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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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
5 May — 12 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Key Largo are usually found in September or May, 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 5 April 2026.

Wed 15/416:30
LTN
-
MIA
2 stops28h 30m
Multiple Airlines
Wed 22/419:45
MIA
-
LTN
2 stops21h 55m
Multiple Airlines
Deal found 1/4£473
Wed 29/421:20
STN
-
MIA
2 stops26h 25m
Multiple Airlines
Sun 10/521:30
MIA
-
STN
2 stops19h 35m
Multiple Airlines
Deal found 1/4£475
Mon 13/407:50
STN
-
MIA
2 stops35h 55m
Multiple Airlines
Mon 20/419:45
MIA
-
STN
2 stops24h 10m
Multiple Airlines
Deal found 1/4£478
Tue 14/415:10
STN
-
MIA
2 stops29h 50m
Multiple Airlines
Tue 21/419:45
MIA
-
STN
2 stops20h 10m
Multiple Airlines
Deal found 1/4£479
Wed 29/421:15
LGW
-
MIA
2 stops26h 30m
Multiple Airlines
Sun 10/521:30
MIA
-
LGW
2 stops19h 35m
Multiple Airlines
Deal found 1/4£480
Wed 15/420:50
LTN
-
MIA
2 stops24h 10m
Multiple Airlines
Mon 20/419:45
MIA
-
LTN
2 stops19h 30m
Multiple Airlines
Deal found 1/4£481
Wed 15/410:55
LGW
-
MIA
2 stops34h 05m
Multiple Airlines
Wed 22/419:45
MIA
-
LGW
2 stops18h 25m
Multiple Airlines
Deal found 1/4£481
Wed 15/419:20
STN
-
MIA
2 stops25h 40m
Multiple Airlines
Mon 20/419:45
MIA
-
STN
2 stops23h 10m
Multiple Airlines
Deal found 1/4£482
Thu 16/413:05
LHR
-
MIA
1 stop13h 50m
Icelandair
Wed 29/418:15
MIA
-
LHR
1 stop21h 05m
Icelandair
Deal found 31/3£482
Mon 20/420:50
STN
-
MIA
2 stops24h 10m
Multiple Airlines
Sun 26/419:50
MIA
-
STN
2 stops22h 15m
Multiple Airlines
Deal found 1/4£484
Tue 21/408:00
LTN
-
MIA
2 stops35h 35m
Multiple Airlines
Tue 28/416:30
MIA
-
LTN
2 stops16h 15m
Multiple Airlines
Deal found 31/3£485
Wed 15/416:30
LGW
-
MIA
2 stops28h 30m
Multiple Airlines
Mon 20/419:45
MIA
-
LGW
2 stops22h 05m
Multiple Airlines
Deal found 31/3£485

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 5 April 2026.

Round-trip from

£473

One-way from

£329

Popular in

December

Cheapest in

September

Average price

£529
15/4-22/4
  • 15/4-22/4
  • 4 total stops
  • 50h 25m total
  • London to Key Largo
Search Deals
11/4
  • 11/4
  • 3 total stops
  • 54h 30m total
  • London to Key Largo
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£8 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% 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 5 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 1/5

10:55-20:00

1 stop14h 05m

Miami

Fri 22/5

21:45-10:15

1 stop31h 30m

£496

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Sun 30/8

14:55-20:00

1 stop34h 05m

Miami

Sun 6/9

21:45-10:15

1 stop31h 30m

£517

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 16/4

20:50-20:00

1 stop28h 10m

Miami

Sun 19/4

21:45-09:10

1 stop30h 25m

£527

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 12/5

06:30-14:45

1 stop13h 15m

Miami

Tue 19/5

15:40-08:50

1 stop12h 10m

£538

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sun 3/5

06:30-14:45

1 stop13h 15m

Miami

Tue 19/5

11:37-06:45

1 stop14h 08m

£544

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Fri 1/5

09:55-20:00

1 stop15h 05m

Miami

Fri 15/5

21:45-20:05

1 stop17h 20m

£544

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Fri 29/5

10:55-20:00

1 stop14h 05m

Miami

Fri 12/6

21:45-10:15

1 stop31h 30m

£547

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Fri 8/5

07:10-20:00

1 stop17h 50m

Miami

Fri 15/5

21:45-19:00

1 stop16h 15m

£550

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Sun 19/4

20:40-20:25

1 stop28h 45m

Miami

Sun 26/4

20:05-06:50

1 stop29h 45m

£550
Fastest return journey

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 20/5

15:50-20:45

Nonstop9h 55m

Miami

Thu 28/5

18:05-08:05

Nonstop9h 00m

£551

Flights are sorted by cheapest return flights first.

Deals found on 5/4

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 3 April 2026.

Booking 31 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 month to book a flight from London to Key Largo?

Currently, May is the cheapest month in which you can book a flight from London to Key Largo (average of £226). Flying from London to Key Largo in January is currently the most expensive (average of £366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 5 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 5 April 2026.

The most flights from LON to KE9 are scheduled on a Monday (28 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (13 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 5 April 2026.
Read through reviews of airlines operating flights from London to Key Largo, such as KLM,Finnair, andVirgin Atlantic. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,490 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,490 reviews
KLM
7.7
Good
1,490 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Finnair
7.7
Good
1,379 reviews
KLM
7.7
Good
1,490 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
685 reviews
KLM
7.7
Good
1,490 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Norse Atlantic UK
7.3
Good
KLM
7.7
Good
1,490 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,857 reviews
KLM
7.7
Good
1,490 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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, KLM, and Virgin Atlantic can get you from London to Key Largo in just under 13h 15m. Your travel time can differ by up to 50m. 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 (£150), TAP AIR PORTUGAL (£254), and Aer Lingus (£297).

  • 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 (96%), Air France (91%), Delta (91%).

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

    The cheapest flight price from London to Key Largo is £397. On average you can expect to pay £1,673. The most popular route, (London Heathrow - Miami), can usually be booked for £425.

  • 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.

  • What is the cheapest month to book a flight from London to Key Largo?

    Currently, May is the cheapest month in which you can book a flight from London to Key Largo (average of £226). Flying from London to Key Largo in January is currently the most expensive (average of £366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 5 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£278Average£413FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£302Average£383FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£304Average£444FlexibilityNo cancel feeOn-time79%
Search SWISS flights
DeltaCheapest£308Average£635FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£316Average£372FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
A.P.G.Cheapest£348Average£558FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
Air EuropaCheapest£360Average£478FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
United AirlinesCheapest£361Average£522FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£363Average£524FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£364Average£536FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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