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Cheap flights from London to Key Largo from £307

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 16/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
21 Mar — 28 Mar1
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 7 days in advance, depart on a Wednesday or Monday 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 February 2026.

Tue 14/406:00
LHR
-
MIA
1 stop13h 30m
TAP AIR PORTUGAL
Wed 15/403:50
MIA
-
LHR
1 stop13h 10m
TAP AIR PORTUGAL
Deal found 17/2£381
Thu 30/413:05
LHR
-
MIA
1 stop13h 50m
Icelandair
Sun 3/518:15
MIA
-
LHR
1 stop12h 40m
Icelandair
Deal found 15/2£382
Fri 1/512:00
LHR
-
MIA
1 stop14h 55m
TAP AIR PORTUGAL
Sun 10/516:30
MIA
-
LHR
1 stop15h 15m
TAP AIR PORTUGAL
Deal found 17/2£385
Sat 21/1114:30
LHR
-
MIA
Nonstop10h 00m
British Airways
Mon 30/1117:10
MIA
-
LHR
Nonstop8h 40m
British Airways
Deal found 15/2£385
Wed 18/321:05
LGW
-
MIA
3 stops28h 50m
Multiple Airlines
Tue 24/300:15
MIA
-
LGW
3 stops28h 15m
Multiple Airlines
Deal found 18/2£386
Mon 13/415:40
LGW
-
MIA
1 stop35h 15m
Icelandair
Sun 26/418:15
MIA
-
LGW
1 stop15h 25m
Icelandair
Deal found 16/2£387
Thu 12/311:55
LGW
-
MIA
1 stop14h 00m
Icelandair
Wed 25/318:15
MIA
-
LGW
1 stop12h 40m
Icelandair
Deal found 16/2£389
Tue 17/311:55
LGW
-
MIA
2 stops25h 39m
Multiple Airlines
Tue 24/310:39
MIA
-
LGW
2 stops20h 16m
Multiple Airlines
Deal found 16/2£391
Thu 12/312:15
LHR
-
MIA
1 stop13h 40m
Icelandair
Wed 25/318:15
MIA
-
LHR
1 stop12h 35m
Icelandair
Deal found 16/2£391
Tue 1/1211:55
LGW
-
MIA
1 stop14h 00m
Icelandair
Fri 18/1217:15
MIA
-
LGW
1 stop12h 40m
Icelandair
Deal found 17/2£394
Mon 13/421:25
LHR
-
MIA
1 stop29h 30m
Icelandair
Wed 29/418:15
MIA
-
LHR
1 stop21h 05m
Icelandair
Deal found 18/2£397
Wed 18/210:00
LGW
-
MIA
1 stop14h 30m
Air Europa
Sun 22/221:45
MIA
-
LGW
1 stop13h 40m
Air Europa
Deal found 15/2£397

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 February 2026.

Round-trip from

£381

One-way from

£307

Popular in

December

Cheapest in

September

Average price

£462
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 14/4-15/4
  • 2 total stops
  • 26h 40m total
  • London to Key Largo
Search Deals
16/3
  • 16/3
  • 2 total stops
  • 40h 44m total
  • London to Key Largo
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£15 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 February 2026.
Use the filters below to find and compare flights from London to Key Largo that are best for you.

Fly from

London

Fly to

Key Largo

Route

Depart

Return

Price

LondonMiami

LTN - MIA

LTNMIA

London Luton

Wed 8/4

05:40-20:00

1 stop19h 20m

Miami

Sun 19/4

21:45-18:05

1 stop15h 20m

£437

LondonMiami

LTN - MIA

LTNMIA

London Luton

Mon 13/4

07:05-20:00

1 stop17h 55m

Miami

Sun 19/4

21:45-18:05

1 stop15h 20m

£443

LondonMiami

LTN - MIA

LTNMIA

London Luton

Mon 13/4

07:05-20:00

1 stop17h 55m

Miami

Mon 27/4

21:45-18:05

1 stop15h 20m

£444

LondonMiami

LTN - MIA

LTNMIA

London Luton

Wed 15/4

09:40-20:00

1 stop15h 20m

Miami

Fri 17/4

21:45-23:50

1 stop21h 05m

£447

LondonMiami

SEN - MIA

SENMIA

London Southend

Wed 8/4

08:25-20:00

1 stop16h 35m

Miami

Fri 17/4

21:45-21:45

1 stop19h 00m

£451

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 12/3

18:30-15:50

1 stop25h 20m

Miami

Fri 20/3

00:35-21:35

1 stop17h 00m

£456

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Tue 3/3

10:00-19:30

1 stop14h 30m

Miami

Sun 8/3

22:45-16:25

1 stop13h 40m

£461

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 2/3

10:00-19:30

1 stop14h 30m

Miami

Tue 10/3

22:45-16:25

1 stop13h 40m

£462

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 9/3

10:00-20:30

1 stop14h 30m

Miami

Tue 17/3

22:45-16:25

1 stop13h 40m

£464

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Tue 10/3

10:00-20:30

1 stop14h 30m

Miami

Tue 17/3

22:45-16:25

1 stop13h 40m

£464

Flights are sorted by cheapest return flights first.

Deals found on 19/2

Showing 1-10 of 60 results
1
2
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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

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 18 February 2026.

Booking 7 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 £227). Flying from London to Key Largo in January is currently the most expensive (average of £356). 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 19 February 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 February 2026.

The most flights from LON to KE9 are scheduled on a Tuesday (29 on average). You will have fewer flight options on Saturday, 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 February 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
1,458 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

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
1,458 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

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
7.6
Good
1,363 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

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
679 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

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
1,458 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

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
7,753 reviews
KLM
7.7
Good
1,458 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

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?

    TAP AIR PORTUGAL, Air Europa, and United Airlines can get you from London to Key Largo in just under 13h 30m. Your travel time can differ by up to 11h 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 (£146), A.P.G. (£213), and TAP AIR PORTUGAL (£249).

  • 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 City - 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 (94%), Gulf Air (87%), KLM (84%).

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

    The cheapest flight price from London to Key Largo is £379. On average you can expect to pay £1,628. The most popular route, (London Heathrow - Miami), can usually be booked for £385.

  • 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 £227). Flying from London to Key Largo in January is currently the most expensive (average of £356). 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 19 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£270Average£409FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£294Average£373FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£296Average£431FlexibilityNo cancel feeOn-time79%
Search SWISS flights
DeltaCheapest£300Average£615FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£308Average£363FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£324Average£505FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
A.P.G.Cheapest£340Average£540FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
LufthansaCheapest£342Average£475FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£348Average£488FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air EuropaCheapest£351Average£463FlexibilityNo cancel feeOn-time83%
Search Air Europa 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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