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Cheap flights from London to Key Largo from £197

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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
16 Jul — 23 Jul1
1 adult

Cheapflights Tip: The best prices from London to Key Largo are usually found in September or March, booked 90 days in advance, depart on a Monday or Wednesday and return on a Wednesday

Cheap 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 11 July 2025.

Round-trip from

£349

One-way from

£197

Popular in

December

Cheapest in

September

Average price

£549
SWISS
  • SWISS
  • 9/9-21/9
  • 2 total stops
  • 34h 50m total
  • London to Key Largo
7/10
  • 7/10
  • 1 total stop
  • 30h 50m total
  • London to Key Largo
Highest demand for flights based on searches. 1% potential increase in price (£6 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from London to Key Largo

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 11 July 2025.

Tue 9/908:45LHR - MIA
1 stop13h 45mSWISS
Sun 21/919:40MIA - LHR
1 stop21h 05mSWISS
Deal found 9/7£349
Mon 25/810:00LGW - MIA
Nonstop9h 20mMultiple Airlines
Tue 9/907:00MIA - LGW
2 stops18h 20mMultiple Airlines
Deal found 9/7£349
Fri 21/1106:40LHR - MIA
1 stop16h 25mScandinavian Airlines
Fri 5/1219:55MIA - LHR
1 stop15h 05mScandinavian Airlines
Deal found 10/7£350
Mon 25/810:00LGW - MIA
Nonstop9h 20mA.P.G.
Tue 9/917:15MIA - LGW
Nonstop8h 45mA.P.G.
Deal found 9/7£350
Wed 20/810:00LGW - MIA
Nonstop9h 20mNorse Atlantic UK
Fri 5/917:15MIA - LGW
Nonstop8h 45mNorse Atlantic UK
Deal found 10/7£352
Tue 9/909:25LCY - MIA
1 stop13h 05mSWISS
Mon 22/919:40MIA - LCY
1 stop11h 50mSWISS
Deal found 9/7£356
Mon 25/806:30LHR - MIA
1 stop13h 10mMultiple Airlines
Tue 9/919:40MIA - LHR
1 stop17h 10mMultiple Airlines
Deal found 9/7£358
Thu 6/1112:15LHR - MIA
1 stop13h 40mIcelandair
Fri 14/1117:15MIA - LHR
1 stop12h 35mIcelandair
Deal found 9/7£371
Mon 15/915:05LGW - MIA
1 stop13h 12mBritish Airways
Mon 22/916:04MIA - LGW
1 stop11h 06mBritish Airways
Deal found 10/7£371
Mon 8/910:45LHR - MIA
Nonstop10h 00mVirgin Atlantic
Thu 18/922:30MIA - LHR
Nonstop8h 45mVirgin Atlantic
Deal found 9/7£388
Wed 17/911:30LHR - MIA
1 stop13h 25mBritish Airways
Mon 22/917:00MIA - LHR
Nonstop8h 55mBritish Airways
Deal found 9/7£389
Thu 28/808:40LHR - MIA
1 stop13h 50mUnited Airlines
Thu 11/916:56MIA - LHR
1 stop13h 29mUnited Airlines
Deal found 10/7£394

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 11 July 2025.
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

LHR - MIA

LHRMIA

London Heathrow

Tue 9/9

08:45-17:30

1 stop13h 45m

Miami

Sun 21/9

19:40-21:45

1 stop21h 05m

£349

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 25/8

10:00-14:20

Nonstop9h 20m

Miami

Tue 9/9

07:00-06:20

2 stops18h 20m

£349

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Fri 21/11

06:40-18:05

1 stop16h 25m

Miami

Fri 5/12

19:55-16:00

1 stop15h 05m

£350

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 25/8

10:00-14:20

Nonstop9h 20m

Miami

Tue 9/9

17:15-07:00

Nonstop8h 45m

£350

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Wed 20/8

10:00-14:20

Nonstop9h 20m

Miami

Fri 5/9

17:15-07:00

Nonstop8h 45m

£352

LondonMiami

LCY - MIA

LCYMIA

London City

Tue 9/9

09:25-17:30

1 stop13h 05m

Miami

Mon 22/9

19:40-12:30

1 stop11h 50m

£356

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 25/8

06:30-14:40

1 stop13h 10m

Miami

Tue 9/9

19:40-17:50

1 stop17h 10m

£358

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 6/11

12:15-20:55

1 stop13h 40m

Miami

Fri 14/11

17:15-10:50

1 stop12h 35m

£371

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 15/9

15:05-23:17

1 stop13h 12m

Miami

Mon 22/9

16:04-08:10

1 stop11h 06m

£371

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 1/1

07:40-16:55

1 stop14h 15m

Miami

Thu 22/1

14:30-10:25

1 stop14h 55m

£385

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 38 results
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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 27 June 2025.

Booking 90 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, January is the cheapest month in which you can book a flight from London to Key Largo (average of £559). Flying from London to Key Largo in July is currently the most expensive (average of £760). 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 11 July 2025.

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.

What is the cheapest day to fly from London to Key Largo?

Use this chart to determine the cheapest time to fly return from London to Key Largo. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Key Largo flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 11 July 2025.

The most flights from LON to KE9 are scheduled on a Monday (27 on average). You will have fewer flight options on Sunday, 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 11 July 2025.
Read through reviews of airlines operating flights from London to Key Largo, such as KLM, Air France, andSWISS. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Comfort

7.7

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Comfort

7.7

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Comfort

7.7

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Comfort

7.7

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Comfort

7.7

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Comfort

7.7

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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.
  • 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 (£197), Iberia (£204), and A.P.G. (£208).

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

  • 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 (88%), Finnair (87%), KLM (87%).

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

    The cheapest flight price from London to Key Largo is £371. On average you can expect to pay £1,783. The most popular route, (London Heathrow - Miami), can usually be booked for £308.

  • 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, January is the cheapest month in which you can book a flight from London to Key Largo (average of £559). Flying from London to Key Largo in July is currently the most expensive (average of £760). 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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Alternative routes for London to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.

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 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£268Average£509FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Norse Atlantic UKCheapest£270Average£411FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
DeltaCheapest£279Average£615FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£317Average£425FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£323Average£451FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapest£341Average£448FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapest£341Average£460FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
SWISSCheapest£341Average£472FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Air EuropaCheapest£350Average£434FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
United AirlinesCheapest£352Average£552FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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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