
Wed 27/507:45
STN
-
MIA
1 stop17h 15m
Multiple Airlines
Mon 8/621:45
MIA
-
STN
1 stop15h 30m
Multiple Airlines
Deal found 17/4£503
Tue 22/912:15
LHR
-
MIA
Nonstop9h 45m
Finnair
Tue 6/1019:15
MIA
-
LHR
Nonstop8h 45m
Finnair
Deal found 19/4£503
Wed 6/508:25
SEN
-
MIA
1 stop16h 35m
Multiple Airlines
Sun 10/521:45
MIA
-
SEN
1 stop16h 50m
Multiple Airlines
Deal found 16/4£503
Wed 27/507:10
LGW
-
MIA
1 stop17h 50m
Multiple Airlines
Mon 8/621:45
MIA
-
LGW
1 stop20h 05m
Multiple Airlines
Deal found 17/4£503
Wed 22/415:30
STN
-
MIA
2 stops29h 30m
Multiple Airlines
Sun 26/419:50
MIA
-
STN
2 stops22h 15m
Multiple Airlines
Deal found 17/4£504

Find flight deals from London to Key Largo

Keep the following information in mind while searching for London to Key Largo flight deals. Data was last updated 19 April 2026.

Round-trip from

£501

One-way from

£330

Popular in

December

Cheapest in

September

Average price

£526
American Airlines
  • American Airlines
  • 27/5-4/6
  • 1 total stop
  • 25h 01m total
  • London to Key Largo
Search Deals
24/4
  • 24/4
  • 3 total stops
  • 50h 20m total
  • London to Key Largo
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£5 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Key Largo 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, Cheapflights users made 858,174 searches. Data last updated 19 April 2026.
Use the filters below to find and compare flights from London to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Fri 3/7

10:55-20:00

1 stop14h 05m

Miami

Wed 15/7

21:45-12:15

1 stop33h 30m

£516

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 1/6

10:45-20:05

1 stop14h 20m

Miami

Mon 8/6

16:46-10:10

1 stop12h 24m

£518

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 30/5

06:30-14:45

1 stop13h 15m

Miami

Sat 6/6

15:40-10:20

1 stop13h 40m

£536

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 9/7

08:55-17:50

1 stop13h 55m

Miami

Tue 21/7

13:38-07:10

1 stop12h 32m

£540

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 10/10

10:55-15:50

Nonstop9h 55m

Miami

Sun 18/10

19:30-13:15

1 stop12h 45m

£547

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 20/7

15:40-20:15

Nonstop9h 35m

Miami

Mon 3/8

14:34-07:40

1 stop12h 06m

£549

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 8/7

09:55-14:30

Nonstop9h 35m

Miami

Sun 12/7

18:33-21:40

1 stop22h 07m

£553

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 9/6

06:30-14:45

1 stop13h 15m

Miami

Thu 2/7

18:05-08:05

Nonstop9h 00m

£554

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 7/7

09:40-18:58

1 stop14h 18m

Miami

Mon 20/7

23:00-16:35

1 stop12h 35m

£561

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 4/5

08:55-17:50

1 stop13h 55m

Miami

Mon 18/5

19:30-12:05

1 stop11h 35m

£568

Flights are sorted by cheapest return flights first.

Deals found on 15/4

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from London to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from London with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to Key Largo

How far ahead should I book a flight from London to Key Largo?

Use this chart to determine the optimal time to book a return flight from London to Key Largo. Price data was last updated on 17 April 2026.

Booking 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Key Largo. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest time of day to fly from LON to KE9?

Find hourly flight availability from London to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 19 April 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Key Largo as you normally would.

Weekly flight availability from London to Key Largo

Explore weekly flight availability from London to Key Largo. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 19 April 2026.

The most flights from LON to KE9 are scheduled on a Saturday (28 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (24 on average).

How much does it cost for a return flight from London to Key Largo?

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Key Largo. Reviews last updated 19 April 2026.
Read through reviews of airlines operating flights from London to Key Largo, such as Finnair,Virgin Atlantic, andNorse Atlantic UK. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.7
Good
1,390 reviews
Check prices

Boarding

7.7

Entertainment

6.9

Overall

7.7

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
Finnair
7.7
Good
1,390 reviews
Finnair
7.7
Good
1,390 reviews
Check prices

Boarding

7.7

Entertainment

6.9

Overall

7.7

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
Virgin Atlantic
7.5
Good
687 reviews
Finnair
7.7
Good
1,390 reviews
Check prices

Boarding

7.7

Entertainment

6.9

Overall

7.7

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
Norse Atlantic UK
7.3
Good
Finnair
7.7
Good
1,390 reviews
Check prices

Boarding

7.7

Entertainment

6.9

Overall

7.7

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
American Airlines
7.1
Good
11,621 reviews
Finnair
7.7
Good
1,390 reviews
Check prices

Boarding

7.7

Entertainment

6.9

Overall

7.7

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
British Airways
6.7
Okay
7,893 reviews
Finnair
7.7
Good
1,390 reviews
Check prices

Boarding

7.7

Entertainment

6.9

Overall

7.7

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space

Related info for your journey

Find useful and relevant information for your journey from London to Key Largo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London to Key Largo?

    American Airlines, Finnair, and British Airways can get you from London to Key Largo in just under 9h 35m. Your travel time will be generally consistent. London and Key Largo are separated by a distance of 4414 mi. Most flights are nonstop.

  • What are the cheapest airlines to fly from London to Key Largo one-way?

    The cheapet airlines for a one-way flight from London to Key Largo are Norse Atlantic UK (£174), TAP AIR PORTUGAL (£248), and Aer Lingus (£290).

  • What are the most popular routes from London to Key Largo?

    When deciding which route to take from London to Key Largo consider London Heathrow - Miami, London Gatwick - Miami or London Stansted - Miami as they are the most popular.

  • What are the most reliable airlines from London to Key Largo?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Key Largo on time: Malaysia Airlines (91%), Gulf Air (88%), SriLankan Airlines (84%).

  • What are the cheapest flights from London to Key Largo?

    The cheapest flight price from London to Key Largo is £438. On average you can expect to pay £1,602. The most popular route, (London Heathrow - Miami), can usually be booked for £375.

  • Can I find deals for flights from London to Key Largo that include hotel bookings?

    Yes. In addition to deals on London to Key Largo flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Key Largo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Key Largo.

  • Can I find deals for business class flights from London to Key Largo?

    Yes. Cheapflights offers flight deals from London to Key Largo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Top 10 airlines flying from London to Key Largo

Discover the top 10 airlines that operate flights from London to Key Largo. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 19 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£272Average£414FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£295Average£376FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£297Average£424FlexibilityNo cancel feeOn-time79%
Search SWISS flights
DeltaCheapest£301Average£633FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£308Average£364FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
A.P.G.Cheapest£321Average£527FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
Air EuropaCheapest£352Average£467FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
United AirlinesCheapest£353Average£523FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£355Average£520FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£356Average£508FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Key Largo?

Deals for London to Key Largo flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London to Key Largo?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to Key Largo.

Can Cheapflights find flights from London to Key Largo with no change fees?

Need flexible booking options for your flight to Key Largo from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from London to Key Largo become cheaper?

Of course! You can now track prices for flights from London to Key Largo and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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