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Cheap flights from London to Key Largo from £332

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 29/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
14 Jun — 21 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Key Largo are usually found in September or February, booked 82 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 15 May 2026.

Tue 9/609:15
LHR
-
MIA
1 stop17h 41m
British Airways
Mon 22/613:49
MIA
-
LHR
1 stop15h 26m
British Airways
Deal found 10/5£520
Sun 18/1010:00
LGW
-
MIA
1 stop13h 45m
Air Europa
Thu 5/1121:45
MIA
-
LGW
1 stop13h 40m
Air Europa
Deal found 10/5£520
Mon 29/611:10
LHR
-
MIA
1 stop14h 08m
American Airlines
Tue 7/713:48
MIA
-
LHR
1 stop15h 27m
American Airlines
Deal found 11/5£521
Tue 2/606:30
LHR
-
MIA
1 stop13h 15m
Virgin Atlantic
Tue 9/622:35
MIA
-
LHR
Nonstop9h 00m
Virgin Atlantic
Deal found 12/5£521
Mon 16/1117:25
LGW
-
MIA
1 stop31h 05m
Air Europa
Sat 28/1121:45
MIA
-
LGW
1 stop13h 40m
Air Europa
Deal found 12/5£521
Tue 26/511:30
LGW
-
MIA
1 stop13h 55m
Iberia
Tue 30/617:05
MIA
-
LGW
1 stop12h 45m
Iberia
Deal found 14/5£522
Mon 1/620:55
LHR
-
MIA
1 stop22h 50m
Virgin Atlantic
Thu 20/814:08
MIA
-
LHR
1 stop11h 17m
Virgin Atlantic
Deal found 14/5£523
Wed 11/1105:55
LTN
-
MIA
1 stop19h 05m
Multiple Airlines
Wed 25/1122:35
MIA
-
LTN
2 stops18h 45m
Multiple Airlines
Deal found 14/5£523
Thu 14/510:00
LGW
-
MIA
1 stop13h 45m
Air Europa
Wed 27/521:30
MIA
-
LGW
1 stop13h 55m
Air Europa
Deal found 11/5£523
Sun 12/712:55
LHR
-
MIA
1 stop15h 04m
American Airlines
Thu 23/713:48
MIA
-
LHR
1 stop15h 27m
American Airlines
Deal found 12/5£524
Fri 2/1010:00
LGW
-
MIA
1 stop13h 45m
Air Europa
Sat 17/1021:30
MIA
-
LGW
1 stop13h 55m
Air Europa
Deal found 13/5£524
Tue 22/906:30
LHR
-
MIA
1 stop13h 15m
Virgin Atlantic
Thu 8/1022:35
MIA
-
LHR
Nonstop9h 00m
Virgin Atlantic
Deal found 14/5£524

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 15 May 2026.

Round-trip from

£520

One-way from

£332

Popular in

December

Cheapest in

September

Average price

£526
British Airways
  • British Airways
  • 9/6-22/6
  • 2 total stops
  • 33h 07m total
  • London to Key Largo
Search Deals
29/9
  • 29/9
  • 3 total stops
  • 25h 55m total
  • London to Key Largo
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 15 May 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

Wed 16/9

10:55-20:00

1 stop14h 05m

Miami

Wed 30/9

22:00-10:50

1 stop31h 50m

£523

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Fri 5/6

07:10-20:00

1 stop17h 50m

Miami

Mon 8/6

21:55-22:50

1 stop19h 55m

£545

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Wed 24/6

12:20-20:45

1 stop13h 25m

Miami

Mon 13/7

16:30-10:10

1 stop12h 40m

£557

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 1/6

12:20-20:45

1 stop13h 25m

Miami

Mon 6/7

17:35-10:10

1 stop11h 35m

£563

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 9/7

06:15-17:50

1 stop16h 35m

Miami

Sun 19/7

11:24-06:20

1 stop13h 56m

£564

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 25/5

15:50-20:45

Nonstop9h 55m

Miami

Thu 4/6

18:05-08:05

Nonstop9h 00m

£568

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Tue 21/7

17:00-10:24

2 stops22h 24m

Miami

Tue 4/8

11:50-09:25

2 stops16h 35m

£573

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 20/6

06:30-14:45

1 stop13h 15m

Miami

Tue 30/6

15:25-12:10

1 stop15h 45m

£574

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 31/5

06:30-14:45

1 stop13h 15m

Miami

Wed 8/7

12:02-08:50

2 stops15h 48m

£574

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 2/11

07:30-20:37

2 stops18h 07m

Miami

Thu 19/11

13:25-09:10

2 stops14h 45m

£576

Flights are sorted by cheapest return flights first.

Deals found on 9/5

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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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 15 May 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 15 May 2026.

The most flights from LON to KE9 are scheduled on a Tuesday (28 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (19 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 15 May 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
7.6
Good
1,393 reviews
Check prices

Boarding

7.7

Overall

7.6

Crew

8.2

Food

6.7

Comfort

7.4

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.6
Good
1,393 reviews
Finnair
7.6
Good
1,393 reviews
Check prices

Boarding

7.7

Overall

7.6

Crew

8.2

Food

6.7

Comfort

7.4

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Virgin Atlantic
7.4
Good
688 reviews
Finnair
7.6
Good
1,393 reviews
Check prices

Boarding

7.7

Overall

7.6

Crew

8.2

Food

6.7

Comfort

7.4

Entertainment

6.9

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
7.6
Good
1,393 reviews
Check prices

Boarding

7.7

Overall

7.6

Crew

8.2

Food

6.7

Comfort

7.4

Entertainment

6.9

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
11,664 reviews
Finnair
7.6
Good
1,393 reviews
Check prices

Boarding

7.7

Overall

7.6

Crew

8.2

Food

6.7

Comfort

7.4

Entertainment

6.9

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
7,979 reviews
Finnair
7.6
Good
1,393 reviews
Check prices

Boarding

7.7

Overall

7.6

Crew

8.2

Food

6.7

Comfort

7.4

Entertainment

6.9

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?

    LEVEL, British Airways, and Delta can get you from London to Key Largo in just under 15h 05m. Your travel time can differ by up to 1h 30m. 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 (£176), TAP AIR PORTUGAL (£249), and Aer Lingus (£291).

  • 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: Gulf Air (92%), SriLankan Airlines (91%), Malaysia Airlines (89%).

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

    The cheapest flight price from London to Key Largo is £401. On average you can expect to pay £1,608. 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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Alternative routes for London to Key Largo

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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 15 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£273Average£415FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£296Average£375FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£298Average£425FlexibilityNo cancel feeOn-time79%
Search SWISS flights
DeltaCheapest£307Average£645FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£309Average£364FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
A.P.G.Cheapest£321Average£430FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
TAP AIR PORTUGALCheapest£345Average£522FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air EuropaCheapest£353Average£468FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
United AirlinesCheapest£354Average£532FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£355Average£526FlexibilityNo cancel feeOn-time70%
Search British Airways 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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