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Cheap flights from London to Key Largo from £303

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
14 Dec — 21 Dec1
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 Monday and return on a Wednesday

Find 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 14 November 2025.

Thu 20/1108:30LGW - MIA
1 stop15h 25mMultiple Airlines
Thu 27/1121:40MIA - LGW
1 stop27h 20mMultiple Airlines
Deal found 12/11£429
Thu 20/1110:00LGW - MIA
1 stop14h 30mAir Europa
Thu 4/1221:45MIA - LGW
1 stop13h 40mAir Europa
Deal found 12/11£430
Wed 3/1219:30LHR - MIA
2 stops27h 35mScandinavian Airlines
Tue 9/1219:55MIA - LHR
2 stops15h 30mScandinavian Airlines
Deal found 12/11£433
Sat 22/1111:55LGW - MIA
1 stop14h 00mIcelandair
Sun 7/1217:15MIA - LGW
1 stop12h 40mIcelandair
Deal found 12/11£435
Thu 4/1212:15LHR - MIA
1 stop13h 40mIcelandair
Fri 12/1217:15MIA - LHR
1 stop21h 15mIcelandair
Deal found 13/11£435
Wed 3/1219:25LGW - MIA
1 stop28h 30mMultiple Airlines
Tue 9/1221:03MIA - LGW
1 stop27h 57mMultiple Airlines
Deal found 12/11£435
Fri 21/1117:25LGW - MIA
1 stop31h 05mAir Europa
Thu 4/1221:45MIA - LGW
1 stop13h 40mAir Europa
Deal found 12/11£436
Tue 18/1110:00LGW - MIA
1 stop14h 30mAir Europa
Fri 28/1121:45MIA - LGW
1 stop13h 40mAir Europa
Deal found 12/11£437
Mon 17/1120:35LHR - MIA
1 stop29h 20mIcelandair
Wed 3/1217:15MIA - LHR
1 stop12h 35mIcelandair
Deal found 12/11£438
Wed 19/1110:00LGW - MIA
1 stop14h 30mAir Europa
Sun 30/1121:45MIA - LGW
1 stop30h 15mAir Europa
Deal found 12/11£438
Sat 22/1117:25LGW - MIA
1 stop31h 05mAir Europa
Mon 24/1121:45MIA - LGW
1 stop13h 40mAir Europa
Deal found 12/11£438
Wed 10/1206:50LTN - MIA
1 stop15h 20mMultiple Airlines
Wed 17/1219:05MIA - LTN
1 stop17h 00mMultiple Airlines
Deal found 12/11£439

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 14 November 2025.

Round-trip from

£428

One-way from

£303

Popular in

December

Cheapest in

September

Average price

£459
18/1-25/1
  • 18/1-25/1
  • 4 total stops
  • 52h 50m total
  • London to Key Largo
Search Deals
3/3
  • 3/3
  • 2 total stops
  • 24h 45m total
  • London to Key Largo
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£17 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 14 November 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

LTN - MIA

LTNMIA

London Luton

Fri 16/1

05:50-18:00

1 stop17h 10m

Miami

Sun 25/1

19:55-11:45

1 stop10h 50m

£438

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Tue 17/2

11:55-20:55

1 stop14h 00m

Miami

Fri 27/2

17:15-10:55

1 stop12h 40m

£440

LondonMiami

LTN - MIA

LTNMIA

London Luton

Sun 18/1

08:05-18:00

1 stop14h 55m

Miami

Sun 25/1

19:55-16:45

1 stop15h 50m

£444

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Tue 28/4

11:25-16:25

Nonstop10h 00m

Miami

Thu 7/5

20:35-10:40

Nonstop9h 05m

£454

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Sat 14/3

09:00-18:40

1 stop13h 40m

Miami

Thu 19/3

18:10-07:00

Nonstop8h 50m

£457

LondonMiami

LTN - MIA

LTNMIA

London Luton

Fri 12/12

05:50-17:10

1 stop16h 20m

Miami

Fri 19/12

19:05-16:15

1 stop16h 10m

£459

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Wed 11/3

10:00-20:30

1 stop14h 30m

Miami

Mon 23/3

22:45-16:25

1 stop13h 40m

£460

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Tue 17/3

10:00-20:30

1 stop14h 30m

Miami

Mon 23/3

22:45-16:25

1 stop13h 40m

£460

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Fri 13/3

10:00-20:30

1 stop14h 30m

Miami

Mon 23/3

22:45-16:25

1 stop13h 40m

£460

LondonMiami

LGW - MIA

LGWMIA

London Gatwick

Mon 16/3

10:00-20:30

1 stop14h 30m

Miami

Tue 24/3

22:45-16:25

1 stop13h 40m

£460

Flights are sorted by cheapest return flights first.

Deals found on 11/11

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 7 November 2025.

Booking 52 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 £234). Flying from London to Key Largo in July is currently the most expensive (average of £359). 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 14 November 2025.

A simple way to save on the total cost of your ticket is to fly from London to Key Largo in the afternoon. If you’re flexible enough to do this you can expect to save up to 10% on your trip compared to booking a flight in the evening.

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 Monday evenings when fares are most often at their lowest. Wednesday evenings 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 14 November 2025.

The most flights from LON to KE9 are scheduled on a Tuesday (24 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (20 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 14 November 2025.
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
1,335 reviews
Check prices

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,335 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Virgin Atlantic
7.5
Good
673 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Norse Atlantic UK
7.2
Good
Finnair
7.6
Good
1,335 reviews
Check prices

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
TAP AIR PORTUGAL
7.1
Good
2,059 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,516 reviews
Finnair
7.6
Good
1,335 reviews
Check prices

Crew

8.1

Overall

7.6

Food

6.7

Entertainment

6.9

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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?

    Icelandair, Delta, and Air Europa can get you from London to Key Largo in just under 10h. Your travel time can differ by up to 4h 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 SWISS (£307), United Airlines (£309), and British Airways (£319).

  • 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: SriLankan Airlines (100%), Gulf Air (84%), KLM (83%).

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

    The cheapest flight price from London to Key Largo is £356. On average you can expect to pay £1,713. The most popular route, (London Heathrow - Miami), can usually be booked for £306.

  • 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 £234). Flying from London to Key Largo in July is currently the most expensive (average of £359). 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 14 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£281Average£421FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
SWISSCheapest£305Average£479FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Scandinavian AirlinesCheapest£317Average£381FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£320Average£405FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£333Average£489FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
A.P.G.Cheapest£350Average£557FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
United AirlinesCheapest£351Average£523FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£352Average£488FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air EuropaCheapest£361Average£464FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
British AirwaysCheapest£363Average£509FlexibilityNo 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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