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Cheap flights from London to Key Largo from £421

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 17/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — MIA
7 Jul — 14 Jul1
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 36 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 7 June 2026.

Fri 3/710:45
LGW
-
MIA
1 stop14h 05m
British Airways
Mon 6/715:41
MIA
-
LGW
1 stop11h 59m
British Airways
Deal found 5/6£530
Tue 7/707:45
LCY
-
MIA
1 stop12h 00m
Virgin Atlantic
Tue 14/711:30
MIA
-
LCY
2 stops17h 00m
Virgin Atlantic
Deal found 6/6£531
Thu 2/712:15
LHR
-
MIA
Nonstop9h 40m
British Airways
Thu 9/717:00
MIA
-
LHR
Nonstop8h 55m
British Airways
Deal found 7/6£531
Sat 7/1110:00
LGW
-
MIA
1 stop14h 30m
Air Europa
Thu 31/1221:45
MIA
-
LGW
1 stop13h 40m
Air Europa
Deal found 2/6£531
Wed 8/709:20
LCY
-
MIA
2 stops19h 15m
Virgin Atlantic
Mon 13/711:30
MIA
-
LCY
2 stops16h 20m
Virgin Atlantic
Deal found 5/6£531
Wed 2/921:20
STN
-
MIA
2 stops26h 25m
Multiple Airlines
Wed 23/921:30
MIA
-
STN
2 stops21h 40m
Multiple Airlines
Deal found 3/6£531
Wed 1/718:55
LHR
-
MIA
2 stops28h 59m
Virgin Atlantic
Wed 22/711:30
MIA
-
LHR
1 stop14h 15m
Virgin Atlantic
Deal found 3/6£531
Tue 21/710:35
LGW
-
MIA
2 stops16h 24m
Virgin Atlantic
Tue 28/723:00
MIA
-
LGW
1 stop12h 00m
Virgin Atlantic
Deal found 3/6£531
Sat 11/707:45
LCY
-
MIA
2 stops20h 56m
Virgin Atlantic
Thu 23/716:55
MIA
-
LCY
1 stop20h 35m
Virgin Atlantic
Deal found 7/6£532
Fri 2/1007:30
LHR
-
MIA
2 stops16h 27m
United Airlines
Mon 12/1013:21
MIA
-
LHR
2 stops16h 59m
United Airlines
Deal found 4/6£532
Sat 29/805:40
LTN
-
MIA
2 stops21h 31m
Multiple Airlines
Sat 5/913:10
MIA
-
LTN
2 stops18h 10m
Multiple Airlines
Deal found 6/6£532
Fri 11/910:25
LGW
-
MIA
2 stops17h 48m
Virgin Atlantic
Fri 25/915:23
MIA
-
LGW
2 stops19h 37m
Virgin Atlantic
Deal found 4/6£532

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 7 June 2026.

Round-trip from

£530

One-way from

£421

Popular in

December

Cheapest in

September

Average price

£524
British Airways
  • British Airways
  • 3/7-6/7
  • 2 total stops
  • 26h 04m total
  • London to Key Largo
Search Deals
17/6
  • 17/6
  • 3 total stops
  • 50h 00m 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 June 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 7 June 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

LCY - MIA

LCYMIA

London City

Sat 11/7

07:45-23:41

2 stops20h 56m

Miami

Thu 23/7

16:55-18:30

1 stop20h 35m

£532

LondonMiami

LCY - MIA

LCYMIA

London City

Thu 9/7

10:00-00:55

2 stops19h 55m

Miami

Thu 16/7

16:55-18:30

1 stop20h 35m

£533

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 21/9

07:00-17:30

2 stops15h 30m

Miami

Thu 1/10

19:40-16:25

1 stop15h 45m

£537

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 14/10

08:40-17:25

1 stop13h 45m

Miami

Wed 28/10

12:00-08:25

2 stops16h 25m

£537

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 17/8

09:20-18:40

1 stop14h 20m

Miami

Tue 15/9

13:07-07:10

1 stop13h 03m

£538

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Thu 26/11

09:55-18:05

2 stops37h 10m

Miami

Thu 3/12

19:55-09:20

1 stop32h 25m

£543

LondonMiami

LCY - MIA

LCYMIA

London City

Fri 10/7

20:15-14:45

1 stop23h 30m

Miami

Mon 13/7

11:30-09:30

2 stops17h 00m

£543

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Fri 10/7

07:30-19:25

2 stops16h 55m

Miami

Mon 13/7

13:10-11:55

2 stops17h 45m

£545
Fastest return journey

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Mon 29/6

12:15-16:55

Nonstop9h 40m

Miami

Mon 20/7

22:40-12:35

Nonstop8h 55m

£550

LondonMiami

LHR - MIA

LHRMIA

London Heathrow

Wed 8/7

12:15-16:55

Nonstop9h 40m

Miami

Fri 31/7

19:10-12:10

1 stop12h 00m

£563

Flights are sorted by cheapest return flights first.

Deals found on 2/6

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 7 June 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 7 June 2026.

The most flights from LON to KE9 are scheduled on a Monday (24 on average). You will have fewer flight options on Monday, 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 7 June 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
7.7
Good
1,403 reviews
Check prices

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Overall

7.7

Comfort

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
Finnair
7.7
Good
1,403 reviews
Finnair
7.7
Good
1,403 reviews
Check prices

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Overall

7.7

Comfort

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
Virgin Atlantic
7.5
Good
689 reviews
Finnair
7.7
Good
1,403 reviews
Check prices

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Overall

7.7

Comfort

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
Norse Atlantic UK
7.2
Good
Finnair
7.7
Good
1,403 reviews
Check prices

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Overall

7.7

Comfort

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
American Airlines
7.1
Good
11,655 reviews
Finnair
7.7
Good
1,403 reviews
Check prices

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Overall

7.7

Comfort

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space
British Airways
6.7
Okay
8,028 reviews
Finnair
7.7
Good
1,403 reviews
Check prices

Food

6.7

Crew

8.2

Entertainment

6.9

Boarding

7.7

Overall

7.7

Comfort

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

HEL - KAO

It’s a small plane with minimal service and luggage space

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?

    Virgin Atlantic, SWISS, and United Airlines can get you from London to Key Largo in just under 13h 45m. Your travel time can differ by up to 7h 11m. 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 (£144), TAP AIR PORTUGAL (£251), and Aer Lingus (£294).

  • 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 (93%), Gulf Air (92%), KLM (85%).

  • 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 £1,571. The most popular route, (London Heathrow - Miami), can usually be booked for £335.

  • 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 7 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£268Average£418FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£299Average£381FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£301Average£367FlexibilityNo cancel feeOn-time79%
Search SWISS flights
DeltaCheapest£310Average£660FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£312Average£371FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
A.P.G.Cheapest£325Average£396FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
TAP AIR PORTUGALCheapest£348Average£515FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air EuropaCheapest£356Average£474FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
United AirlinesCheapest£358Average£538FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest£360Average£546FlexibilityNo 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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