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Cheap flights from London to Key Largo from £329

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 14/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
24 May — 31 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 24 April 2026.

Tue 5/506:00
LHR
-
MIA
1 stop13h 35m
TAP AIR PORTUGAL
Mon 25/116:50
MIA
-
LHR
1 stop14h 50m
TAP AIR PORTUGAL
Deal found 20/4£501
Fri 4/1210:40
LGW
-
MIA
1 stop16h 05m
TAP AIR PORTUGAL
Wed 9/1216:50
MIA
-
LGW
1 stop17h 15m
TAP AIR PORTUGAL
Deal found 20/4£501
Wed 27/509:55
LHR
-
MIA
1 stop15h 05m
LEVEL
Mon 27/721:45
MIA
-
LHR
1 stop30h 25m
LEVEL
Deal found 21/4£503
Wed 10/608:25
SEN
-
MIA
1 stop16h 35m
Multiple Airlines
Wed 17/621:45
MIA
-
SEN
1 stop19h 05m
Multiple Airlines
Deal found 19/4£503
Mon 18/519:55
STN
-
MIA
2 stops27h 50m
Multiple Airlines
Mon 25/521:30
MIA
-
STN
2 stops21h 25m
Multiple Airlines
Deal found 20/4£504
Tue 21/718:05
LHR
-
MIA
1 stop35h 16m
Finnair
Tue 4/819:35
MIA
-
LHR
Nonstop8h 50m
Finnair
Deal found 21/4£504
Sun 24/506:30
LHR
-
MIA
1 stop13h 15m
Multiple Airlines
Tue 9/618:05
MIA
-
LHR
Nonstop9h 00m
Multiple Airlines
Deal found 22/4£505
Wed 22/410:00
LGW
-
MIA
1 stop13h 45m
Air Europa
Mon 27/421:30
MIA
-
LGW
1 stop30h 30m
Air Europa
Deal found 19/4£505
Wed 1/715:35
LHR
-
MIA
Nonstop9h 35m
British Airways
Mon 6/717:00
MIA
-
LHR
Nonstop8h 55m
British Airways
Deal found 20/4£505
Tue 5/521:15
LGW
-
MIA
2 stops22h 20m
TAP AIR PORTUGAL
Mon 25/116:50
MIA
-
LGW
1 stop17h 55m
TAP AIR PORTUGAL
Deal found 23/4£505
Fri 5/605:40
LTN
-
MIA
1 stop19h 20m
Multiple Airlines
Mon 15/621:45
MIA
-
LTN
1 stop20h 15m
Multiple Airlines
Deal found 23/4£506
Mon 8/609:55
LHR
-
MIA
Nonstop9h 35m
American Airlines
Mon 22/613:49
MIA
-
LHR
1 stop15h 26m
American Airlines
Deal found 20/4£506

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 24 April 2026.

Round-trip from

£501

One-way from

£329

Popular in

December

Cheapest in

September

Average price

£527
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 5/5-25/1
  • 2 total stops
  • 28h 25m total
  • London to Key Largo
Search Deals
14/5
  • 14/5
  • 1 total stop
  • 17h 45m 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 24 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

Tue 12/5

12:20-20:59

1 stop13h 39m

Miami

Tue 2/6

16:15-08:40

1 stop11h 25m

£540

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 24/5

06:30-14:45

1 stop13h 15m

Miami

Wed 3/6

14:01-11:20

2 stops16h 19m

£544

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 29/6

12:20-20:45

1 stop13h 25m

Miami

Tue 11/8

16:18-08:40

1 stop11h 22m

£545

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 22/9

08:45-17:25

1 stop13h 40m

Miami

Mon 28/9

12:15-09:20

2 stops16h 05m

£567

LondonMiami

LTN - MIA

LTNMIA

London Luton

Wed 8/7

05:40-20:00

1 stop19h 20m

Miami

Mon 20/7

21:45-23:00

1 stop20h 15m

£567
Fastest return journey

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 2/7

15:50-20:45

Nonstop9h 55m

Miami

Tue 7/7

22:35-12:35

Nonstop9h 00m

£568

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 8/9

08:45-17:25

1 stop13h 40m

Miami

Tue 22/9

11:28-10:00

3 stops17h 32m

£570

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 6/7

06:50-20:00

1 stop18h 10m

Miami

Sun 12/7

21:45-10:15

1 stop31h 30m

£575

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Fri 10/7

07:10-20:00

1 stop17h 50m

Miami

Sun 19/7

21:45-17:40

1 stop14h 55m

£576

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 13/7

10:55-15:50

Nonstop9h 55m

Miami

Thu 23/7

22:35-12:35

Nonstop9h 00m

£576

Flights are sorted by cheapest return flights first.

Deals found on 24/4

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

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 24 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 24 April 2026.

The most flights from LON to KE9 are scheduled on a Wednesday (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 24 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
1,391 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Overall

7.7

Food

6.7

Crew

8.2

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.7
Good
1,391 reviews
Finnair
7.7
Good
1,391 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Overall

7.7

Food

6.7

Crew

8.2

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Virgin Atlantic
7.5
Good
687 reviews
Finnair
7.7
Good
1,391 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Overall

7.7

Food

6.7

Crew

8.2

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Norse Atlantic UK
7.2
Good
Finnair
7.7
Good
1,391 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Overall

7.7

Food

6.7

Crew

8.2

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
American Airlines
7.1
Good
11,669 reviews
Finnair
7.7
Good
1,391 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Overall

7.7

Food

6.7

Crew

8.2

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
British Airways
6.7
Okay
7,911 reviews
Finnair
7.7
Good
1,391 reviews
Check prices

Entertainment

6.9

Boarding

7.7

Overall

7.7

Food

6.7

Crew

8.2

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

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?

    British Airways, Delta, and United Airlines can get you from London to Key Largo in just under 13h 15m. Your travel time can differ by up to 25m. London and Key Largo are separated by a distance of 4414 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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 £439. On average you can expect to pay £1,604. The most popular route, (London Heathrow - Miami), can usually be booked for £357.

  • 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 24 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£272Average£415FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£295Average£377FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£297Average£425FlexibilityNo cancel feeOn-time79%
Search SWISS flights
DeltaCheapest£302Average£634FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£309Average£364FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
A.P.G.Cheapest£321Average£528FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
Air EuropaCheapest£352Average£468FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
United AirlinesCheapest£354Average£524FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£355Average£521FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£356Average£509FlexibilityNo 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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